Summary
✨ AI‑Generated
A profitable, data-focused technology business is looking for a Senior Backend Engineer to own the architecture, performance, and quality of a Python and FastAPI backend. You will optimize PostgreSQL and ClickHouse workloads over billions of rows, build infrastructure for AI-driven and real-time experiences, establish clean integrations with frontend and data systems, and make architectural decisions that keep the platform fast and extensible.
Highlights
High ownership over backend architecture, performance, and quality in a profitable data-focused business. The role involves building AI and real-time capabilities, optimizing queries across very large datasets, defining clean system boundaries, and shaping the next generation of product experiences.
Description
My client is a bootstrapped, profitable data business whose product is used every day by hundreds of VC and PE firms to find and evaluate private companies.
The backend that carries all of it now needs a senior owner, as the team builds a new generation of AI and real-time features on top of a data foundation they've spent years getting right.
What you'll do
Own the architecture, performance and quality of the Python and FastAPI backend that every client-facing surface and internal tool runs onMake Postgres and ClickHouse queries fast across billions of rows, so the product feels instant no matter how much data sits behind itBuild the backend for the next wave of product experiences: AI agents, network tracking and deep-search workflowsSet clean integration boundaries with the RemixJS frontend and the data pipelines, so the rest of the team can ship at speed on top of youDecide what needs to exist for the system to stay fast and easy to extend, and then build it, without waiting for a spec
What we're looking for:
Strong Python, with FastAPI, Django or another async framework in productionSolid SQL and Postgres, and genuine interest in query performance and database internalsProduction APIs you've designed and shipped that other teams depended onA track record of building end-to-end and moving fast, rather than owning one narrow serviceExperience at a startup or a company going through the scale-up transitionHigh agency.
You spot what matters and pick it up yourself
Nice to have: ClickHouse or another column store such as Redshift or Snowflake; experience in a data-intensive product, where the problems are a different shape; comfort dropping into frontend work when it's the fastest route; TypeScript or RemixJS; mentoring or leading engineers; infra and DevOps; familiarity with modern data stacks.
What's on offer
£110,000 to £135,000 base, plus a discretionary year-end bonusLondon preferred, remote considered for the right personA small team where you'd be the senior backend voice, working directly with the people building the AI features and the frontendA bootstrapped, profitable business investing in growth, so the roadmap isn't hostage to a funding roundFour-stage process: intro chat, collaborative technical interview, second technical interview, final team conversation
Apply here or message me directly!
