Principal Java Engineer - Retail

At Mindera, we craft software with people we love. We're looking for a Principal Java Engineer with strong Retail experience who can join our crew!

Please note: This is a six month contract that sits outside IR35. You will be required to work in Paddington 3 days a week.

What does the role involve?

Lead technical deep dives and knowledge sharing in the teams, anticipating challenges and proposing solutions

Start influencing product and business decisions

Hands-on Software Development:

Write high-quality Java code using frameworks such as Spring Boot or Micronaut

Build robust services that support secure, high-volume payment transactions

Develop integrations with acquiring banks, payment gateways, and fraud detection tools

Cloud & DevOps Practices:

Build and support cloud-native systems on the cloud (preferably Azure) using Terraform and Kubernetes

Manage CI/CD pipelines using GitHub Actions and ensure smooth delivery to production

Own monitoring, alerting, and observability, using tools like OpenTelemetry and Dynatrace

Security & Compliance:

Champion secure coding practices and data protection across services

Collaboration & Mentoring:

Work closely with product owners, engineering leads, and other stakeholders to shape technical solutions

Mentor and support more junior/mid/senior engineers, driving technical excellence across the board

Help establish and promote best practices around code review, testing, delivery, and operational support

Continuous Improvement:

Continuously improve platform reliability, performance, and cost-efficiency

Stay up-to-date with technology trends and proactively identify innovation opportunities

Requirements

Proven experience as a Principal Java Engineer in backend-heavy environments in teams having multiple levels of engineering

Strong experience in Java 17+, ideally with experience in using Spring Boot or Micronaut. Kotlin experience is a bonus. If the applicant does not have experience they must show willingness to learn Kotlin

Hands-on knowledge of Kafka, event-driven architecture, enterprise integration patterns and Microservices

Solid understanding of payment systems and PSP integrations, including fraud, tokenisation, and settlement flows

Experience with cloud infrastructure (Azure preferred), CI/CD, and Kubernetes

Working knowledge of regulatory and compliance standards (PCI DSS, SCA, PSD2)

Strong communication skills and the ability to explain complex technical concepts to a range of audiences

Experience working in Agile/Scrum teams with a DevOps culture and test-driven mindset

Benefits

Competitive Rates

Six month contract outside IR35 with possibility of extension

Friendly and welcoming team

Opportunity to work with one of the UK's leading Retailers

At Mindera we use technology to build products we are proud of, with people we love.

Software Engineering Applications, including Web and Mobile, are at the core of what we do at Mindera. We partner with our clients, to understand their product and deliver high performance, resilient and scalable software systems that create an impact on their users and businesses across the world.

You get to work with a bunch of great people, where the whole team owns the project together. Our culture reflects our lean and self-organisation attitude. We encourage our colleagues to take risks, make decisions, work in a collaborative way and talk to everyone to enhance communication.

We are proud of our work and we love to learn all and everything while navigating through an Agile, Lean and collaborative environment.

Check out our Blog and our Handbook

Mindera around the world: Porto, Portugal | Aveiro, Portugal | Coimbra, Portugal | Leicester, UK | San Diego, USA | San Francisco, USA | Chennai, India | Bengaluru, India | Blumenau, Brazil | Cluj-Napoca, Romania | Valencia, Spain | Casablanca, Morocco & Remote.

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