June 12, 2026
Senior Full Stack Developer – Java, Python, Microservices
Senior • Hybrid
27,300 - 32,760 PLN
Krakow, Poland
Ignite innovation at the forefront of financial technology — design and develop transformative AI-driven solutions.
Krakow-based opportunity with hybrid work model (up to 3 remote days per week).
As a Senior Full Stack Developer, you will be working for our client, a leader in Global Markets Technology within the Corporate and Institutional Banking sector. You will be part of an award-winning AI Markets team, leveraging natural language processing (NLP) to revolutionize how institutional investors interact with global markets. This role offers a unique opportunity to contribute to cutting-edge digital services that shape the future of financial technology and accelerate your career growth.
Your main responsibilities:
- Collaborate within a team of 4-6 engineers alongside a dedicated product owner to deliver high-quality features.
- Break down business requirements into user stories and execute iterative deliveries to production.
- Engage in all phases of the development lifecycle, including analysis, testing, and production support.
- Maintain a focus on product support, ensuring solutions are sustainable and robust.
- Identify areas of technical debt and balance new functionality development.
- Design scalable, efficient solutions following established technology guidelines.
- Pair with team members to share knowledge and develop innovative system architectures.
You're ideal for this role if you have:
- At least 5 years of extensive development experience in software engineering.
- Deep understanding of software development principles (SOLID, Clean Code, DDD, BDD).
- Demonstrable expertise in Java and Python.
- Extensive experience with Spring Framework.
- Proficiency with SQL and NoSQL databases (PostgreSQL, MongoDB).
- Prior experience with event streaming technology and microservices architecture.
- Ability to collaborate and teach engineering teams to develop new systems.
- Effective written and spoken communication skills in English, fluent level.
It is a strong plus if you have:
- JavaScript / Vue.js experience.
- Knowledge or experience in machine learning, NLP, AI, data science, or prompt engineering.
- Familiarity with LangChain, LangGraph, and Clean Architecture principles.
Language required for the role:
- Fluent command of English, both written and spoken.
Eligibility to work in this role:
- Only candidates with an existing legal right to work in Europe will be considered for this role.
#MAKEYourCareerBETTER
Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.
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Krakow, Poland
23,520 - 30,240 PLN
🏢 Summary: Senior Fullstack Engineer role focused on designing and developing scalable, user-centric applications using Java and React in a hybrid Krakow-based environment. The position involves software architecture design, UI improvements, backend development, and DevOps-driven automation to enhance application stability and operational efficiency. The role supports digital transformation through robust system design and continuous service improvement. 🗂️ Requirements: Minimum 5 years of experience in Java production application development, Experience with front-end development using React, Strong proficiency in Java and Web API development, Experience in building secure and scalable backend services, Expertise in database design with PostgreSQL, Experience with T-SQL scripting, query optimization, performance tuning, Hands-on experience with CI/CD pipelines, Strong understanding of SDLC, Fluent English, Legal right to work in the European Union 📃 Skills: Java, React, WebAPI, PostgreSQL, T-SQL, SQL, CI/CD, DevOps, SDLC, AWS, Azure 🏢 Description: Unleash innovation by shaping the future of software architecture and user experience! Krakow-based opportunity with hybrid work model, offering flexibility and dynamic collaboration. As a Senior Fullstack Engineer – Java and React Development , you will be working for our client in the technology industry, focusing on designing scalable, efficient, and user-centric applications. You will contribute to creating cutting-edge solutions that enhance UX, application stability, and operational efficiency, supporting the digital transformation journey. Your main responsibilities: Participating in software architecture design to build robust systems. Leading UI enhancements and improvements to elevate user experience and application stability. Implementing solutions following best Design Patterns for maintainability and scalability. Analyzing requirements to fully understand solutions and recommending data-driven improvements. Creating comprehensive documentation for developed solutions to ensure clarity and knowledge sharing. Developing and testing application prototypes to validate concepts and designs. Managing changes through the Service Management lifecycle, ensuring smooth transitions. Contributing actively to automation initiatives and Service Management process improvements. Providing exceptional customer support by addressing issues promptly and effectively. Communicating with customers to understand needs and deliver tailored solutions. You're ideal for this role if you have: At least 5 years of professional experience in production applications development in Java, including front-end development with React. Strong proficiency in Java and Web API development, with a focus on building secure, scalable backend services. Expertise in database design, particularly with PostgreSQL, T-SQL scripting, query optimization, and performance tuning. Hands-on experience with DevOps practices like CI/CD pipelines. Deep understanding of the Software Development Life Cycle (SDLC), from requirements gathering to deployment and maintenance. Exceptional problem-solving skills with keen attention to detail, ensuring high-quality deliverables. It is a strong plus if you have: Experience with cloud platforms (e.g., AWS, Azure). Certifications in Java, React, or DevOps tools. Language Required for the role: Fluent English, with excellent communication skills. Eligibility for the role: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.