Senior Software Engineer (C# / JavaScript)

Senior Software Engineer Location: London (Hybrid / On-site) We’re working with an early-stage, venture-backed legal technology startup on a mission to transform one of the UK’s most broken consumer experiences: the legal process behind property transactions. This market is large, fragmented, and outdated, with high failure rates, poor transparency, and processes still reliant on manual workflows. The company is building the UK’s first AI-native law firm , starting with property transactions and scaling towards a full-service, AI-first legal platform with global ambitions. That experience provides a strong foundation for navigating regulation while moving quickly in a traditionally slow industry. From day one, you’ll have significant ownership, shaping product direction, shipping to production quickly, and working directly with users to define what should be built. Build and ship production features from your first week Help define product strategy in an ambiguous, fast-moving environment Design and scale TypeScript-based systems across the stack Build AI-powered workflows and agent-based systems that go beyond basic prompting Think in terms of user problems, not just technical implementations Have scaled and maintained complex TypeScript codebases Actively experiment with and refine AI-assisted development workflows Have built LLM-powered systems or AI agents in production environments TypeScript monorepo React, tRPC, Tailwind 100,000 – £150,000 base salary (depending on experience) ~ 5% employer pension contribution ~ Private medical cover (including dental and optical) ~25 days holiday plus bank holidays ~ Choice of AI tooling ~