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  • Home
  • CEO diaries
    • After the HN launch
    • Remote companies can be too asynchronous
    • The time before YC
    • Winning from the back - late mover advantage
    • Optimize for not breaking up with your co-founder
    • Cancer and revenue - the latest board meeting
    • "How come your website is so nice?"
    • Things I learned last year
    • Our new objective: Nail Self Serve
    • How we found our Ideal Customer Profile
    • Tell me about features, not benefits
    • The magic of a Hacker News Pre-Mortem
    • How to run a transparent startup
    • How we justified quitting our jobs and financing PostHog early on
    • How we made something people want
    • Moving to San Francisco
    • Pivot to PostHog
    • Counterintuitive lessons about our pricing
    • I used to think you don't need product people. I was wrong.
    • How we raised $3M for an open source project
    • A story about pivots
    • The YC Interview
    • Raising money is less stressful than bootstrapping
    • What motivates me as a CEO
    • The really important job interview questions engineers should ask (but don't)
    • Writing for developers
    • Reflecting on YC, 2 years on
  • Company & culture
    • How we do meetings at PostHog
  • Comparisons
    • PostHog vs Matomo
    • PostHog vs Amplitude
    • Why I ditched Google Analytics and Mixpanel for PostHog
  • Engineering
    • Enabling zero downtime data migrations for self-hosted users
    • Automating a software company with GitHub Actions
    • How to speed up ClickHouse queries using materialized columns
    • In-depth: ClickHouse vs PostgreSQL
    • Setting up super fast Cypress tests on GitHub Actions
    • How I learned to love feedback loops (and make better products)
    • Frontend filters & backend SQL - A chat with Eric Duong, Sam Winslow, James Greenhill, and Buddy Williams
    • PostHog Joins Hacktoberfest 2020
    • How PostHog built an app server (from MVP to billions of events)
    • How we’re making PostHog deployments easier
    • Solving the mystery of PostHog’s missing session recordings
    • I used to think you don't need product people. I was wrong.
    • The secrets of PostHog query performance
    • Benchmarking the impact of session recording on performance
    • The state of plugins on PostHog
    • We ship whenever
  • General
    • Setting up super fast Cypress tests on GitHub Actions
    • How we designed the PostHog mascot
    • Why you may not need a sales team
    • A story about pivots
  • Guides
    • Introduction to self-service analytics
    • Building an AARRR pirate funnel (how and why)
    • 5 essential tips for Customer Success teams on PostHog
    • 5 analytics ideas for marketing teams using PostHog
    • Automating a software company with GitHub Actions
    • The most useful B2B SaaS product metrics
    • The 7 best GDPR-compliant analytics tools
    • The best HIPAA-compliant A/B testing tools
    • The 5 best free and open-source A/B testing tools
    • The 4 best HIPAA-compliant analytics tools
    • The best open-source analytics and data tools
    • Open source (and self-hosted) alternatives to Hotjar & FullStory
    • The two ways to estimate your monthly event usage
    • How to speed up ClickHouse queries using materialized columns
    • In-depth: ClickHouse vs PostgreSQL
    • Google is about to make it a lot harder to track website and app users without third-party cookies
    • Setting up super fast Cypress tests on GitHub Actions
    • 5 essential PostHog apps for new users
    • 5 events all teams should track with PostHog
    • What launching Experimentation taught us about running effective A/B tests
    • How to get the first 10 paying customers for your devtool company (and other customer acquisition tips)
    • The best GA4 alternatives for apps and websites
    • How to harness the awesome power of growth loops
    • What is user segmentation?
    • How to measure product engagement
    • How to achieve B2B product market fit
    • How to work out what your users really need
