It Support Engineer jobs in United Kingdom

J2EE Software Engineers (Mid to Senior Developer roles available-100% remote)

Salary £50-80k + bonus

About the Company: Our client is building the front-of-house payment gateway for a fast-growing, private, top-25 US payments company. The platform has a 19-year lineage with an architectural direction in J2EE, modernised with hybrid cloud (GCP + on-prem) for scale, security, and compliance (PCI-DSS). You will join a distributed, long-tenured engineering team delivering high-throughput, highly available transaction systems used across the globe.

The Role: As a J2EE Software Engineer, you will design and develop server-side products and APIs on the payment gateway, owning your deliverables end-to-end: discovery, design, development, automated tests, release, and monitoring. You will work in small, empowered teams using BDD/TDD and CI/CD, shipping resilient features for real merchants and real transactions.

• Design, implement, and maintain J2EE services and RESTful APIs (JAX-RS/RESTEasy).
• Build robust persistence layers with JPA2/Hibernate on MySQL 8 (InnoDB).
• Engineer scalable, fault-tolerant systems with clustered caching (Infinispan) and JGroups.
• Contribute to deployment automation (Liquibase, Ansible) and CI/CD pipelines.
• Write automated acceptance and regression tests within a BDD framework; partner closely with QA.
• Participate in estimation, planning, code/design reviews, and production readiness & monitoring.
• Collaborate across product, security, and ops to meet PCI-DSS and reliability goals.

• Server-side product development with J2EE/Jakarta EE (not a Spring-only/microservices role).
• Hands-on experience with JBoss/WildFly application servers in production.
• JPA2/Hibernate with MySQL 8 (InnoDB); strong SQL and database design.
• Infinispan (or equivalent clustered cache) and understanding of JGroups.
• JAX-RS/REST, API design, HTTP fundamentals, and secure web-app principles (PCI awareness).
• Concurrency/multithreading and performance troubleshooting.
• Tooling: Maven, CI/CD (Jenkins/GitLab/GitHub Actions), Liquibase, Ansible.
• Experience with BDD/TDD; comfortable authoring automated tests.
• SE II: ~3-6 years' experience. Senior: 8+ years with leadership/ownership stories.

• BigQuery, WebSockets, Pub/Sub (Kafka/RabbitMQ/SNS/SQS).
• Docker/Kubernetes; GCP/AWS; Observability (metrics/logs/tracing).

• Impact at scale: Core gateway that powers real-world payments across the globe.
• Modernised J2EE: Stable architecture plus contemporary engineering (IaC, automation, hybrid cloud).
• End-to-end ownership: Small teams, big outcomes, minimal bureaucracy.
• Distributed culture: Colleagues across IE, NI, UK, and EU; collaborative, low-ego environment.

If you meet the criteria and want to build reliable, high-throughput payments systems, apply via this link. Alternatively, reach out to Phil Gamble for an informal chat via LinkedIn or WhatsApp.

Phil has 20+ years in tech recruitment across the US, UK, and Ireland, delivering on complex hiring campaigns for global software companies. He takes a personalised, hands-on approach and has a long track record of helping engineers land roles they love.

“I cannot recommend Phil and Ocho enough… Phil is a professional who does not treat his candidates as resources…”

“Phil was by far the best recruiter I have ever dealt with… I wouldn’t hesitate to recommend Phil to my friends or colleagues.”

“Phil takes the time to understand what I’m looking for… and he delivers.”