First seen by Alion on Sep 30, 2026.
Mid-Senior Java Full Stack Developer
Location: Warsaw (Hybrid, a minimum of 1 day per week in the office)
Contract type: B2B / Permanent
We are currently recruiting for an exceptional business that is widely recognised as one of the premier employers to work for in the region. They have earned a brilliant reputation in the local market for their inclusive workspace culture, highly advanced engineering standards, and top-tier technical challenges.
They are looking to expand their engineering team with a seasoned Full Stack Developer to focus on enterprise-grade business applications, robust backend services, and responsive frontend solutions. This position bridges traditional high-performance backend engineering with advanced work across microservices architectures, secure transaction protocols, and modern user interfaces.
What you will actually be doing:
Engineering Core Systems: Designing, developing, and maintaining production-grade full-stack applications using Java and Angular technologies.
Constructing Robust Backends: Building and enhancing efficient backend services, robust API layers, and critical business integrations.
Creating Frontend Solutions: Developing sleek, responsive, and highly user-friendly frontend interfaces using Angular and JavaScript.
Architecting Microservices: Developing and supporting distributed, microservices-based applications within modern containerised environments.
Owning the Lifecycle: Participating actively in application design, coding, rigorous testing, debugging, and end-to-end deployment activities.
Managing Integrations: Supporting complex system connections using REST APIs, HTTPS, SFTP, and SOAP protocols.
Optimising Delivery: Contributing to CI/CD pipeline implementation, automating deployment processes, and troubleshooting complex system bottlenecks.
Driving Quality: Ensuring pristine code quality through engineering best practices, comprehensive code reviews, and continuous improvement initiatives.
What they need from you:
Proven Experience: Between 5 to 7 years of professional software engineering experience explicitly focused as a Java Full Stack Developer.
Core Technical Mastery: Strong, hands-on expertise with Java, Spring Framework, and Hibernate.
Frontend Proficiency: Solid experience utilizing Angular and JavaScript for modern web application development.
Modern Architecture: A deep practical understanding of microservices architecture, containerisation technologies, and Linux operating systems.
Integration Expertise: A comprehensive grasp of REST APIs, SOAP services, HTTPS, and secure SFTP protocols.
DevOps Familiarity: Comfort operating within an Agile/Scrum environment using tools such as Git, GitHub, GitHub Actions, Maven, Jenkins, and Jira.
Database Knowledge: Strong working knowledge of MySQL and relational SQL databases.
Soft Skills: Natural communication skills paired with excellent analytical, troubleshooting, and root-cause analysis capabilities.
Highly Preferred:
Polyglot Versatility: Professional hands-on development experience or familiarity with Python.
Quality Focus: A proven ability to deliver high-quality, scalable, and highly maintainable software alongside cross-functional Product, QA, and DevOps teams.
Please apply with an updated CV if you are interested in discussing this opportunity further.