    • How we do hiring & HR at PostHog
    • How we turned ClickHouse into our event mansion
    • An introduction to customer retention
    • Is Google Analytics HIPAA compliant?
    • Finding your North Star metric and why it matters
    • How we monetized our open source devtool
    • Building an open source data stack
    • How to plan a killer company offsite in just 8 weeks
    • Permissions and projects in PostHog, explained
    • How (and why) our marketing team uses PostHog
    • PostHog vs Matomo
    • PostHog vs Amplitude
    • Product engineer vs software engineer: what's the difference?
    • Don’t bother securing your trademarks in the beginning
    • How to seed, grow, and scale Developer Relations (and how we're doing it at PostHog)
    • The ops toolkit for early-stage startups
    • How (and why) to track your website with PostHog
    • 22 ways PostHog makes it easier to build great products
    • What is a product engineer (and why they're awesome)
    • A simple guide to personal data and PII
    • An introduction to product analytics and how it works
    • What is SSO and why you should enable it for PostHog
    • The 3 critical reasons companies choose self-hosted analytics
  • HogMail
    • HogMail #14
    • HogMail #15
    • HogMail #16
    • HogMail #17: The personal traits that can't be taught
    • HogMail #18: What can SaaS learn from the New York Times?
  • Inside PostHog
    • PostHog raises $15 million Series B for open source product analytics
    • A non-coders thoughts on ‘Everybody Codes’ - Part Two
    • A non-coder's thoughts on an 'Everybody Codes' culture
    • After the HN launch
    • Remote companies can be too asynchronous
    • The time before YC
    • How PostHog uses Wren to offset carbon emissions during offsites
    • Winning from the back - late mover advantage
    • Optimize for not breaking up with your co-founder
    • Cancer and revenue - the latest board meeting
    • "How come your website is so nice?"
    • Things I learned last year
    • Our new objective: Nail Self Serve
    • How we found our Ideal Customer Profile
    • How we do customer support at our open source devtool company
    • The importance of dogfooding - Why product managers should use their product as much as their users
    • How we designed the PostHog mascot
    • Using Gatsby and Puppeteer to create dynamic Open Graph images
    • Creating an employee-friendly startup share option scheme
    • Tell me about features, not benefits
    • How I learned to love feedback loops (and make better products)
    • The magic of a Hacker News Pre-Mortem
    • HostHogs - free drinks, free pizza and frequently asked questions
    • How to run a transparent startup
    • How we do hiring & HR at PostHog
    • How PostHog built an app server (from MVP to billions of events)
    • How we turned ClickHouse into our event mansion
    • How we justified quitting our jobs and financing PostHog early on
    • Introducing Phil Leggetter, our new head of Developer Relations
    • Using Google Analytics was deemed 'illegal' in some EU countries. We built a microsite in 48 hours to capitalize on the news.
    • Introducing Joe Martin - Our first Product Marketer
    • How we made something people want
    • How we do meetings at PostHog
    • Solving the mystery of PostHog’s missing session recordings
    • Moving to San Francisco
    • How PostHog's new VP focused the company on nailing funnels in his first week
    • An engineer's guide to picking a cofounder
    • Pivot to PostHog
    • How to plan a killer company offsite in just 8 weeks
    • PostHog raises $12 million in funding led by GV and Y Combinator
    • What we learned about hiring from our first five employees
    • How (and why) our marketing team uses PostHog
    • How we rebranded PostHog in four weeks - a postmortem
    • Counterintuitive lessons about our pricing
    • I used to think you don't need product people. I was wrong.
    • What's the true role of a product team at an engineering-led organization?
    • Building an all-remote company from scratch
    • How we raised $3M for an open source project
