Software Engineer (AI Start-Up) - Up to £140k + Bonus + Equity

**Job Title:** Software Engineer (AI Start\-Up) \- Typescript/React **Client:** AI Tech Scale\-Up – Backed by Top\-Tier Investors, Led by World\-Class Engineers **Salary:** Up to £140k \+ Bonus \+ Equity **Location:** London **Sells:** Work on cutting\-edge AI systems that power innovation at scale led by world class engineers (Competitive programmers, ex HFT, big tech etc.) . Total ownership of greenfield projects, modern tech stack (Typescript/React), and a culture that rewards curiosity, autonomy, and clean engineering. An **AI Tech company** is expanding its high\-calibre engineering team and looking for **Software Engineers** who thrive on building elegant, scalable systems from the ground up. You’ll be joining a small, world\-class team working on distributed backend and frontend platforms, data\-driven AI tools, and core infrastructure supporting advanced technologies. This is a true software engineering role where you'll be designing, building, and scaling complex systems that solve real problems! **Role** * Design and build production\-grade backend systems using **Typescript and React** * Develop distributed, high\-performance services and APIs for AI\-driven platforms * Contribute to architecture decisions, scalability planning, and system optimisation * Implement best practices in testing, CI/CD, and performance monitoring * Collaborate closely with product, AI, and data teams to deliver end\-to\-end solutions * Drive continuous improvement and innovation across the engineering organisation **Skills** * 4\+ years of experience as a **Software Engineer** building modern backend systems * Strong **Typescript** skills * Knowledge of system design, data modelling, and distributed architecture * Understanding of **software engineering best practices** — testing, CI/CD, clean code * A genuine interest in AI systems, automation, and applying engineering to real\-world impact **Sells** * Chance to shape core architecture in a high\-impact Tech environment * Flat, engineering\-led structure with autonomy and trust * Work on complex, meaningful technical problems that matter * Strong equity offering and long\-term growth opportunities * Culture built around innovation, ownership, and collaboration