Senior Python Developer

Salary: 1000-1200 PLN/day on B2B + VAT

Work model: hybrid from Gdynia / Gdańsk / Warszawa (2/3 days per week from the office)

Why choose this offer?

• You can expect a flexible work organization
• The international work environment will give you the opportunity to interact with the English language on a daily basis
• Scandinavian organizational culture will provide you with work-life balance, you will gain time for additional training (financed by Jit)
• The Jit community will bring you a nice time during regular integration meetings

Project

You will be involved in a financial project focused on modernising legacy applications through AI-driven code migration and automation. The project aims to analyse existing codebases and transform them into modern, platform-approved technology stacks using agentic AI workflows, while integrating the process with CI/CD and deployment platforms.

Responsibilities you'll have

• Design, develop and improve AI-powered agent workflows for legacy code modernisation
• Build and maintain tooling for automated code analysis, migration and refactoring
• Develop solutions in Python following clean, maintainable software engineering practices
• Integrate AI-driven workflows with CI/CD and deployment platforms such as Tekton, ArgoCD and Ansible
• Work with LLMs, prompting, agentic coding tools and tool-use workflows
• Analyse legacy codebases and help transform them into modern, platform-approved technology stacks
• Collaborate with application teams to turn real migration cases into reliable and repeatable automation
• Experiment with different LLM providers, models and approaches in a vendor-agnostic environment
• Contribute to testing, evaluation and continuous improvement of AI-generated migrations
• Work with containerised environments using Docker and Kubernetes

Expected competences and knowledge

• Strong programming skills in Python
• Solid understanding of software engineering principles, including Git, code review, testing and clean code
• Practical knowledge of CI/CD and containerisation, with Docker and Kubernetes
• Hands-on experience with or strong interest in LLMs, prompt engineering and AI-assisted development
• Understanding of agentic AI concepts, including agents, tool use and agent workflows
• Ability to read and understand code written in different programming languages, including legacy technologies such as Java
• Experience with CI/CD and GitOps tools such as Tekton or ArgoCD
• Knowledge of Ansible or other Infrastructure as Code tools
• Familiarity with agentic coding tools such as Claude Code or similar solutions
• Knowledge of LLM evaluation, context engineering or Model Context Protocol (MCP)
• Experience with legacy modernisation, code migration or large-scale refactoring is a strong advantage
• Familiarity with Java/Spring, frontend technologies or other modern target stacks is a plus
• Experience working in enterprise or regulated environments, preferably banking
• Strong analytical and problem-solving skills, with a structured approach to experimentation
• Good communication skills in English and ability to work effectively in a collaborative team

Technologies you'll work with

• Python
• LLMs
• Anthropic
• Claude Code
• Maister
• MCP
• Tekton
• ArgoCD
• Ansible
• Docker
• Kubernetes
• Git
• Java
• Spring

Client - why choose this particular client from the Jit portfolio?

Jit Team has had an over-decade-long relationship with the leading financial group in the Nordic countries, and we are privileged to be our client's premier partner in Poland. At present, over 200 Jit personnel are engaged in the completion of more than 60 projects for this Norwegian major provider of financial services with a global presence and a strong focus on modern technology. Our customer's work atmosphere is epitomized by the Scandinavian culture, which is conducive to people who place emphasis on work-life balance and feedback culture. Furthermore, all projects are executed in international teams, giving constant exposure to the English language.

About Jit Team

The Human Factor of IT - it’s not just a slogan, it’s a philosophy. The foundation of Jit Team is people, which is why we prioritise you. We employ over 770 experienced experts, to whom we offer developmental projects, a wide range of benefits, and a proprietary professional development programme. Together with clients from around the world, we create innovative IT solutions delivered by highly specialised and efficient teams.

Behind our maxim are also charitable and educational activities. We support schools, universities, and educational institutions by conducting workshops, running educational projects, sponsoring events, and donating learning equipment. We offer internships that help launch careers in IT. We support water rescuers and hospitals by providing the necessary equipment. We also support numerous charitable organisations helping people in need, children, and the elderly. We are a Polish company and we share what we have achieved over more than 15 years of activity. By supporting local initiatives, we contribute to the circulation of good energy.