    • All the cool things we built at our Rome hackathon
    • Content marketing strategy for devtool companies - How we do it at PostHog
    • How to seed, grow, and scale Developer Relations (and how we're doing it at PostHog)
    • Benchmarking the impact of session recording on performance
    • Speeding up PostHog builds with Depot
    • How to run finance at your startup without hiring a finance person
    • How to choose job titles in your early stage startup
    • Startups, stop treating engineers like a different species
    • The ops toolkit for early-stage startups
    • A story about pivots
    • The YC Interview
    • Why we ditched ‘talk to sales’ for transparent pricing
    • Raising money is less stressful than bootstrapping
    • What motivates me as a CEO
    • The really important job interview questions engineers should ask (but don't)
    • Why I ditched Google Analytics and Mixpanel for PostHog
    • Why infrastructure is a competitive advantage for us
    • Why we raised a $15m Series B ahead of schedule
    • Writing for developers
    • Reflecting on YC, 2 years on
    • YC adds PostHog to top valued companies for July 2021
  • Launch week
    • Introducing Collaboration for PostHog
    • Introducing Data Management for PostHog
    • What launching Experimentation taught us about running effective A/B tests
    • How we’re making PostHog deployments easier
    • PostHog Launch Week I: A Universe of New Features
    • The secrets of PostHog query performance
  • Open source
    • The Early Days of GitLab - A Chat with Sid Sijbrandij
    • The 5 best free and open-source A/B testing tools
    • The 6 best free and open-source feature flag tools
    • The best open-source analytics and data tools
    • Open source (and self-hosted) alternatives to Hotjar & FullStory
    • How we do customer support at our open source devtool company
    • How I learned to love feedback loops (and make better products)
    • PostHog Joins Hacktoberfest 2020
    • Give Back Friday with PostHog
    • Building an open source data science publishing platform - An interview with Datapane CEO, Leo Anthias
    • How we monetized our open source devtool
    • Open source is eating SaaS
    • Building an open source data stack
    • Should open source projects track you?
    • PostHog vs Amplitude
    • How we raised $3M for an open source project
    • Why open-source projects are essential for large businesses
    • Send love to open-source projects on Valentine's Day
    • Speeding up PostHog builds with Depot
    • The 3 critical reasons companies choose self-hosted analytics
  • PostHog Academy
    • What is user segmentation?
    • How to measure product engagement
    • How to achieve B2B product market fit
    • How to work out what your users really need
    • An introduction to customer retention
    • An introduction to product analytics and how it works
  • Privacy
    • The 7 best GDPR-compliant analytics tools
    • The best HIPAA-compliant A/B testing tools
    • The 4 best HIPAA-compliant analytics tools
    • Google is about to make it a lot harder to track website and app users without third-party cookies
    • A new 'Privacy Shield' won't solve big tech's GDPR problem
    • Is Google Analytics HIPAA compliant?
    • A simple guide to personal data and PII
  • Product analytics
    • Introduction to self-service analytics
    • Building an AARRR pirate funnel (how and why)
    • The two ways to estimate your monthly event usage
    • How to harness the awesome power of growth loops
    • What is user segmentation?
    • How to measure product engagement
    • How to achieve B2B product market fit
    • How to work out what your users really need
    • An introduction to customer retention
    • Is autocapture ‘still’ bad?
    • Finding your North Star metric and why it matters
    • How PostHog's new VP focused the company on nailing funnels in his first week
    • What's the true role of a product team at an engineering-led organization?
    • How to turn your engineers into product people
