Senior Developer – London 2 days a week/3 days remote | Software Engineering

A growing tech organisation is looking for a Senior Developer to join its Software Engineering team in London. This is a great opportunity for a hands-on technologist who enjoys solving complex problems, working on large-scale enterprise systems, and delivering high-quality software solutions.

In this role, you’ll contribute to technical design, end-to-end development, and delivery of enhancements across a suite of core enterprise products. You’ll work closely with architects, project managers, and cross-functional teams, while also mentoring junior developers and supporting continuous improvement initiatives.

Key Responsibilities

Before Development

• Understand customer, business, and internal R&D requirements
• Analyse existing system functionality and identify design gaps
• Take part in requirements and design discussions with architects and analysts

Development & Testing

• Design and build enhancements and custom modules across a broad enterprise product stack
• Develop new product features for inclusion in the wider platform
• Conduct code reviews, write unit tests, and ensure adherence to development standards
• Work collaboratively within Agile teams, contributing to sprint planning and estimations
• Support bug fixing, performance optimisation, and integration testing

Release & Deployment

• Provide build and release documentation to DevOps and QA teams
• Support smooth deployment cycles and quality assurance processes

Collaboration & Reporting

• Report progress, risks, and issues to the Software Engineering Manager
• Mentor junior developers and support technical troubleshooting
• Contribute to technical documentation and best-practice guidelines

Requirements

Experience

• Strong track record in Java-based software design and development
• Previous experience in senior or technical leadership roles
• Background in high-transaction or large-scale enterprise systems (telecoms/billing experience advantageous)

Technical Skills

Essential

• Java, Spring Boot, J2EE
• REST APIs, Microservices, Kubernetes/OpenShift
• RDBMS, SQL, PL/SQL
• Angular, JavaScript, Bootstrap, HTML5, CSS3
• Experience with application servers (e.g., JBoss, Oracle AS)
• Git, Maven, Jenkins, debugging tools
• Strong understanding of SDLC and Agile methodologies

Desirable

• JBoss Fuse/Apache Camel, DROOLS, BI platforms
• Experience with C/Pro*C on UNIX
• Knowledge of BSS/OSS, Mediation, Billing, or Charging systems
• Familiarity with Cloud-native and DevOps pipelines