Senior Full Stack Engineer

PaymentGenes are supporting a high-growth fintech company is building next-generation financial infrastructure focused on enabling fast, efficient international funds distribution for businesses. Currently midway through an MVP build, the team is looking to hire a Senior Full Stack Engineer to join at a critical stage of product development.

You will work closely with a small, experienced engineering team to help design and deliver a regulated financial platform from the ground up, with a strong emphasis on performance, scalability, and security.

The Opportunity This role offers end-to-end ownership across the stack, with involvement in architecture, implementation, and building systems designed for compliance within a regulated environment. The team is focused on creating robust, auditable, and scalable systems from day one., * Design and build end-to-end features across frontend and backend

• Contribute to transaction processing and ledger systems
• Develop event-driven services using modern architectural patterns
• Build real-time functionality using WebSockets
• Integrate with third-party providers (e.g. identity verification, payments)
• Support fraud prevention and monitoring capabilities
• Contribute to infrastructure and CI/CD pipelines
• Ensure systems are secure, resilient, and compliant

Technology Stack

• TypeScript across the stack
• Modern backend frameworks (Node.js ecosystem)
• React (TypeScript) and contemporary UI libraries
• Relational and NoSQL databases (e.g. PostgreSQL, DynamoDB)
• Cloud-native infrastructure (AWS or similar)
• Event-driven architecture
• Monorepo setup and CI/CD pipelines

Do you have experience in TypeScript?, * 5-7 years of software engineering experience

• Strong full stack development experience with TypeScript
• Experience building and scaling production systems
• Solid understanding of APIs and distributed systems
• Experience with relational databases
• Awareness of security and compliance considerations
• Comfortable working in a fast-paced, startup environment

• Hybrid working model (London-based)
• Early-stage opportunity with real ownership and impact
• Strong engineering culture and standards
• Competitive benefits package including pension
• Dedicated time for learning and development
• Collaborative, low-ego environment