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?