> Markdown version of [/jobs/ext/2075405-senior-backend-engineer](https://www.wearedevelopers.com/jobs/ext/2075405-senior-backend-engineer). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Backend Engineer - **Company:** The French Sourcer - **Location:** London, UK (Remote available) - **Experience:** Expert - **Salary:** £75,133.0 - **Contract:** Permanent contract - **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Databases, Data Infrastructure, Data Retrieval, Relational Databases, Cursor (Graphical User Interface Elements), DevOps, Python (Programming Language), PostgreSQL, Standard Sql, Transaction Data, Large Language Models, Snowflake, Backend, Fastapi, Vertica, Amazon Redshift - **Published:** August 16, 2026 - **Apply:** https://www.adzuna.co.uk/jobs/details/5842569924 ## About the Role * 5 to 15 years of backend engineering experience, most of it in Python, in production environments * A track record of building and personally owning APIs or services used by real customers, not just maintaining systems someone else designed * Time spent at a startup or scaleup (roughly 30 to 100 people), not exclusively large corporate environments * Hands-on experience shipping AI or LLM features to production: agentic workflows, RAG, or tool use * Strong SQL and solid experience with PostgreSQL or an equivalent relational database * A genuine preference for staying hands-on and coding day to day rather than moving toward management * Based in Europe (outside France and the Nordics); if based in London, comfortable working from the office five days a week * Bonus: experience with columnar databases (ClickHouse, Redshift, Snowflake) or general DevOps/infrastructure skills ## Description * Building and shipping production backend services and APIs in Python (FastAPI) that power the platform's AI features, used daily by professional investors * Designing and owning the orchestration layer for agentic AI capabilities: how the system plans, calls tools, and retrieves the right data at the right time * Working directly with PostgreSQL and ClickHouse to enable fast, reliable data retrieval for AI-driven analysis at real scale * Taking a feature from a founder's rough idea to something live in production within the same sprint, without layers of process in between * Mentoring teammates and helping set engineering standards as the team grows from around seven engineers today to over thirty * Making real calls on architecture and tooling rather than inheriting decisions frozen in place years ago * Working closely enough with the founders that your technical judgment shapes what gets built next, not just how it gets built Where it gets technically interesting * Agentic workflows and tool use sit on top of a data platform that has to stay fast and correct under real investor usage, not a demo * Two different database workloads in the same system: PostgreSQL for transactional data, ClickHouse for the columnar, analytics-heavy queries behind the AI insights * AI coding tools (Cursor, Claude) are part of the actual day-to-day workflow, not a side experiment * A genuinely small engineering team means no one else is quietly maintaining the parts you don't touch * Retrieval and embeddings work that has to hold up against messy, high-stakes private market data rather than clean public datasets ## Related Videos - [Shipping Faster with Less: Render on Cloud Hosting, AI Workloads, and the Future of DevOps](https://www.wearedevelopers.com/videos/1894-shipping-faster-with-less-render-on-cloud-hosting-ai-workloads-and-the-future-of-devops) - [Intro to FastAPI](https://www.wearedevelopers.com/videos/462-intro-to-fastapi) - [From DevOps to Scaled DevOps: How We’re Rebuilding Continuous Delivery as a Platform](https://www.wearedevelopers.com/videos/100018-from-devops-to-scaled-devops-how-we-re-rebuilding-continuous-delivery-as-a-platform) - [Inside Bitpanda's Tech Stack: Scaling a European Fintech Leader - Markus Dorner](https://www.wearedevelopers.com/videos/1979-inside-bitpanda-s-tech-stack-scaling-a-european-fintech-leader-markus-dorner) - [Building and Deploying Multi-Agent Systems with ADK and Vertex AI](https://www.wearedevelopers.com/videos/1918-building-and-deploying-multi-agent-systems-with-adk-and-vertex-ai) - [DevOps Maturity Check – a way to balance autonomy and alignment](https://www.wearedevelopers.com/videos/58-devops-maturity-check-a-way-to-balance-autonomy-and-alignment) ## Related Articles - [The 7 Most Popular Backend Frameworks for Developers](https://www.wearedevelopers.com/magazine/403-the-7-most-popular-backend-frameworks-for-developers) - [What’s the Difference Between Frontend and Backend Development?](https://www.wearedevelopers.com/magazine/240-what-s-the-difference-between-frontend-and-backend-development) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers) - [Why Upskilling And Reskilling is Important For Developers](https://www.wearedevelopers.com/magazine/428-why-upskilling-and-reskilling-is-important-for-developers) - [7 Most Popular Web Developer Jobs in Europe](https://www.wearedevelopers.com/magazine/163-7-most-popular-web-developer-jobs-in-europe)