Principal Full Stack Software Engineer

Senior Full Stack Software Engineer At a Glance Senior full stack role... full stack genuinely means full stack here React frontend, modern backend... complex operational software used by thousands of field-based users daily UK remote with quarterly in-person meetings in Belfast Single stage technical interview Real ownership, architectural influence, and a team where engineering quality genuinely matters About the Company Our client is a product engineering organisation building large-scale operational software used daily by thousands of field-based users. The technical challenges are real: scale, reliability, data flow, and user experience all matter, and the team operates with the pace and standards to match. This is a place where senior engineers have genuine influence, not just tickets to close. The Role This is not a surface-level full stack position. The team needs a senior engineer who has delivered meaningful complexity across both backend and frontend, influenced architecture, and worked closely with Product from early ideation through to production. You will own solutions end to end, contribute to technical direction, and help raise the bar for the engineers around you. If you want autonomy, real technical challenges, and a team that takes quality seriously, this is worth a look. Key Responsibilities Partner with Product from ideation through to delivery, shaping technical solutions from the outset Design and build substantial backend functionality underpinning complex operational workflows Deliver high-quality React-based frontend experiences that are performant, intuitive, and resilient Lead architectural discussions around system design, data flow, and technical trade-offs Write clean, maintainable, well-tested production code Drive improvements across engineering standards, patterns, and best practices Mentor other engineers and help elevate technical capability across the wider team What You'll Need Essential: Proven track record delivering meaningful complexity across both backend and frontend engineering Strong commercial React experience, including component architecture and state management Solid backend engineering experience using a modern language and framework Experience influencing system design and architecture, not simply implementing tickets Comfortable working within distributed, service-oriented, or event-driven systems Strong understanding of data modelling, API design, and performance optimisation Product-minded approach with a strong ownership mentality Right to work in the UK Why Apply? Work on complex, high-scale product challenges with visible impact Genuine technical leadership... architecture, standards, and direction are yours to shape UK remote with flexibility and quarterly team time in Belfast Single stage technical interview... no multi-month hiring processes Engineering culture where quality is the standard, not the aspiration Interview Process Single stage technical interview, focused on system design, code reasoning, and problem solving. Streamlined, fair, and efficient. Next Steps To discuss the opportunity in confidence, connect with Ryan Quinn on LinkedIn or reach out at . Skills: JavaScript AWS TypeScript Python Go Java Benefits: Options

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