Senior Full Stack Engineer – AI and Markets Technologies

Unleash your full potential — shape the future of financial technology with cutting-edge AI and market solutions! Krakow-based opportunity with hybrid work model (up to 3 remote days per week). As a Senior Full Stack Engineer – AI and Markets Technologies, you will be working for our client, a leader in financial services technology, within the Markets & Securities Services division. You will contribute to innovative AI-driven solutions that transform how investors and institutions navigate the complexities of global markets. Join a team committed to pushing boundaries and delivering industry-leading digital innovations that open new opportunities for clients worldwide. Your main responsibilities: • Lead the full lifecycle development of sophisticated AI and market technology applications, from analysis through to deployment and support. • Collaborate closely with product owners to understand requirements, challenge assumptions, and deliver incremental value. • Own end-to-end ownership of features, ensuring robustness, scalability, and security. • Support and maintain production environments, ensuring high availability and performance. • Drive automation initiatives and develop tools to streamline workflows across the team. • Mentor and pair with team members to foster a culture of continuous learning and innovation. • Identify and address technical debt to maintain a healthy, scalable architecture. • Contribute to documentation, blogs, and knowledge sharing to elevate team expertise and technical visibility. You're ideal for this role if you have: • At least 6 years of experience in software engineering, with a focus on full stack development. • Proficiency in Python for backend development, especially for AI and LLM applications. • Strong knowledge of RESTful API design, service integration, and cloud deployment (Azure OpenAI or similar). • Solid SQL skills and experience with LLM observability tools like LangFuse or LangSmith. • Hands-on experience with prompt engineering, RAG pipelines, and multi-step workflows using LangChain or LangGraph. • Proven problem-solving ability, analytical mindset, and decision-making skills. • Experience with DevOps practices, automation, and tools supporting continuous delivery. It is a strong plus if you have: • Working knowledge of Java enterprise ecosystems and Unix/Linux environments. • Familiarity with multi-LLM routing frameworks such as LiteLLM. • Skills in columnar data formats like Parquet, or analytical databases such as DuckDB. Language Required for the role: Fluent English — excellent command, both spoken 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. #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.