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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # VodafoneThree - Senior Software Engineer - **Company:** VodafoneThree - **Location:** London, United Kingdom - **Experience:** Expert - **Salary:** £71,434 - **Contract:** Permanent contract - **Skills:** Clean Code Principles, Java (Programming Language), LTE (Telecommunication), Artificial Intelligence, Amazon Web Services, Automation of Tests, Code Generation, Profiling, Software Quality, Continuous Integration, Software Debugging, Key Management, Load Testing, Object-Oriented Software Development, Performance Tuning, Software Architecture, Secure Coding, Software Engineering, Systems Integration, Cloud Platform System, Spring-boot, Caching, Backend, Restful APIs, Api Management, Serverless Computing, Golang, Microservices - **Published:** November 12, 2026 - **Apply:** https://www.adzuna.co.uk/jobs/details/5962850062 ## About the Role * Strong professional experience building and operating production-grade backend systems using Java and Spring Boot, with solid knowledge of object-oriented design, clean code, and software engineering principles. * Proven experience designing and developing distributed microservices, including service boundaries, API contracts, inter-service communication, and independent deployment. * Strong understanding of asynchronous processing, messaging patterns, event-based integration, eventual consistency, idempotency, retries, dead-letter queues, and failure handling. * Experience designing and implementing RESTful APIs, versioned contracts, and integrations with internal and external systems. * Ability to diagnose complex production issues, analyse system behaviour, and implement solutions that improve resilience and observability. * Experience with automated testing (unit, integration, end-to-end) and CI/CD pipelines. * Strong understanding of performance optimisation and debugging. * A willingness to T-shape and grow into adjacent areas such as web or app engineering. Good collaboration and communication skills, with experience of mentoring others. Desirable : * Understanding of secure coding practices, authentication and authorisation, secrets management, encryption, and least-privilege access in cloud environments. * Experience with load testing, capacity planning, profiling, caching strategies, and optimisation of high-throughput or latency-sensitive services. * Experience using AI-assisted development tools (e.g. code generation, review or testing assistants) in a production setting. * Experience optimising AWS infrastructure costs, serverless execution, compute utilisation, and service-level resource consumption. * Experience with high-traffic online retail platforms and business-critical flows. ## Description * Build, maintain, and evolve scalable, high-performance backend services using Java, Spring Boot, and Go. Take ownership of features from technical design through to delivery and ongoing support. * Design robust microservice architectures, define service boundaries, and contribute to architectural decisions that support scalability, maintainability, and long-term evolution. * Broaden your skill set beyond the back end by T-shaping into adjacent areas such as front end or app engineering, contributing across the wider stack as needed. * Leverage AI-assisted development tools to accelerate delivery in a safe, scalable and maintainable way, establishing good practice for how the team adopts them. * Collaborate closely with product, design and cross domain teams to deliver well-architected solutions. * Champion code quality through reviews, testing, and clear engineering standards. * Mentor and support more junior engineers, sharing knowledge and best practice. * Help define and evolve the backend architecture, tooling and CI/CD processes. * Investigate and resolve performance, accessibility and stability issues across the application., We are regulated by the Financial Conduct Authority and all offers of employment for this role are subject to background checks, including criminal (DBS) and financial checks to meet the regulators standards. If you require any reasonable adjustments or have an accessibility request as part of your recruitment journey, for example, extended time or breaks in between online assessments, a sign language interpreter, or assistive technology, please refer to the Accessibility section of our Careers website ( https://careers.vodafone.com/uk/reasonable-adjustments/ ) for guidance. We use AI in different parts of our business to boost innovation, improve efficiency, and create new opportunities. We know many candidates use AI to fine-tune their CVs or prepare for interviews, but what we really care about is your unique experiences and achievements. During the interview, we want you to rely on your own knowledge and skills to show us who you really are-your personality, creativity, and abilities. Above all, we're looking for authenticity and can't wait to get to know the real you.