> Markdown version of [/jobs/ext/4162530-founding-software-engineer-python-start-up](https://www.wearedevelopers.com/jobs/ext/4162530-founding-software-engineer-python-start-up). 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). --- # Founding Software Engineer Python - Start-up - **Company:** Client Server - **Location:** London, UK (Remote available) - **Salary:** £115,000.0 - **Contract:** Permanent contract - **Skills:** HTML5, Cascading Style Sheets (CSS), Python (Programming Language), Software Engineering, TypeScript, ReactJS, Large Language Models, Agentic-AI, Fastapi, Information Technology, Web Technologies, Restful APIs - **Published:** October 15, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=dd4f536c7156745b ## About the Role * You enjoy taking ownership and can build software from scratch and iterate quickly * You have strong technical skills, primarily with Python * You have experience with RESTful APIs (the company uses FastAPI); experience with TypeScript, React and other web technologies such as HTML5 and CSS3 would be beneficial * You have experience with LLMs and agentic AI, enjoy a hands-on approach and have a proactive, entrepreneurial spirit * You're curious by nature and happy to learn and pick up new things * You're keen to work in a start-up environment and are comfortable with unstructured environments * You're collaborative with great communication skills * You have a degree, ideally in Computer Science or a closely related discipline