Senior Product Engineer

Senior Product Engineer £120k+ | Equity | Fully Remote or Hybrid work in the London & Manchester offices The Company We're working with a venture-backed B2B SaaS company building a modern financial operations platform for businesses managing complex, high-volume transactions. Despite billions moving through financial systems every day, many businesses still rely on fragmented software, spreadsheets and manual processes to reconcile payments, investigate discrepancies and manage operational workflows. This company is changing that. Their platform connects financial data across multiple systems, automates complex workflows and gives businesses a real-time view of their operations. Think high-volume transaction processing, intelligent reconciliation, complex integrations and intuitive interfaces that turn messy financial data into something businesses can actually work with. The business has an established product, a growing customer base and a small, highly capable engineering team. They're now entering their next phase of growth, with plenty of interesting technical challenges still to solve. The Role They're hiring a Senior Product Engineer who wants more than a backlog of tickets. You'll work across the stack, taking ownership of substantial product features from early discussions through to production. Engineers are closely involved in deciding what gets built, how it works and whether it genuinely solves the problem. You'll be working on challenges involving real-time data, complex integrations, developer-facing APIs and the architecture needed to support a growing SaaS platform. What You'll Be Doing

• Building customer-facing features used by businesses managing complex financial operations.
• Designing scalable backend services, APIs and integrations.
• Working across frontend and backend engineering to deliver complete product experiences.
• Solving challenges involving real-time data processing, performance and distributed systems.
• Building intuitive interfaces for complex operational workflows and large datasets.
• Working closely with product, design and customers to turn difficult problems into elegant software.
• Influencing technical architecture and engineering decisions as the platform grows.
• Taking genuine end-to-end ownership of what you ship. What We're Looking For
• Strong experience building and shipping production software, ideally within B2B SaaS.
• Excellent backend engineering fundamentals and the ability to work across the product stack.
• Experience designing APIs, integrations and scalable software systems.
• An understanding of distributed systems, reliability and performance.
• Strong product instincts and an interest in understanding the people using your software.
• Comfortable taking ownership and making technical decisions without layers of management. We're not looking for engineers who simply know a particular framework. We're interested in people who understand how to build excellent software products. Why It's Interesting
• Real engineering ownership. You'll influence both the product and the technical decisions behind it.
• Interesting technical problems. Complex integrations, real-time data, APIs and scalable architecture rather than another straightforward CRUD application.
• Small team, meaningful impact. You'll work closely with experienced engineers and see the direct impact of what you build.
• A product with momentum. Established customers, venture backing and an opportunity to help shape the next stage of growth. Interested in building an ambitious SaaS product where you'll have genuine ownership and technical influence? Get in touch.