Java Engineer
Hydrogen Group ·www.hydrogengroup.com
Apply directLead Software Engineer – Java / Platform Engineering - Contract - Inside IR35
We’re supporting a large-scale technology modernisation programme within a complex enterprise environment and are looking for several experienced Lead Software Engineers to join a high-performing engineering team.
This is an opportunity to work on a greenfield platform build, helping shape and deliver a core middleware capability that will support multiple business-critical services and applications.
The Opportunity
You’ll join an established engineering function delivering modern platform and backend services within a cloud-based environment. The work focuses on building scalable, production-grade shared services and APIs within containerised AWS infrastructure.
The programme is highly collaborative and suited to engineers who enjoy operating within cross-functional teams alongside architecture, platform, and product stakeholders.
Key Responsibilities
- Designing and building scalable Java-based backend services
- Developing microservices and event-driven solutions
- Contributing to platform and shared service architecture
- Building and maintaining production-grade APIs
- Working within containerised AWS environments
- Collaborating with engineering, architecture, and product teams
- Providing technical leadership within an agile squad environment
Required Experience
- Strong hands-on Java development experience (Java 11+)
- Commercial experience with Spring Boot
- Microservices and event-driven architecture experience
- Experience with Kafka or similar messaging technologies
- AWS cloud engineering experience
- Containerisation and Kubernetes/EKS exposure
- CI/CD pipeline and DevOps practices
- Experience operating within complex or regulated enterprise environments, ideally Financial Services
What We’re Looking For
- Engineers operating at Lead level technically
- Strong communication and stakeholder engagement skills
- Experience owning technical decisions and solution design
- Comfortable working autonomously within fast-paced delivery environments
- Individuals who thrive within collaborative supplier/client engineering team
Working Arrangement
- Hybrid working model
- London-based delivery environment
- Regular on-site collaboration expected (2 days per week)
Additional Information
- Immediate to short-notice availability preferred
- Multiple hires planned with potential for further team growth
- Fast-moving interview and onboarding process
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