Java GenAI Developer

📍 Warsaw, Poland | Hybrid | B2B Contract | English-speaking environment

🌐 About Our Client

Our client is a globally recognised payments technology leader whose platforms power real-time financial transactions for millions of businesses, financial institutions and consumers worldwide.

At this scale, speed, security, resilience and performance are fundamental, and even milliseconds matter.

🛠 What You'll Do

• Design, develop and maintain scalable, high-performance Java applications and services

• Build REST APIs and microservices that meet strict security, reliability and performance standards

• Develop distributed systems using containerisation and orchestration (Docker, Kubernetes)

• Contribute to system design, code reviews, performance optimisation and production support

• Maintain CI/CD pipelines and automation, and drive engineering best practices

• Monitor applications and triage issues using Splunk / Humio and log analysis

• Use AI development tools to boost productivity and delivery speed

• Own your deliverables end-to-end within an Agile/Scrum team

✅ What You'll Bring

• 5+ years' experience in Java-based development

• Strong Java / J2EE with Spring, Spring MVC, JPA, Hibernate

• Proven REST API development, covering both producers and consumers, with security and reliability standards

• Microservices architecture and Docker / Kubernetes experience

• Databases: Oracle, MySQL and at least one NoSQL database

• Tooling: Git, Maven, Artifactory, Jenkins, CI/CD

• Logging and monitoring with Splunk, Humio or similar

• Hands-on use of AI coding tools (e.g. Claude, Cline or similar)

• Clean, standards-driven code with a zero-defect mindset and strong ownership of quality

• Excellent written and verbal English communication

🔥 Why Join

• Build systems designed for massive transaction volumes and extremely high availability

• Gain payments and fintech experience with a true global leader

• Work with a modern, cloud-native stack and AI-assisted engineering practices

• Collaborate with senior international engineering teams in a hybrid Warsaw setup

🌍 Global reach | ⚡ High performance | 🔐 Security | 💡 Innovation | 📈 Scale

👉 Apply now. Shortlisted candidates will hear from our team within 48 hours.

Skills tags: Java, Spring Boot, Microservices, REST APIs, Hibernate, Kubernetes, Docker, Jenkins, Oracle, Splunk