Senior Full Stack Engineer

We are working with a global financial services company that is rebuilding its international payments platform, operating within the Corporate Payments division. This organisation offers an exciting opportunity to contribute to cutting-edge financial technology in a dynamic environment. The Role

• Own features end-to-end, from API and service design through to frontend delivery and production.
• Design and develop scalable backend services and APIs using C# .Net.
• Build customer-facing features across both backend and Vue frontend.
• Own architecture and technical decisions within your domain.
• Collaborate with Product, Design, and Compliance to take features from idea to production.
• Improve reliability, observability, testing, and production performance, modernising legacy services. What You'll Need
• Strong C# .Net backend development experience.
• Good knowledge of frontend development, ideally with Vue.js or React.
• Strong API, system design, and distributed systems knowledge.
• Experience with SQL and relational databases.
• Experience with production AWS (CI/CD, SQS, DynamoDB, S3, ECS, or Lambda advantageous).
• Good understanding of microservices and event-driven architectures.
• Comfort taking technical ownership and mentoring others. What's On Offer
• Competitive salary to £85k + bonus.
• 23 days holiday, rising to 28, plus your birthday off.
• Comprehensive benefits: Pension, Life Assurance, Income Protection, Critical Illness Cover.
• Healthcare package. Apply via Haystack today!