Are you an experienced backend engineer with a deep background in FinTech, ready to architect a new payments platform from the ground up? We are representing a well-funded FinTech startup seeking a foundational Lead Backend Engineer. This is a unique greenfield opportunity to be the technical authority, making key architectural decisions that will shape the future of a new, cutting-edge payment aggregator. You will join a stable, well-capitalised company with a 3-year financial runway and existing international traction, offering the perfect blend of startup agility and long-term security. About Our Client Our client is on a mission to empower small and medium-sized enterprises (SMEs) with seamless, secure, and scalable payment solutions. Backed by experienced directors, their vision is to build a high-quality product supported by exceptional customer service, challenging the models built for large corporations. They are building the nucleus of a product ecosystem that will redefine FinTech for SMEs in the UK and beyond. What You''ll Be Doing As the Lead Backend Engineer, you will be the cornerstone of a new development team. You will: Lead the Architecture: Design and develop the core backend of the payment platform, including the API gateway, transaction management layer, and merchant services. Mentor and Guide: Act as a technical mentor to another backend developer, fostering a culture of high-quality engineering and collaborative growth. Own Security and Compliance: ..... full job details .....