Senior Backend Engineer — Real-Time APIs (Hybrid Dublin)

Gaelvert Development; Dublin; Hybrid; EUR 90,000 - 125,000; Full time

Benefits offered by this job

Flexible hybrid

Prime Dublin location

Private Medical Insurance

Wellbeing allowance

Learning budget

Work from anywhere

Pension plan

Cycle to Work

Employee referral bonus

Income protection & life assurance

Job summary

Gaelvert Development in Ireland is seeking a Senior Software Engineer to own backend challenges, build real-time data APIs, and mentor a growing team. You'll work with Java 21, Spring Boot, and modern microservices, delivering reliable, scalable systems on time.

You’ll collaborate with architects, product managers, and peers, participate in code reviews, on-call rotations, and hiring processes. The role blends hands-on coding with technical leadership in a dynamic Dublin office with hybrid work.

Qualifications

• Bachelor's degree in Computer Science or equivalent practical experience.
• 5+ years backend software engineering delivering complex solutions.
• Proven experience designing high-throughput, low-latency APIs.
• Experience with event-driven architectures (Kafka or similar).
• Production systems with uptime/latency SLAs; real-time data a plus.
• Strong Java 21 skills; Spring 7+/Boot 4+/Security.
• REST, WebSocket, and async APIs; Spring WebFlux; reactive programming.
• Maven; CI/CD tools such as Bamboo or ArgoCD; Docker; Kubernetes.
• Git (Bitbucket/GitLab) and Jira for issue tracking.
• PostgreSQL: schema design, indexing; Liquibase a plus.
• Redis or similar caching systems.
• JUnit, TDD/BDD, Testcontainers, WireMock, SonarQube.
• Kafka/RabbitMQ production messaging; delivery guarantees.
• Monitoring: Prometheus, Micrometer, Grafana.
• Front-end basics (React/Angular) with TypeScript for tooling.
• Playwright for end-to-end tests.

Responsibilities

• Own and resolve complex technical issues, improving reliability and performance.
• Build, review, and mentor on code quality and system design.
• Participate in on-call rotations and incident reviews.
• Mentor engineers and support hiring and technical interviews.
• Collaborate with team leads, architects, product managers, and engineers.

Skills

Backend APIs

Java 21

Spring Framework

Reactive programming

CI/CD

Docker

Kubernetes

PostgreSQL

Redis

JUnit

Testcontainers

WireMock

SonarQube

Kafka/RabbitMQ

GIT/Jira

WebSocket

Playwright

Education

Bachelor's degree in CS or related

Tools

Maven

ArgoCD

Bamboo

Jenkins

GitLab

Job description

Gaelvert Development in Ireland is seeking a Senior Software Engineer to own backend challenges, build real-time data APIs, and mentor a growing team. You'll work with Java 21, Spring Boot, and modern microservices, delivering reliable, scalable systems on time.

You’ll collaborate with architects, product managers, and peers, participate in code reviews, on-call rotations, and hiring processes. The role blends hands-on coding with technical leadership in a dynamic Dublin office with hybrid work.