Senior Java Software Engineer (Pricing API) – 5 days – London

Senior Software Engineer - (Java, Pricing API,) - 5 days - Retail - London Day rate: £400 - £500 (inside IR35) Duration: 6 months On site: 5 days per week Start: Now My client is looking for a Senior Java Developer with 8 - 15 years experience to join the team 5 days a week in their London office. This is an opportunity to work on a mission critical pricing and promotions API that supports over 28 million UK customers weekly, across all platforms with global expansion ahead. This role involves designing and scaling a high-performance, internet-facing API operating across distributed environments. If you enjoy solving complex engineering challenges and building resilient systems at scale, this could be a great fit. What You'll Be Doing Designing and building scalable backend systems using Java and the JVM ecosystem Developing clean, maintainable code from product requirements Applying TDD/BDD practices and modern engineering principles Building and maintaining cloud-native infrastructure Working on highly available distributed systems Troubleshooting production issues and driving root cause analysis Mentoring others and contributing to engineering best practices Exploring and introducing new tools and technologies Tech Stack Java | Vert.x | RxJava | Groovy Couchbase | Kafka Azure | Kubernetes | Terraform GitHub Actions | CI/CD pipelines What We're Looking For Strong experience with Java (8+) Hands-on expertise with cloud platforms (Azure, AWS, etc.) Experience with SQL and NoSQL databases Proven ability to build and scale distributed systems Understanding of Agile delivery methods Exposure to reactive programming Experience in eCommerce or search platforms *Rates depend on experience and client requirements