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