Full Stack Developer – Java and Python Expertise

Full Stack Developer – Java and Python Expertise

Kraków-based opportunity with hybrid work model (up to 3 remote days per week)

Ignite innovation through full-stack development — craft solutions that reshape financial markets with cutting-edge technology.

As a Full Stack Developer, you will be working for our client, a leading player in the financial technology sector, within the AI Markets team. You will contribute to developing and supporting transformative natural language processing tools that revolutionize how institutional investors access real-time global markets data, enabling faster, smarter financial decisions. This role offers a unique chance to be at the forefront of AI-driven innovation in a dynamic, fast-paced environment that values continuous learning and mobility.

Your main responsibilities:

• Collaborate within a small, agile team of 4-6 members to deliver high-quality features iteratively from requirements to production.
• Take business requirements, break them into user stories, and implement solutions using Java and Python in an efficient, scalable manner.
• Participate in all phases of the development lifecycle, including analysis, testing, deployment, and production support, embodying the “build it, support it” philosophy.
• Identify and address technical debt, ensuring a sustainable balance between new development and system health.
• Design solutions aligned with technology standards, guidelines, and constraints while focusing on optimal performance and security.
• Pair with team members to share expertise, review code, and foster continuous improvement.

You're ideal for this role if you have:

• Minimum 4 years of experience in full stack development, ideally within financial or data-driven environments.
• Deep understanding of software development principles such as SOLID, Clean Code, DDD, and BDD.
• Proven experience with Java (especially Spring Framework) and Python.
• Solid knowledge of SQL/NoSQL databases, including PostgreSQL and MongoDB.
• Familiarity with microservices architecture and event streaming technologies is a plus.
• Experience with machine learning, NLP, AI, or Data Science is advantageous.
• Excellent communication skills in fluent English, both oral and written.
• Ability to work effectively in a hybrid environment and adapt to cross-geography collaboration.

It is a strong plus if you have:

• Experience with Prompt Engineering, LangChain, LangGraph, or Clean Architecture.
• Prior exposure to front-end platforms such as JavaScript, Vue, or React.

Language Required for the role:

• Fluent English (oral and written)

Eligibility for the role:

• Only candidates with an existing legal right to work in the European Union will be considered for this role.

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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.