Senior Software Engineer (React / TypeScript) At a Glance Staff-level frontend engineering role at a product-led technology organisation investing seriously in platform evolution React, TypeScript, JavaScript complex, mission-critical workflows at significant scale Remote with occasional in-person time in Belfast Salary: Lead through expertise and influence across multiple engineering teams no hierarchy, no empire-building About the Company Our client is a product-led technology organisation with a complex, mission-critical platform supporting workflows at significant scale. They are continuing to invest heavily in engineering capability and platform evolution, and are looking for a Senior Software Engineer who can shape both the frontend systems and the standards that will carry the platform forward. This is a serious engineering environment with serious frontend challenges worth solving. The Role This is a high-impact role for an engineer who acts as a technical force multiplier rather than a line manager. You will lead the design and evolution of scalable frontend architectures in React, TypeScript and JavaScript, contribute across the wider full stack where needed, and help define the long-term technical direction of the organisation. If you want genuine influence and enjoy leaving systems and teams better than you found them, this role was written with you in mind. Key Responsibilities Work on React, TypeScript and JavaScript applications at scale Own scalability, performance and reliability initiatives across web applications Reduce frontend technical debt and drive measurable improvements in system health Partner with Product to translate complex workflows into intuitive, high-quality user experiences Collaborate with Platform and SRE teams to improve observability and operational excellence Mentor engineers and raise standards across teams through code reviews, coaching and knowledge sharing What You'll Need Essential 6+ years of software engineering experience operating at Senior level Deep expertise in React and the modern JavaScript and TypeScript ecosystems Strong track record building scalable, high-performance frontend applications Solid understanding of API integration and full stack architecture Experience operating within complex or legacy product environments Proven ability to influence technical direction across multiple teams without formal authority Clear communicator who can drive alignment across Product, Engineering and Platform Right to work in the UK Nice to have Experience with Node.js backend services Exposure to data-heavy or analytics-driven applications AWS or cloud-native architecture experience and familiarity with CI/CD and SRE practices Why Apply Remote working with flexibility and occasional in-person time in Belfast Genuine Staff-level scope frontend architecture, standards and long-term technical direction are yours to shape Complex, mission-critical platform with real engineering challenges High-growth organisation investing seriously in engineering capability and platform evolution Next Steps Connect with Ryan Quinn on LinkedIn or apply via the link below. Skills: JavaScript AWS TypeScript Benefits: Work From Home Options, bonus