Senior Java Backend Lead – SaaS Identity Platform

Daon; Dublin; Hybrid; EUR 90,000 - 150,000; Full time

Benefits offered by this job

Competitive salary and benefits

Flexible hybrid work model

Global collaboration opportunities

Job summary

Daon, a global leader in digital identity security, seeks a Senior Java Developer to design and build cloud‑based backend services powering the TrustX SaaS platform. You’ll collaborate across teams to deliver secure, scalable features and embrace AI tools like GitHub Copilot to boost productivity.

You will work in a hybrid model with at least three days in the office weekly, contributing to architecture, performance, and reliability while shaping the technical direction for identity verification

Qualifications

• 5+ years of experience developing backend or full‑stack software, ideally in SaaS environments.
• Strong proficiency in Java, with experience in frameworks like Spring Boot, Spring MVC, and Hibernate.
• Ability to understand end‑to‑end system design, data flows, integration points, and how cloud‑native systems behave in production.
• Experience with cloud platforms (AWS preferred) and containerization/orchestration (Docker, Kubernetes).
• Hands‑on experience with Git, build tools (Maven/Gradle), CI/CD pipelines, and modern development practices.
• A mindset focused on learning, growth, and continuous improvement, including adoption of AI‑assisted development tools.
• Exposure to observability tools (logs, metrics, traces) and performance debugging.
• Strong communication and collaboration skills—comfortable working with cross‑functional teams.
• Degree in Computer Science/Engineering or equivalent real‑world experience.

Responsibilities

• Design, develop, and maintain backend services built primarily with Java and Spring Boot.
• Implement REST APIs, service integrations, data processing pipelines, and backend logic supporting our core platform capabilities.
• Write maintainable, testable, and well‑structured code using modern engineering practices.
• Collaborate with frontend, mobile, DevOps, architects, and QA to ensure features are delivered holistically and integrate smoothly across the platform.
• Understand how backend components interact with UIs, cloud infrastructure, data stores, and external systems.
• Participate in design discussions and provide input on architecture, system behavior, performance trade‑offs, and scaling strategies.
• Use GitHub Copilot and other AI tools to accelerate development, improve code quality, and automate repetitive tasks.
• Help establish best practices for responsible, high‑value AI use within the engineering team.
• Participate in experimentation and adoption of new AI‑based development workflows.
• Write and maintain unit tests, integration tests, and automated test scenarios in collaboration with QA.
• Profile and optimize services for performance, throughput, and scalability.
• Contribute to improving observability (metrics, logs, tracing) in coordination with DevOps.
• Participate in code reviews and provide constructive feedback to peers.
• Collaborate with service delivery managers to ensure smooth deployment and production behavior.
• Support occasional troubleshooting efforts for complex defects or production issues.

Skills

Java

Spring Boot

System design

Cloud-native

AI-assisted development

Education

Degree in Computer Science/Engineering

Tools

Git

Maven/Gradle

CI/CD

Docker

Kubernetes

Job description

Daon, a global leader in digital identity security, seeks a Senior Java Developer to design and build cloud‑based backend services powering the TrustX SaaS platform. You’ll collaborate across teams to deliver secure, scalable features and embrace AI tools like GitHub Copilot to boost productivity.

You will work in a hybrid model with at least three days in the office weekly, contributing to architecture, performance, and reliability while shaping the technical direction for identity verification