Job description. Senior Software Engineer - .NET & React Location: UK-based (Hybrid working available) Eligibility: UK work authorisation required (no sponsorship available) We're working with a global organisation in the financial markets space who are building out their software engineering function. They're looking for a Senior Software Engineer with a strong background in .NET Core, React, and AWS, to join a cross-functional Agile team delivering business-critical software for both internal systems and external clients. This is a hands-on role where you'll design and build high-performance applications, contribute to architectural decisions, and help shape modern engineering practices. Why join? * Work on large-scale, high-impact projects in financial services * Contribute to the full development lifecycle in a true Agile environment * Gain exposure to modern cloud infrastructure and DevOps tooling * Collaborate with experienced engineers in a supportive, delivery-focused team What you'll be doing: * Designing, building and deploying scalable software using .NET Core, React, and AWS * Working closely with architects and technical leads to align with long-term goals * Pairing with QA and DevOps to ensure secure, testable, and maintainable code * Taking ownership of features from design through to delivery * Providing mentorship and support to junior engineers * Participating in regular code reviews, retros, and Agile ceremonies * Investigating and experimenting with new technologies to solve problems What you'll bring: * 4+ years' experience in software engineering roles * Strong coding skills in C# (.NET Core) and React with TypeScript * Solid understanding of SQL (preferably Microsoft SQL Server) * Practical experience working with AWS * A proactive mindset, with excellent problem-solving and communication skills * Experience working in Agile teams with CI/CD practices * A strong focus on quality-testing, documentation, and peer collaboration Interested? Reach out to Justin Donaldson on LinkedIn for a chat about the role. No CV needed to start the conversation. Skills: Software Engineer SQL .Net React C#