Lead Java Modernization Engineer - London, Wembley

Adecco; Wembley; On-site; GBP 75,000 - 85,000; Full time

Job summary

Adecco is seeking a Lead Modernization Engineer for Java/Node.js in Wembley, on-site five days a week. You will define standards, mentor developers, and drive cloud-native modernization initiatives across Java and Node.js services.

You'll own API design, security-first practices, and the CI/CD pipeline, with hands-on work on Azure services, containerisation, and logging. This is a senior role requiring architectural collaboration and strong coding leadership.

Qualifications

• Strong Java development with Spring Boot and microservices ownership.
• Experience consuming Azure-native services, including Key Vault, Storage API and Service Bus.
• CI/CD mindset; able to read/write Dockerfiles and GitHub Actions YAML workflows.
• Deep RESTful API expertise, OAuth2 flows, and SendGrid DMARC integration.

Responsibilities

• Define and enforce Java/Node.js coding standards with robust exception handling and secure-first development practices.
• Ensure cloud-native readiness and containerisation, including health checks and secret management via Azure Key Vault.
• Provide mentorship to junior/mid developers, conduct code reviews, and promote engineering excellence.
• Translate High-Level Designs into production plans with architectural alignment.
• Champion automated testing: unit, integration, and contract tests to ensure stable deployments.

Skills

Java

Spring Boot

Microservices

Azure integration

Docker

GitHub Actions

RESTful APIs

OAuth2

SendGrid

DMARC

Tools

Docker

GitHub Actions

Azure Key Vault

Azure Storage API

Azure Service Bus

Job description

Job Title:

Lead Modernization Engineer Java / Node.js

Salary:

Paying £75,000 - £85,000 per annum

Location:

Wembley London - 5 days on-site

Client:

Our client, a well-established and diversified multinational organisation, is seeking a Lead Modernization Engineer Java / Node.js to join their team.

Skills:

• Solid Experience in Java development with significant, demonstrable experience in Spring Boot and Microservices architecture - not just familiarity, but production ownership.
• Azure Integration: Proven experience building applications that consume Azure-native services, including Azure Key Vault for secrets, Azure Storage API, and Azure Service Bus for event-driven messaging.
• DevOps Mindset: Solid understanding of the full CI/CD lifecycle; comfortable reading and contributing to Dockerfiles and GitHub Actions YAML workflows - not as a DevOps engineer, but as a developer who understands the pipeline their code flows through.
• API Mastery: Deep expertise in RESTful API design principles, OAuth2 authentication flows (including FusionAuth integration), and DMARC-compliant transactional email logic via SendGrid.

Duties:

• Engineering Standards: Define and enforce the clients Java and Node.js coding standards across the team - with a specific focus on robust exception handling, ninary stream handling, structured logging via Application Insights, and adherence to security-first development practices.
• Cloud-Native Readiness: Ensure all application logic is optimised for containerisation from the ground up. This includes implementing proper Health Check endpoints, secure Secret Management via Azure Key Vault, correct port mapping for Container Apps, and stateless design principles compatible with Azure Container Apps (ACA).
• Technical Mentorship: Provide direct, hands-on mentorship to junior and mid-level developers - identifying technical debt at the codebase level, running structured code reviews, and building a culture of engineering excellence that prevents recurring quality issues such as corrupted or misconfigured deployments.
• Architectural Liaison: Work closely with the Principal Architect to translate High-Level Designs (HLDs) into production-ready implementation plans - ensuring the development team understands not just what to build, but why the architectural decisions were made, and what constraints must be respected.
• Quality Assurance: Champion a strong automated testing culture - unit tests, integration tests, and contract tests - to prevent regression and ensure deployments are verifiably stable before reaching production.