Senior Backend Engineer — Java / Data Pipelines (Remote)

GemPool Recruitment; Dublin; Remote; EUR 77,000 - 94,000; Full time

Job summary

GemPool Recruitment is seeking an experienced Senior Backend Developer to join a global entertainment technology and data analytics business. The role focuses on building backend services, REST APIs, and data processing pipelines using Java/Jakarta EE in a remote Ireland setting.

You will work with cloud, containers, ETL, and AI-assisted tooling, contributing to platform modernization and scalable architecture.

Qualifications

• 6+ years of Java backend development.
• Experience with Jakarta EE, including JAX-RS, CDI and Servlets.
• Experience with data integration, ETL, batch processing or file ingestion.
• Experience with Redis and PostgreSQL.
• Experience securing REST APIs using JWT or OAuth2.
• AWS experience, especially S3, ECS/EKS, SQS, EventBridge and Secrets Manager.
• Experience migrating on-prem Java apps to cloud.
• Upgrading Java versions (11 to 17/21) and Hibernate (5 to 6).
• Experience with media/entertainment or large-scale datasets.

Responsibilities

• Develop and maintain backend services and REST APIs using Java/Jakarta EE.
• Build and enhance data ingestion processes and ETL pipelines.
• Process and aggregate large volumes of transaction data.
• Write and optimize SQL queries across databases.
• Work with Redis for caching and data access.
• Improve ingestion reliability with validation and monitoring.
• Support backend for new web and mobile apps.
• Contribute to cloud modernization and containerization.
• Develop tests with JUnit and TDD practices.
• Collaborate with Product and Engineering teams on new products.

Skills

Java backend development

REST APIs design

SQL query optimisation

Data integration

Cloud readiness

Tools

Jakarta EE / Java EE servers (TomEE, Payara)

Docker

GitLab CI

Linux environments

Redis

PostgreSQL

SingleStore (MemSQL)

AWS (S3, ECS/EKS, SQS)

OpenAI Codex / Claude Code

Job description

GemPool Recruitment is seeking an experienced Senior Backend Developer to join a global entertainment technology and data analytics business. The role focuses on building backend services, REST APIs, and data processing pipelines using Java/Jakarta EE in a remote Ireland setting.

You will work with cloud, containers, ETL, and AI-assisted tooling, contributing to platform modernization and scalable architecture.