Java Full Stack Developer

Mastek; Reading; Hybrid; GBP 60,000 - 100,000; Full time

Job summary

Mastek is delivering a high-profile programme for a central government department in the UK. As a Java full stack developer you will design and develop cloud-native applications within a multi-vendor project.

You will lead Java development teams, drive best practices, and contribute to architectural discussions while working in a hybrid model with 1-2 days weekly travel to Reading.

Qualifications

• Extensive server-side Java 8+ development with Spring, Hibernate.
• Strong microservice architecture understanding and REST API experience.
• Experience with unit and integration testing (JUnit, Mockito, WireMock) and TDD/BDD.
• CI/CD pipelines using Docker, Jenkins and Kubernetes.
• Led Java teams delivering high-quality software and guided code reviews.

Responsibilities

• Design and develop cloud-native Java applications and microservices.
• Collaborate across teams to ensure seamless integration of components.
• Participate in architectural and design discussions; propose scalable solutions.
• Mentor junior developers and guide the sprint timelines and deliverables.
• Contribute to building robust test strategies and maintainable codebase.

Skills

Java 8+

Spring/Spring Boot

Hibernate

Microservices

REST APIs

JUnit/Mockito/Wiremock

CI/CD: Docker/Jenkins/Kubernetes

Team leadership

Code reviews & standards

Agile Scrum/Kanban

PostgreSQL

Tools

JUnit

Mockito

PowerMockito

Wiremock

Job description

Hybrid with 1-2 days in a week travel to Reading office.

Role Description - Java Full Stack Developer

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 government departments.

You will be part of a Mastek team in a multi-vendor project with a shared code base. As a Java full stack developer you will be responsible for designing and developing cloud native applications using cutting edge technologies.

The role requires in-depth understanding of the software development lifecycle and strong technical experience with an open-minded attitude and ability to rapidly adapt and learn.

Must have skills

• Extensive server-side, hands‑on Java 8+ development experience with strong Spring, Spring Boot & Hibernate
• Strong understanding of Microservice architecture
• Experience building web services and APIs on REST
• Strong understanding of unit & integration tests, following TDD / BDD
• Experience using test frameworks like Junit, Mockito, PowerMockito & Wiremock
• Experience and understanding of CICD pipeline of Docker, Jenkins and Kubernetes
• Led a team of Java developers to deliver high-quality software solutions
• Design and develop Java applications, APIs, and microservices
• Work collaboratively with other teams to ensure seamless integration of software components
• Conduct code reviews and ensure adherence to best practices and coding standards
• Actively participating in architectural & design discussions
• Experience with Agile development methodologies (Scrum, Kanban)
• Mentor junior developers and provide technical guidance to the team
• Take ownership of scrum team's timelines and deliverables
• Proposing solutions to complex problems that are in the boundary of the existing system architecture
• Have an ability to communicate technical concepts to a non-technical audience.
• Understanding of all the agile ceremonies.
• Experience in Relational Database Management System (e.g. PostgreSQL)

Nice to have skills

• Knowledge of Workflow/Business Process Management tools
• Experience with Performance and Monitoring tools: JMeter, Kibana, Splunk, Dynatrace
• Experience writing Shell script
• Understanding of Python
• Good understanding on AWS services (EC2, ECS, EKS, API Gateway and Serverless technologies)
• Integration Engine tools: Apache Camel and Active MQ for messaging, web services and distributed systems
• Public Sector domain experience preferable