    • 22 ways PostHog makes it easier to build great products
    • An introduction to product analytics and how it works
  • Product updates
    • Why we're giving away 100 times more cloud usage, free
    • Enabling zero downtime data migrations for self-hosted users
    • Introducing the Avo Inspector app
    • We just made PostHog Open Source 1000x more scalable via ClickHouse
    • Introducing Collaboration for PostHog
    • Introducing Data Management for PostHog
    • What launching Experimentation taught us about running effective A/B tests
    • Group Analytics is now available in PostHog
    • You can now reverse ETL into PostHog with Hightouch
    • How we’re making PostHog deployments easier
    • PostHog Launch Week I: A Universe of New Features
    • How we’re improving performance by combining persons and events
    • PostHog teams up with Altinity
    • Introducing PostHog Cloud EU
    • Restack joins the PostHog Marketplace
    • PostHog is now available on Segment!
    • The secrets of PostHog query performance
    • Why we're removing the sessions page
    • Array 1.0.10
    • Array 1.0.11
    • Array 1.0.8
    • Array 1.0.9
    • Array 1.1.0
    • Array 1.11.0
    • Array 1.10.0
    • Array 1.12.0
    • Array 1.13.0
    • Array 1.14.0
    • Array 1.15.0
    • Array 1.16.0
    • Array 1.17.0
    • Array 1.18.0
    • Array 1.2.0
    • Array 1.19.0
    • Array 1.20.0
    • Array 1.22.0
    • Array 1.21.0
    • Array 1.23.0
    • Array 1.24.0
    • Array 1.25.0
    • Array 1.27.0
    • Array 1.28.0
    • Array 1.29.0
    • Array 1.26.0
    • Array 1.3.0
    • Array 1.30.0
    • Array 1.31.0
    • Array 1.32.0
    • Array 1.33.0
    • Array 1.34.0
    • Array 1.35.0: Introducing SAML, world map view and new plugins
    • Array 1.37.0: Cohorts 2.0 and event & property detail pages
    • Array 1.36.0: Introducing AND/OR filtering, timezone support and universal search
    • Array 1.38.0: Exports, subscriptions and session analysis
    • Array 1.39.0: Betas, persons, events and libraries
    • Array 1.4.0
    • Array 1.40.0: Interface improvements and more!
    • Array 1.42.0: Get beta features via our roadmap!
    • Array 1.5.0
    • Array 1.41.0: Improving performance by up to 400%
    • Array 1.6.0
    • Array 1.7.0
    • Array 1.8.0
    • Array 1.9.0
    • Array 1.0.0
    • The state of plugins on PostHog
  • Release notes
    • Introducing the Avo Inspector app
    • How we’re improving performance by combining persons and events
    • Array 1.0.10
    • Array 1.0.11
    • Array 1.0.8
    • Array 1.0.9
    • Array 1.1.0
    • Array 1.11.0
    • Array 1.10.0
    • Array 1.12.0
    • Array 1.13.0
    • Array 1.14.0
    • Array 1.15.0
    • Array 1.16.0
    • Array 1.17.0
    • Array 1.18.0
    • Array 1.2.0
    • Array 1.19.0
    • Array 1.20.0
    • Array 1.22.0
    • Array 1.21.0
    • Array 1.23.0
    • Array 1.24.0
    • Array 1.25.0
    • Array 1.27.0
    • Array 1.28.0
    • Array 1.29.0
    • Array 1.26.0
    • Array 1.3.0
    • Array 1.30.0
    • Array 1.31.0
    • Array 1.32.0
    • Array 1.33.0
    • Array 1.34.0
    • Array 1.35.0: Introducing SAML, world map view and new plugins
    • Array 1.37.0: Cohorts 2.0 and event & property detail pages
    • Array 1.36.0: Introducing AND/OR filtering, timezone support and universal search
    • Array 1.38.0: Exports, subscriptions and session analysis
    • Array 1.39.0: Betas, persons, events and libraries
    • Array 1.4.0
    • Array 1.40.0: Interface improvements and more!
    • Array 1.42.0: Get beta features via our roadmap!
    • Array 1.5.0
    • Array 1.41.0: Improving performance by up to 400%
    • Array 1.6.0
    • Array 1.7.0
    • Array 1.8.0
    • Array 1.9.0
    • Array 1.0.0
  • Startups
    • A non-coder's thoughts on an 'Everybody Codes' culture
    • How we found our Ideal Customer Profile
    • Creating an employee-friendly startup share option scheme
    • How to get the first 10 paying customers for your devtool company (and other customer acquisition tips)
    • How to run a transparent startup
    • Building an open source data science publishing platform - An interview with Datapane CEO, Leo Anthias
