AI Research Engineer

PostHog· Engineering / AI Research

Hybrid (London)$150k - $200kFull-timePosted 2mo ago

About the role

AI Research Engineer role at PostHog, hybrid-remote (London, UK) focusing on self-driving product, deep ML models, and productionizing AI features to surface insights from large-scale user data.

Responsibilities

Research what's next and what’s better and bring it into production.
Areas we’re exploring: session replay analysis, user behavior prediction, synthetic user testing.

Qualifications

A PhD is a plus, but a strong background in math is a must, or you have previous experience training models (strong math skills are still required).
Strong PyTorch experience.
Strong ability to code in Rust, CUDA, or C (preference for Rust).
Solid understanding of Transformers.
A product mindset. you’ll be building things!
Hybrid-remote position based out of our London office.

Skills

Required:PhD background or strong math foundationPyTorchRust / CUDA / CTransformersProduct mindset

Last updated Oct 21, 2026. Interested? Apply on the company site.

About PostHog

The single platform to analyze, test, observe, and deploy new features

PostHog helps engineers build better products. We provide everything they need to make sure they are building something that people want. This means - product analytics, session replays, feedback tools, feature flags, experimentation, LLM observability, and a data warehouse (with SQL) with one click data imports from the places you use. We've been averaging ~10% monthly revenue growth, we are [default alive](http://www.paulgraham.com/aord.html), and we didn't raised a huge / now-overpriced round in 2021. While others are focused on layoffs and struggling to grow into huge valuations, we're focusing on an awesome product for end users, hiring (a handful of) exceptional team members and seeing fantastic increases in revenue as a result. Check out posthog.com/careers if you want to be part of this journey.

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