Senior Java Engineer

CareerWise Recruitment; Galway; On-site; EUR 85,000 - 120,000; Full time

Job summary

CareerWise Recruitment is seeking a Senior Java Software Engineer for a Galway-based role. You will join R&D teams, shaping secure, scalable microservices and real-time telematics processing.

Responsibilities include building robust backend with Java 17+/Spring Boot, implementing RESTful APIs, and driving automated testing and DevOps automation in an Agile Scrum framework. On-site Mon-Thu with Fri work location choice, collaborating across data, firmware, cloud, and UX teams.

Qualifications

• 5+ years of hands-on software development with Java (Java 17/21+) and the core Spring framework (Spring Boot, Spring Security, Spring Data).
• Experience designing RESTful APIs and stateless microservices architectures.
• Strong SQL skills with PostgreSQL, MySQL, or Oracle.
• Proven testing background (JUnit, Mockito, Testcontainers) and robust error handling.

Responsibilities

• Architect scalable, secure microservices and RESTful APIs to process large telematics streams.
• Develop robust Java backend and Spring Boot applications in a multi-tenant setup.
• Establish automated tests and performance benchmarks for distributed workflows.
• Collaborate on secure CI/CD pipelines and containerized cloud deployments.
• Provide technical leadership, code reviews, and mentoring in an Agile Scrum context.
• Work across firmware, cloud services, and UI to deliver end-to-end features.

Skills

Java

Spring Boot

REST APIs

SQL

JUnit

CI/CD

Git

Maven/Gradle

Linux/UNIX

Agile/Scrum

Tools

Docker

Job description

A Senior Java Software Engineer is required by CareerWise Recruitment for our Galway based client. The Senior Java Software Engineer will join R&D teams and collaborate with specialists across Data Engineering, Data Science, Firmware/IoT, DevOps, UX, and Product Cybersecurity to design, scale, and maintain resilient microservices powering millions of connected assets and global transport units in real time. This role is based ON-SITE Monday to Thursday, work onsite with your colleagues & Fridays, choose your work location, balancing what your work requires.

Role of this position

Architecture & Scalable System Design: Partner with Product Management, Technical Architects, and engineering peers to architect secure, stateless, and high-performance multi-tenant microservices and RESTful APIs capable of processing massive telematics streams.

Core Backend Development: Deliver robust, maintainable, and production-grade code utilizing modern Java and Spring Boot, adhering to industry-leading design principles, code reuse patterns, and domain boundaries.

Resilience & Quality Engineering: Establish automated testing standards (unit, integration, and performance benchmarking) and diagnose complex issues across distributed, asynchronous workflows.

CI/CD & DevOps Automation: Collaborate closely with DevOps to build and maintain secure CI/CD pipelines, containerized environments, and cloud deployment lifecycles.

Technical Leadership & Mentorship: Champion engineering excellence through constructive code reviews, architectural discussions, knowledge sharing, and active mentoring of junior and mid-level software engineers.

Agile Collaboration: Drive features from concept to production within a fast-paced Agile Scrum framework, collaborating cross-functionally across firmware, cloud services, and user interfaces.

JOB REQUIREMENTS

• Java & Enterprise Ecosystem: 5+ years of hands-on software development experience with Java (Java 17/21+) and the core Spring framework (Spring Boot, Spring Security, Spring Data).
• Distributed Architecture & APIs: Demonstrated experience designing, implementing, and documenting RESTful APIs and stateless microservice architectures.
• Data Persistence & Relational Databases: Strong expertise in relational database modeling, complex SQL querying, indexing, and query optimization (e.g., PostgreSQL, MySQL, or Oracle).
• Testing & Quality Mindset: Proven background in test-driven practices, automated testing frameworks (JUnit, Mockito, Test containers), and robust error-handling design.
• DevOps & Tooling: Proficient with Git, standard build tools (Maven or Gradle), containerization concepts (Docker), and automated CI/CD pipelines.
• Operating Systems: Comfortable navigating and troubleshooting across both Linux/UNIX and Windows development and server environments.
• Agile Mindset & Communication: Excellent interpersonal, verbal, and written communication skills with proven autonomy in cross-functional Agile Scrum teams.

ADDED DESIRABLE SKILLS

• Cloud-Native Platforms: Practical experience building and deploying cloud infrastructure on AWS (e.g., ECS/EKS, Lambda, SQS, SNS, S3, RDS) or Azure.
• High-Throughput Streaming & Messaging: Familiarity with message brokers or event streaming platforms (e.g., Apache Kafka, RabbitMQ, MQTT) and IoT/telematics data pipelines.
• Multi-Tenant SaaS: Experience building multi-tenant data isolation and role-based access control (RBAC) models for enterprise SaaS.
• Front-End Familiarity: Working understanding of modern front-end technologies (e.g., React, TypeScript, HTML5/CSS3) for seamless full-stack feature collaboration.
• Observability & Scripting: Experience with observability stacks (Prometheus, Grafana, Open Telemetry, Datadog) and automation via Bash/Shell scripting.