Senior Java Software Engineer

Mastek; Leeds; On-site; GBP 75,000 - 110,000; Full time

Job summary

Mastek in Leeds is seeking a Senior Software Engineer with strong Java (Spring Boot) and AWS skills to design, develop, and optimize scalable, cloud-native applications, with a focus on reliability, security, and quality.

You will work in a fast-paced, collaborative environment, contribute to architecture and best practices, drive CI/CD adoption, mentor junior engineers, and help continuously improve performance, resilience, and user experience across multiple services.

Qualifications

• 7+ years of software development experience.
• Strong Java, Spring Boot, and AWS expertise.
• Experience building cloud-native solutions and microservices.

Responsibilities

• Develop clean, secure, and maintainable code.
• Design scalable, reusable components and services.
• Collaborate with developers, QA, and cross-functional teams.
• Troubleshoot production issues; ensure system stability.
• Contribute to architecture decisions and best practices.
• Implement modern engineering standards, including CI/CD and DevOps.
• Support system integration across multiple applications and services.
• Continuously improve user experience and application performance.
• Monitor, operate, and optimize production systems in a cloud environment.
• Provide Level 3 (L3) support on a rotational/on-demand basis.

Skills

Java (Spring Boot)

AWS Services

Microservices

CI/CD

DevOps

Angular/TypeScript

TDD/Testing

Security practices

SDLC

Agile

Job description

Role: Senior Software Engineer (Java + AWS)

Experience: 7+ Years Relevant

Job Summary

We are seeking an experienced Software Engineer with strong expertise in Java and AWS cloud technologies to design, develop, and enhance scalable, high-performing applications. The ideal candidate will have hands-on experience building cloud-native solutions, working with modern development frameworks, and leveraging automation and testing tools to deliver reliable software that meets user needs.

You will play a key role in developing end-to-end solutions, collaborating with cross-functional teams, and continuously improving production services.

Key Responsibilities

• Develop clean, secure, and maintainable code following test-driven development (TDD) practices
• Design and build scalable, reusable software components and services
• Collaborate closely with developers, QA, and cross-functional teams to deliver high-quality solutions
• Troubleshoot and resolve production issues; ensure system stability and performance
• Contribute to application architecture, design decisions, and best practices
• Implement and follow modern engineering standards, including CI/CD and DevOps practices
• Support system integration across multiple applications and services
• Continuously improve user experience and application performance
• Monitor, operate, and optimize production systems in a cloud environment
• Provide Level 3 (L3) support on a rotational/on-demand basis (flexible, not mandatory)

Required Skills & Qualifications

• Strong experience in Java (Spring Boot) and microservices architecture
• Hands-on experience with AWS services, such as:
• ECS, ECR, Lambda, API Gateway
• S3, DynamoDB, SQS, Step Functions
• Exposure to API management tools (e.g., Apigee) is a plus
• Experience with frontend technologies, such as AngularJS and TypeScript
• Proficiency in CI/CD and DevOps tools, including:
• Familiarity with scripting languages (Groovy, Bash)
• Experience with testing frameworks and practices:
• Strong understanding of the Software Development Lifecycle (SDLC)
• Knowledge of secure coding practices and code quality tools (e.g., SonarQube, Fortify)
• Experience working in Agile environments

Preferred Qualifications

• Understanding of user-centered design principles
• Experience managing or contributing to CI/CD pipelines
• ITIL certification (preferred but not mandatory)

What We’re Looking For

• Strong problem-solving and analytical skills
• Ability to work in a fast-paced, collaborative environment
• Ownership mindset with a focus on quality and continuous improvement

Why Join Us?

• We're a purpose-driven organisation committed to creating positive impact and championing inclusion.
• You’ll join a culture that encourages innovation, collaboration, and continuous growth.
• We celebrate difference and believe diverse perspectives lead to stronger solutions.
• Even if you don't meet every requirement, we encourage you to apply - great talent comes from a variety of backgrounds.
• Your lived experience, unique strengths, and personal story matter - they help us design better outcomes for the communities we serve.
• We celebrate diversity of experience, knowledge, backgrounds, and perspectives, and believe these differences enable us to create meaningful impact. We are proud to be an equal opportunity employer and are committed to fairness and inclusion for all, regardless of sex, race, religion or belief, ethnic or national origin, disability, age, citizenship, marital or partnership status, sexual orientation, gender identity, pregnancy or related conditions, or any other protected characteristic. If you require any reasonable adjustments or additional support during the recruitment process, please let us know.