Lead Software Engineer
22 hours ago
Sheffield
Job Title: Lead Software Engineer Location: United Kingdom Work Pattern: Fully remote (UK-based preferred) Salary: £80,000–£90,000 + Equity Job Position: Permanent This position does not offer sponsorship Our client is building the next generation of personal finance for the UK — think Cleo or Emma, but powered by real intelligence. Their app connects to users’ bank accounts via Open Banking and uses AI to analyse conversations and transactions to deliver hyper-personalised financial recommendations. They have built the foundations. Now they're looking for a hands-on, senior full-stack engineer to help us scale from MVP to a live, multi-featured consumer product and build the engineering team that will take us there. What You’ll Do • Own and evolve the product architecture — from Open Banking integrations to AI-driven recommendation systems., • Lead development of the mobile app (React Native) and backend (Node.js or Python/FastAPI)., • Integrate with Open Banking APIs (TrueLayer, Yapily, etc.) to securely connect and manage financial data., • Design and implement pipelines to analyse transaction data and user conversations using embeddings and vector databases (Pinecone, Qdrant, etc.)., • Ensure best practice in data security and compliance, including OAuth2, GDPR, and encrypted storage., • Collaborate closely with founders and product to shape features, scale infrastructure, and make technical decisions., • Play a key role in hiring and mentoring future engineers as we expand post-funding. Who You Are • A senior-level full-stack engineer (4–6 years’ experience) comfortable taking technical ownership in a fast-paced startup., • Proficient with React Native (or strong React + mobile experience)., • Backend experience with Node.js or Python (FastAPI/Django) and RESTful API design., • Experience integrating Open Banking APIs (TrueLayer, Yapily, Salt Edge, etc.)., • Hands-on experience with AI / LLM-powered systems — especially embedding models (OpenAI, Cohere, Sentence Transformers) and vector databases (Pinecone, Weaviate, FAISS, Chroma)., • Strong understanding of secure data practices and compliance standards., • Excellent communicator — able to translate complex technical ideas to non-technical founders., • Calm, methodical, and collaborative — a natural problem-solver who can manage multiple workstreams (features, tickets, AI, UX) simultaneously., • Experience in financial app development or working within regulated fintech environments is a big plus. Why Join • Be the technical backbone of a venture-backed fintech at a pivotal moment — scaling from MVP to live product., • Shape the engineering culture and help build a team around you post-funding., • Flexible structure — choose between higher salary/lower equity or vice versa., • Fully remote team (UK preferred) with occasional meetups in London., • Work alongside founders who value autonomy, communication, and long-term impact over quick fixes. Tech Stack Snapshot React Native • Node.js / FastAPI • TypeScript • PostgreSQL • Pinecone / Qdrant • OpenAI / Cohere APIs • TrueLayer / Yapily (Open Banking) • AWS This role suits someone who’s built apps end-to-end, thrives on ownership, and is ready to take the next step toward technical leadership. Apply or drop Jade a message to express your interest!