Java Full Stack Developer

🚀 Senior Full Stack Java Developer
📍 Hybrid | 1 day from the office in Gdańsk or Warsaw
Are you an experienced Full Stack Developer passionate about building secure, scalable applications and leveraging the latest AI-powered development tools? Join our team and help shape innovative solutions within the payments and fintech space.
We're looking for a Senior Software Engineer who combines strong Java expertise with a modern engineering mindset and enthusiasm for Agentic AI technologies such as GitHub Copilot, ChatGPT, Claude, and Cline.
💡 Your Mission
As a Senior Full Stack Java Developer, you will:
🔧 Development & Engineering
• Design, develop, and maintain enterprise-grade full-stack applications.
• Build scalable backend services using Java, Spring Boot, and Spring Security.
• Develop modern, responsive user interfaces using React, Angular, or Vue.js.
• Optimize database interactions using Hibernate/JPA.
• Design and implement secure solutions for handling sensitive financial data.
• Participate in the full software development lifecycle—from concept to deployment.
🤖 AI-Powered Development
• Utilize Agentic AI tools to accelerate development and improve code quality.
• Apply AI solutions for coding, testing, documentation, and troubleshooting.
• Explore and adopt emerging AI technologies to enhance engineering efficiency.
• Share AI best practices and drive innovation within the team.
⚙️ CI/CD & DevOps
• Build and maintain Jenkins CI/CD pipelines.
• Automate testing, deployment, and release processes.
• Improve development workflows and delivery speed.
✅ Quality & Testing
• Create and maintain unit and integration tests using JUnit and Mockito.
• Participate in code reviews and quality assurance initiatives.
• Debug and solve complex technical challenges.
🤝 Collaboration
• Work closely with Product Managers, QA Engineers, Designers, and fellow Developers.
• Participate in Agile/Scrum ceremonies.
• Contribute to technical documentation and knowledge sharing.
🎯 Must-Have Skills
Backend
✔️ 5+ years of commercial Java development experience
✔️ Strong expertise in:
• Java
• Spring Boot
• Spring Security
• Hibernate/JPA
✔️ Experience building RESTful APIs
✔️ Experience with microservices and distributed systems
Frontend
✔️ Solid knowledge of:
• HTML5
• CSS3
• JavaScript
✔️ Hands-on experience with:
• React
• Angular
• Vue.js
DevOps & Infrastructure
✔️ Jenkins CI/CD
✔️ Docker & Kubernetes
✔️ MySQL, PostgreSQL, or Oracle
Engineering Practices
✔️ Software architecture and design patterns
✔️ Agile/Scrum methodologies
✔️ Understanding of cryptography, encryption, digital signatures, and key management
⭐ Nice to Have
• Experience with AWS, Azure, or GCP
• Android or iOS development experience
• Open-source contributions
• Technical blogging or community involvement
💳 FinTech & Payments Experience
• 2+ years in fintech, payments, or financial services will be great (nice to have)
• Knowledge of ISO 8583, EMV, and PCI DSS
• Experience with HSMs and key management systems
• Familiarity with tokenization and real-time payment systems
• Understanding of financial compliance and regulations
🎁 What You'll Get
✨ Opportunity to work on innovative fintech products
✨ Exposure to cutting-edge AI-powered development practices
✨ Hybrid work model (Gdańsk or Warsaw)
✨ Collaborative and supportive engineering culture
✨ Influence on architecture and technical decisions
✨ Continuous learning and professional growth opportunities
🚀 Ready to build the future of fintech with AI-enhanced engineering?
Apply now and join a team where modern technology, innovation, and engineering excellence come together.