    • How we made something people want
    • How we monetized our open source devtool
    • Should open source projects track you?
    • An engineer's guide to picking a cofounder
    • How to plan a killer company offsite in just 8 weeks
    • What we learned about hiring from our first five employees
    • How we rebranded PostHog in four weeks - a postmortem
    • Product engineer vs software engineer: what's the difference?
    • What's the true role of a product team at an engineering-led organization?
    • Why you may not need a sales team
    • Don’t bother securing your trademarks in the beginning
    • Building an all-remote company from scratch
    • All the cool things we built at our Rome hackathon
    • Content marketing strategy for devtool companies - How we do it at PostHog
    • Why open-source projects are essential for large businesses
    • How to run finance at your startup without hiring a finance person
    • How to choose job titles in your early stage startup
    • Startups, stop treating engineers like a different species
    • The ops toolkit for early-stage startups
    • How to turn your engineers into product people
    • Raising money is less stressful than bootstrapping
    • What is a product engineer (and why they're awesome)
    • Writing for developers
    • Reflecting on YC, 2 years on
  • Using PostHog
    • 5 essential tips for Customer Success teams on PostHog
    • 5 analytics ideas for marketing teams using PostHog
    • 5 essential PostHog apps for new users
    • 5 events all teams should track with PostHog
    • Permissions and projects in PostHog, explained
    • How (and why) our marketing team uses PostHog
    • How (and why) to track your website with PostHog
    • What is SSO and why you should enable it for PostHog
  • Home
  • CEO diaries
    • After the HN launch
    • Remote companies can be too asynchronous
    • The time before YC
    • Winning from the back - late mover advantage
    • Optimize for not breaking up with your co-founder
    • Cancer and revenue - the latest board meeting
    • "How come your website is so nice?"
    • Things I learned last year
    • Our new objective: Nail Self Serve
    • How we found our Ideal Customer Profile
    • Tell me about features, not benefits
    • The magic of a Hacker News Pre-Mortem
    • How to run a transparent startup
    • How we justified quitting our jobs and financing PostHog early on
    • How we made something people want
    • Moving to San Francisco
    • Pivot to PostHog
    • Counterintuitive lessons about our pricing
    • I used to think you don't need product people. I was wrong.
    • How we raised $3M for an open source project
    • A story about pivots
    • The YC Interview
    • Raising money is less stressful than bootstrapping
    • What motivates me as a CEO
    • The really important job interview questions engineers should ask (but don't)
    • Writing for developers
    • Reflecting on YC, 2 years on
  • Company & culture
    • How we do meetings at PostHog
  • Comparisons
    • PostHog vs Matomo
    • PostHog vs Amplitude
    • Why I ditched Google Analytics and Mixpanel for PostHog
  • Engineering
    • Enabling zero downtime data migrations for self-hosted users
    • Automating a software company with GitHub Actions
    • How to speed up ClickHouse queries using materialized columns
    • In-depth: ClickHouse vs PostgreSQL
    • Setting up super fast Cypress tests on GitHub Actions
    • How I learned to love feedback loops (and make better products)
    • Frontend filters & backend SQL - A chat with Eric Duong, Sam Winslow, James Greenhill, and Buddy Williams
    • PostHog Joins Hacktoberfest 2020
    • How PostHog built an app server (from MVP to billions of events)
    • How we’re making PostHog deployments easier
    • Solving the mystery of PostHog’s missing session recordings
    • I used to think you don't need product people. I was wrong.
    • The secrets of PostHog query performance
    • Benchmarking the impact of session recording on performance
    • The state of plugins on PostHog
