Location: London Type: Contract - 6 months (highly extendable) Day Rate: Up to £550/day (Outside IR35) We are seeking a highly experienced Senior Backend Engineer with deep expertise in Golang to support the development and enhancement of Back End systems within a fast-paced financial services environment. This is a 6-month contract offering the opportunity to work on cutting-edge systems that support core banking and commercial lending operations. Key Responsibilities Design, develop, and maintain high-performance Back End services and APIs using Go (Golang). Collaborate with cross-functional teams including product owners, QA, DevOps, and Front End engineers. Drive the implementation of scalable, secure, and robust architectures aligned with business and technical needs. Enhance existing systems to improve performance, security, and reliability. Deliver clean, well-tested, and maintainable code, following best practices. Contribute to technical design decisions and code reviews. Requirements Proven experience as a Back End engineer with strong proficiency in Golang. Previous work experience in the banking sector or on commercial lending platforms is essential. Solid understanding of microservices architecture, RESTful API development, and distributed systems. Familiarity with cloud platforms such as AWS, GCP, or Azure. Good knowledge of containerisation and orchestration tools (Docker, Kubernetes). Experience working with relational and NoSQL ..... full job details .....