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Java Full Stack Developer

Job in Belfast, County Antrim, BT1, Northern Ireland, UK
Listing for: Mastek Limited
Full Time position
Listed on 2026-08-01
Job specializations:
  • Software Development
    Backend Developer, Java Developer, Full Stack Developer
Job Description & How to Apply Below

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Mastek is set to deliver a high-profile programme for a central government department. The programme represents the next generation of the UKs biometric capability replacing and integrating with legacy systems and other departments.

A unique development opportunity to work on a Public Sector Based Large Scale programme with an innovative market leader.

Job Description for Java Developer – L3 Service Support

You will be part of the L3 Service Support Team. Key responsibilities are listed below

  • Analysis, fixing, triaging & coordinating live defects and will work closely with the development team
  • Ensure and maintain overall operations stability with pre-empt health checks and daily checks.
  • Actively perform Root cause Analysis of various issues and take it to resolution.
  • Use systematic methods to triage, research, diagnose, and provide workarounds or solutions to both technical and functional issues with the product
  • Take ownership of all queries/issues, identify and highlight issues to relevant departments for resolution and follow through until resolved.
  • Adhere to agreed response time and resolution time SLAs
  • Collaborate with distributed team of developers, analysts, business owners, across all levels.
  • Ability to grasp new concepts quickly, and excellent problem-solving and communication skills

Location: UK, Onsite

  • Hands on experience with Java 8 or above
  • Hands on experience on writing Junits
  • Hands on experience on Spring Framework, Spring Boot
  • Hands on experience with relational database (e.g. PostgreSQL)
  • Hands-on experience on Git, Jenkins
  • Understanding of micro-services architecture
  • Understanding of AWS services like ECS, EKS, S3, SQS
  • Understanding of REST APIs
  • Understanding of CICD
  • Good understanding of Kubernetes
Nice to have

Skills:
  • Docker
  • AWS API Gateway and Serverless technologies
  • BPM framework
  • Mustache template
  • Experience in large scale integration projects involving messaging, web services and distributed systems
  • ELK stack
  • Open Stack platform
To qualify for the role, you should have:
  • A self-starter, comfortable working in both process driven and ambiguous environments
  • Experience and a passion for working within Central Government and other sectors.
  • Proven capability of working successfully with senior client stakeholders and end-users, quickly building successful relationships and establishing credibility
  • A passion for digital and technology, with the drive and determination to continually learn new things and develop yourself and others
  • Good written, presentation and verbal communication skills, with a high degree of attention to detail
  • Good organisational skills, with the ability to work independently in a highly collaborative, team-based environment
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