    • We ship whenever
  • General
    • Setting up super fast Cypress tests on GitHub Actions
    • How we designed the PostHog mascot
    • Why you may not need a sales team
    • A story about pivots
  • Guides
    • Introduction to self-service analytics
    • Building an AARRR pirate funnel (how and why)
    • 5 essential tips for Customer Success teams on PostHog
    • 5 analytics ideas for marketing teams using PostHog
    • Automating a software company with GitHub Actions
    • The most useful B2B SaaS product metrics
    • The 7 best GDPR-compliant analytics tools
    • The best HIPAA-compliant A/B testing tools
    • The 5 best free and open-source A/B testing tools
    • The 4 best HIPAA-compliant analytics tools
    • The best open-source analytics and data tools
    • Open source (and self-hosted) alternatives to Hotjar & FullStory
    • The two ways to estimate your monthly event usage
    • How to speed up ClickHouse queries using materialized columns
    • In-depth: ClickHouse vs PostgreSQL
    • Google is about to make it a lot harder to track website and app users without third-party cookies
    • Setting up super fast Cypress tests on GitHub Actions
    • 5 essential PostHog apps for new users
    • 5 events all teams should track with PostHog
    • What launching Experimentation taught us about running effective A/B tests
    • How to get the first 10 paying customers for your devtool company (and other customer acquisition tips)
    • The best GA4 alternatives for apps and websites
    • How to harness the awesome power of growth loops
    • What is user segmentation?
    • How to measure product engagement
    • How to achieve B2B product market fit
    • How to work out what your users really need
    • How we do hiring & HR at PostHog
    • How we turned ClickHouse into our event mansion
    • An introduction to customer retention
    • Is Google Analytics HIPAA compliant?
    • Finding your North Star metric and why it matters
    • How we monetized our open source devtool
    • Building an open source data stack
    • How to plan a killer company offsite in just 8 weeks
    • Permissions and projects in PostHog, explained
    • How (and why) our marketing team uses PostHog
    • PostHog vs Matomo
    • PostHog vs Amplitude
    • Product engineer vs software engineer: what's the difference?
    • Don’t bother securing your trademarks in the beginning
    • How to seed, grow, and scale Developer Relations (and how we're doing it at PostHog)
    • The ops toolkit for early-stage startups
    • How (and why) to track your website with PostHog
    • 22 ways PostHog makes it easier to build great products
    • What is a product engineer (and why they're awesome)
    • A simple guide to personal data and PII
    • An introduction to product analytics and how it works
    • What is SSO and why you should enable it for PostHog
    • The 3 critical reasons companies choose self-hosted analytics
  • HogMail
    • HogMail #14
    • HogMail #15
    • HogMail #16
    • HogMail #17: The personal traits that can't be taught
    • HogMail #18: What can SaaS learn from the New York Times?
  • Inside PostHog
    • PostHog raises $15 million Series B for open source product analytics
    • A non-coders thoughts on ‘Everybody Codes’ - Part Two
    • A non-coder's thoughts on an 'Everybody Codes' culture
    • After the HN launch
    • Remote companies can be too asynchronous
    • The time before YC
    • How PostHog uses Wren to offset carbon emissions during offsites
    • Winning from the back - late mover advantage
    • Optimize for not breaking up with your co-founder
    • Cancer and revenue - the latest board meeting
    • "How come your website is so nice?"
    • Things I learned last year
    • Our new objective: Nail Self Serve
    • How we found our Ideal Customer Profile
    • How we do customer support at our open source devtool company
    • The importance of dogfooding - Why product managers should use their product as much as their users
    • How we designed the PostHog mascot
