Overview
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.
Key Responsibilities
* 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.
Essential Criteria
* 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.
Nice to Have
* BigQuery, WebSockets, Pub/Sub (Kafka/RabbitMQ/SNS/SQS).
* Docker/Kubernetes; GCP/AWS; Observability (metrics/logs/tracing).
Why Join
* 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.
How to Apply
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.
About Phil Gamble
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.
Recent LinkedIn Testimonials
“I cannot recommend Phil and Ocho enough… Phil is a professional who does not treat his candidates as resources…”
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