AI Research Engineer

• Join the PostHog AI team working on product autonomy, where X should already be built for you before you even ask. • Work on a new team specifically for this purpose, closely with one of the founders. • Leverage PostHog's exceptionally large dataset of over a trillion data points across events, errors, session replays, and revenue data. • Help figure out which areas to prioritize as there are many possibilities for game-changing things to ship.

• Have either a strong background in maths and be able to code, or have worked on training models previously. • Be proactive, think for yourself, work fast, get product into users' hands, and learn. • Be comfortable working on something that is uncertain and may fail. • Be able to handle fast and intense work in a chaotic environment where technologies and ideas are changing rapidly.

• Have experience with fine-tuning and running models. • Have experience with LLM infrastructure and AI product development. • Have experience with MCP (Model Context Protocol) and agent-based systems.

• Train, fine-tune, and run models to deepen PostHog's ability to achieve product autonomy. • Help figure out which areas to prioritize among many possibilities for game-changing features. • Work on background agents that can fix bugs, listen to customer feedback, and ship improvements automatically. • Contribute to PostHog AI features including the AI-powered analyst that answers product questions and writes custom SQL queries. • Work on reliability improvements including LLM gateway and fallback providers. • Develop MCP tools and skills for the PostHog ecosystem. • Build enterprise features including HIPAA compliance and regional processing for GDPR/EU.

We have used PostHog's web analytics ourselves and genuinely loved the experience. The product is fast, thoughtfully designed, and surprisingly fun to use. PostHog is unlike most SaaS companies: their entire handbook is public, their codebase is open source, and they share revenue figures and board meeting notes with every team member. The company has raised $194M from investors, including Stripe, GV, and Y Combinator, reached a $1.4 billion valuation in 2025, and is targeting $100M in ARR by the end of 2026. They pay generously, benchmarking engineering salaries at the 90th percentile of San Francisco rates adjusted by location, with a fully public compensation calculator so you know your salary before you even apply. Employees on Glassdoor consistently highlight the flexible spending, genuine remote-first culture, and regular offsites, alongside a $1,500 quarterly budget for meeting up with colleagues anywhere in the world. Many team members are former founders, and the company is structured around small, autonomous teams that own their products end-to-end. If you are an engineer or builder who thrives on autonomy, ships fast, and wants to work on a product used by nearly 200,000 teams, PostHog is a rare opportunity.

• Receive generous, transparent compensation and significant equity. • Enjoy unlimited vacation with a minimum requirement. • Benefit from two meeting-free days per week. • Receive a home office budget. • Access coworking credit. • Get private health, dental, and vision insurance. • Access a training budget. • Enjoy access to the Hedge House. • Benefit from carbon offsetting. • Receive pension and 401k contributions. • Participate in company offsites. • Get paid $1,000 for the PostHog SuperDay interview.

PostHog is building the operating system for folks who build software. Starting with open-source product analytics and launching out of Y Combinator's W20 cohort, PostHog has shipped more than a dozen products including a built-in data warehouse, customer data platform, and PostHog AI. More than 100,000 companies have installed PostHog, driven mostly by word-of-mouth. The company has raised more than $100m from top investors and has around $150M in balance, running an exceptionally efficient business that has been scaling rapidly for 6 years.