    • Using Gatsby and Puppeteer to create dynamic Open Graph images
    • Creating an employee-friendly startup share option scheme
    • Tell me about features, not benefits
    • How I learned to love feedback loops (and make better products)
    • The magic of a Hacker News Pre-Mortem
    • HostHogs - free drinks, free pizza and frequently asked questions
    • How to run a transparent startup
    • How we do hiring & HR at PostHog
    • How PostHog built an app server (from MVP to billions of events)
    • How we turned ClickHouse into our event mansion
    • How we justified quitting our jobs and financing PostHog early on
    • Introducing Phil Leggetter, our new head of Developer Relations
    • Using Google Analytics was deemed 'illegal' in some EU countries. We built a microsite in 48 hours to capitalize on the news.
    • Introducing Joe Martin - Our first Product Marketer
    • How we made something people want
    • How we do meetings at PostHog
    • Solving the mystery of PostHog’s missing session recordings
    • Moving to San Francisco
    • How PostHog's new VP focused the company on nailing funnels in his first week
    • An engineer's guide to picking a cofounder
    • Pivot to PostHog
    • How to plan a killer company offsite in just 8 weeks
    • PostHog raises $12 million in funding led by GV and Y Combinator
    • What we learned about hiring from our first five employees
    • How (and why) our marketing team uses PostHog
    • How we rebranded PostHog in four weeks - a postmortem
    • Counterintuitive lessons about our pricing
    • I used to think you don't need product people. I was wrong.
    • What's the true role of a product team at an engineering-led organization?
    • Building an all-remote company from scratch
    • How we raised $3M for an open source project
    • All the cool things we built at our Rome hackathon
    • Content marketing strategy for devtool companies - How we do it at PostHog
    • How to seed, grow, and scale Developer Relations (and how we're doing it at PostHog)
    • Benchmarking the impact of session recording on performance
    • Speeding up PostHog builds with Depot
    • How to run finance at your startup without hiring a finance person
    • How to choose job titles in your early stage startup
    • Startups, stop treating engineers like a different species
    • The ops toolkit for early-stage startups
    • A story about pivots
    • The YC Interview
    • Why we ditched ‘talk to sales’ for transparent pricing
    • Raising money is less stressful than bootstrapping
    • What motivates me as a CEO
    • The really important job interview questions engineers should ask (but don't)
    • Why I ditched Google Analytics and Mixpanel for PostHog
    • Why infrastructure is a competitive advantage for us
    • Why we raised a $15m Series B ahead of schedule
    • Writing for developers
    • Reflecting on YC, 2 years on
    • YC adds PostHog to top valued companies for July 2021
  • Launch week
    • Introducing Collaboration for PostHog
    • Introducing Data Management for PostHog
    • What launching Experimentation taught us about running effective A/B tests
    • How we’re making PostHog deployments easier
    • PostHog Launch Week I: A Universe of New Features
    • The secrets of PostHog query performance
  • Open source
    • The Early Days of GitLab - A Chat with Sid Sijbrandij
    • The 5 best free and open-source A/B testing tools
    • The 6 best free and open-source feature flag tools
    • The best open-source analytics and data tools
    • Open source (and self-hosted) alternatives to Hotjar & FullStory
    • How we do customer support at our open source devtool company
    • How I learned to love feedback loops (and make better products)
    • PostHog Joins Hacktoberfest 2020
    • Give Back Friday with PostHog
    • Building an open source data science publishing platform - An interview with Datapane CEO, Leo Anthias
    • How we monetized our open source devtool
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The really important job interview questions engineers should ask (but don't)

