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.