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.