  • James Hawkins
    James Hawkins

Since we started PostHog, our team has interviewed 725 people.

What's one thing I've taken from this?

It's normal for candidates not to ask harder questions about our company, so they usually miss out on a chance to (i) de-risk our company's performance and (ii) to increase the chances they'll like working here.

This isn't desirable. People should be able to reduce the chances they end up in a situation like this, or this.

Disclaimer: These questions are direct, but a company that reacts badly to them may not be a good place to work. There are also a lot of questions here - think of them as themes, and you don't need to ask them all. Prioritize based on what you hear through the process.

If I were job hunting, these are the themes I'd be interested in – it's skewed towards (i) startup / early growth software companies, (ii) engineers and (iii) interviews with founders (I am one), but the concepts feel like they'd be useful beyond that.

Does the company have product-market fit?

This is the single most important thing a company can do to survive and grow.

  • "Do you ever question if you have product-market fit?"
  • "When did you reach product-market fit? How did you know?"
  • "What do you need to do to get to product-market fit?"
  • "What's your revenue? What was it a year ago?"
  • "How many daily active users do you have?"

It's ok if these answers show you the founder doesn't have product market fit. In this case, figure out if they will get to a yes. Unless you want to join a sinking ship, of course!

Early stage founders are (or should be) super-mega-extra-desperately keen to have product-market fit – it's all that really matters. The ones that will succeed are those that are honest about this (or those that have it already) and are prioritizing it. Many will think or say (intentionally or through self-delusion) that they have it when they don't.

Low user or revenue numbers and vague answers to the example questions above are a sign that it isn't there. Product-market fit is very obvious.

Avoid:

  • Founders who aren't spending a ton of time talking and selling to users pre-product-market fit – it's a flag to attempt to outsource/delegate this

  • Companies where you don't understand the product or its benefits – if it can't be explained to you, others will struggle

  • Solutions looking for a problem

If there is no product-market fit, but you think the team could find it, it's very important the company has lots of runway (it'll be hard to raise more money without product-market fit, so time to find it is crucial), doesn't have a huge team (it's harder to make rapid changes in direction with a lot of people), and moves fast (look out for bureaucracy, management, or a team that can't work well with ambiguity).

How much runway does the company have? Does their spending look within reason?

  • "Are you default alive?"

This means that the company whilst not profitable, is growing fast enough that it will become profitable ahead of running out of money.

This means:

  • Avoid companies that don't know if they're default alive or don't care about it, given the current climate – this may change in an easier fundraising environment for early stage, capital-intense business models

  • Avoid companies that you don't believe could get to default alive because they don't have enough time or are too slow to get things done

There are exceptions. For example, very low revenue numbers may lead to unrealistic growth rates – if I went from $1 to $2 of revenue yesterday, I'd be pretty darn rich if I kept that growth rate up.

  • "What's your runway?"
  • "What assumptions are you making to calculate this?"
  • "What are your fundraising plans?"

If a company doesn't have product-market fit, spending should be minimal so there's as much time as possible to find it. Spending a lot and having a big team just makes it harder to change direction rapidly.

If a company has strong product-market fit and has a ton of traction, a shorter runway is ok.

Avoid:

  • Companies that assume wild increases in revenue to survive, within a short timeframe

  • Companies that are fundraising as they'll otherwise run out of money, but haven't closed the round

What's the culture like?

  • "What are the company values, and why? Can you give me some specific ways you've followed them?"
  • "Who decides what to build?"
  • "What does a typical workday look?"
  • "What are the things or behaviors that would cause a person in this role to fail?"

We get the above a bit more often, they're good questions.

How strong is the team?

  • "Can you tell me about the team I'd be working with most closely?"
  • "How do you compensate the team?"
  • "How do you attract and retain really strong hires?"
  • "Do you share board slides with the team?"

If you want to learn in this role ask yourself: do you believe this company is able to attract people who are as good as or better than you?

You are trying to understand if they view engineering as a cost center (aka a higher chance you'll be miserable there!) or not. Thoughtful answers to how to hire and pay people indicate this is prioritized. Sharing more information rather than less shows trust and partnership with employees.

What's in store in the future?

  • "What motivates you?"
  • "What are you most proud of so far?"
  • "Do you plan to sell the company?"

You can't guarantee that plans won't change, but this gives you some indication of what is in store and it helps you understand the founders' motivation better.

  • "What's the company strategy and why?"

You are looking for a simple answer - otherwise the company and the product will end up a bit of a mess. At PostHog, we define strategy as simply "Nail X", where X is the thing we need to nail. We're currently focused on Nail Self Serve.

  • "How do you and the other founders avoid falling out?"

One of the most common ways for an early stage company to die is that the founders break up. Hopefully they've put some proactive thought into their relationship.

  • "What keeps you up at night?"

This will reveal perhaps what the hardest challenge will be, and where you could add the most value if you joined

Be reasonable, but buyer beware

Startups do not have everything figured out. The challenge is figuring out if they can get from where they are today to where they need to be to succeed – just don't shy away from asking to see if they're headed in the right direction.

Author

  • James Hawkins
    James Hawkins

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  • CEO diaries
  • Inside PostHog

Jun 22, 2022

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