> Markdown version of [/jobs/ext/2892749-principal-java-engineer-retail](https://www.wearedevelopers.com/jobs/ext/2892749-principal-java-engineer-retail). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Principal Java Engineer - Retail - **Company:** Mindera - **Location:** London, UK (Remote available) - **Salary:** £66,521.0 - **Contract:** Temporary to permanent - **Skills:** Java (Programming Language), Acceptance Test-Driven Development, Microsoft Azure, Cloud Computing, Code Review, Continuous Integration, DevOps, Payment Systems, Fraud Prevention and Detection, Github, Payment Gateway, PCI Data Security Standards, Scrum Methodology, Software Engineering, Enterprise Application Integration, Spring-boot, Backend, Kotlin, Event Driven Architecture, Kubernetes, Apache Kafka, Terraform, Dynatrace, Microservices - **Published:** September 14, 2026 - **Apply:** https://www.adzuna.co.uk/jobs/details/5483834516 ## About the Role * 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. ## Description 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. ## Related Videos - [From DevOps to Scaled DevOps: How We’re Rebuilding Continuous Delivery as a Platform](https://www.wearedevelopers.com/videos/100018-from-devops-to-scaled-devops-how-we-re-rebuilding-continuous-delivery-as-a-platform) - [Innovating Developer Tools with AI: Insights from GitHub Next](https://www.wearedevelopers.com/videos/1268-innovating-developer-tools-with-ai-insights-from-github-next) - [Kotlin Multiplatform - True power of native code reuse](https://www.wearedevelopers.com/videos/4-kotlin-multiplatform-true-power-of-native-code-reuse) - [Inside Bitpanda's Tech Stack: Scaling a European Fintech Leader - Markus Dorner](https://www.wearedevelopers.com/videos/1979-inside-bitpanda-s-tech-stack-scaling-a-european-fintech-leader-markus-dorner) - [Migrating half a million users to a new payment service provider](https://www.wearedevelopers.com/videos/730-migrating-half-a-million-users-to-a-new-payment-service-provider) - [DevOps Maturity Check – a way to balance autonomy and alignment](https://www.wearedevelopers.com/videos/58-devops-maturity-check-a-way-to-balance-autonomy-and-alignment) ## Related Articles - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [The Biggest German Tech Companies](https://www.wearedevelopers.com/magazine/424-the-biggest-german-tech-companies) - [Top-Paying Tech Jobs (with Salaries)](https://www.wearedevelopers.com/magazine/372-top-paying-tech-jobs-with-salaries) - [7 Most Popular Web Developer Jobs in Europe](https://www.wearedevelopers.com/magazine/163-7-most-popular-web-developer-jobs-in-europe) - [The Most Popular IT Jobs on the Market](https://www.wearedevelopers.com/magazine/376-the-most-popular-it-jobs-on-the-market) - [Software Engineer Salary London](https://www.wearedevelopers.com/magazine/252-software-engineer-salary-london)