Top Java Developer Jobs in Dublin

Design, develop, and maintain scalable Java applications and batch processing systems. Build and deploy cloud solutions using AWS services, design and optimize database schemas and SQL, troubleshoot performance, conduct code reviews and testing, collaborate with cross-functional teams, resolve bugs and performance issues, and mentor junior developers.

Design, build, and maintain efficient, reusable Java backend systems; translate business requirements into applications; optimize performance and stability; review and test code for quality and security; identify and fix bottlenecks and bugs; maintain code quality and system responsiveness.

Design, develop, and maintain server-side Java applications and scalable APIs. Work with relational and NoSQL databases, integrate third-party services, implement security best practices, optimize performance, test backend components, document systems, and collaborate with front-end, QA, and design teams.

Design, develop, and deliver Java/J2EE Spring-based multi-layer applications and APIs. Create web services, database schemas, PL/SQL/stored procedures on DB2/Oracle. Collaborate on design, code reviews, testing, and CI/CD with Jenkins/uDeploy, enforce code quality (Sonar), and coordinate across technical teams while supporting process improvements.

Design, develop, and maintain high-performance, secure Java backend services and APIs. Ensure reliability, scalability, and cost-efficiency across microservices, databases, messaging systems, and capacity planning. Troubleshoot, profile, benchmark, and optimize systems (including ML applications) and collaborate with Kazakhstan stakeholders.

Design, implement, and scale Elasticsearch distributed systems: improve concurrent indexing, maintain cluster coordination, optimize performance at petabyte scale, debug concurrency and performance issues, and lead cross-engineer projects.

Design, develop, and deploy high-volume, low-latency Java applications and microservices. Lead full development lifecycle, write testable code, manage releases, improve architecture, and support Agile/Scrum processes.

Design and build backend and frontend functionality using Java and Angular. Develop features, maintain code quality, write unit and integration tests, perform peer code reviews, support system testing, and resolve defects in standards-driven environments.

Lead and coach a distributed agile delivery team while remaining hands-on in designing, developing, and maintaining cloud-native Java/Spring Boot microservices. Drive adoption of engineering best practices, DDD, container orchestration (Kubernetes/Rancher), event streaming (Kafka), PostgreSQL-backed services, and testing/CI-CD disciplines to uplift offshore engineers and improve team delivery effectiveness.

Serve as a senior Java full-stack engineer building and maintaining backend services for blockchain applications, integrate APIs with React/Vue frontends, design scalable enterprise blockchain solutions, troubleshoot complex backend issues, and collaborate with cross-functional teams to apply best practices.

Optimize and scale blockchain node performance, design and implement core system plugins, collaborate across teams to integrate blockchain solutions, conduct performance testing and debugging, and stay current on blockchain and infrastructure trends.

Design and build scalable Java backend services and REST APIs, lead technical design, integrate third-party partners, champion engineering best practices (CI/CD, testing, observability), mentor engineers, and troubleshoot production issues while promoting reliability and performance.

Develop and maintain the Prime Sequel Platform's P&L allocation engine. Design scalable Java microservices, perform feasibility analysis, lead SDLC phases, ensure performance and compliance, mentor junior engineers, and collaborate with global stakeholders to deliver robust, production-grade financial systems.

Lead architecture and implementation of usage-based billing and metering systems. Ensure data accuracy, reliability, and security; integrate billing with Stripe, marketplaces, and CRM; mentor engineers, define backend patterns in Go, and improve observability and operational standards.

Design, build, test, and maintain Java backend services and event-driven integrations; develop Angular user interfaces; improve CI/CD, observability, and automation; participate in design/code reviews and mentor junior engineers.

Senior backend engineer responsible for designing, developing, testing and deploying on-premise and cloud microservices for an AI-driven digital pathology product. Work with cross-functional agile teams, use containerization and cloud tech, support monitoring and troubleshooting, drive development best practices, and complete required regulated-environment compliance training.

The Senior Java Developer will lead the design and implementation of scalable solutions, mentor junior members, and collaborate effectively with stakeholders to enhance system capabilities and drive innovation within the team.

Design and improve Elasticsearch distributed-systems components for consistent, concurrent indexing and cluster coordination. Scale shards, nodes, and petabyte datasets, diagnose performance and concurrency issues, support operations/support teams, and own end-to-end projects including technical design and cross-team development.

Design, develop, and maintain BankWorld product features in a Scrum team. Implement secure, high-quality Java-based solutions, integrate AI/LLM tooling, support and troubleshoot production issues, participate in code reviews, and adopt AI-driven testing and automation. Provide occasional out-of-hours support and contribute to continuous improvement.

As an Automation QA Engineer, you'll test payment integrations, define test scope, develop automation plans, and build reliable automated tests to ensure product quality and continuous improvement.

Design, build, deploy and maintain high‑load Java/Spring systems processing massive data volumes (>1TB/day). Work with big data, ETL pipelines, Postgres/SQL, microservices and CI/CD to improve reliability, test coverage, scalability and monitoring of production services.