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