Senior Python Engineer

We are looking for a highly experienced Senior Python Developer with a strong track record of modernizing legacy systems. This is a hands‑on engineering role for someone who excels at solving complex technical problems and improving existing codebases.   Tasks • Modernize and refactor legacy applications using Python, modern Python web frameworks, and SQLAlchemy. • Apply AI‑assisted development tools to analyze and refactor legacy code. • Improve code quality, maintainability, and system reliability in a regulated environment. • Contribute to scalable architecture design and long‑term technical improvements. • Drive continuous enhancement of our technology infrastructure. • Work directly in the codebase—debugging, refactoring, implementing, and delivering. Expectations   • 10+ years of professional Python development experience. • Proven experience modernizing legacy systems and migrating them to modern architectures. • Strong SQLAlchemy knowledge and experience with complex data models. • Practical experience using AI tools to support code refactoring or analysis. • Solid understanding of code quality standards in regulated industries; Pharma compliance experience is a plus. • Ability to design scalable, maintainable solutions. • Hands‑on mindset—comfortable working directly with legacy code.   We offer • • Ongoing support from a dedicated agent, taking care of your project continuity, client contact, necessary formalities, work comfort and development,  • Consultant Development Program – advice on growth planning based on the latest trends and market needs in IT, including consultations with agents and growth mentors,  • Access to 7N Learning & Development – a development and educational platform with webinars, a library of articles and industry reports, and regular invitations to one-time and recurring development events – technical, business, and lifestyle,  • Spectacular integration events, both for you (e.g., annual Kick-Off trip, Christmas parties, or Summer Olympics sports events) and for your loved ones (e.g., family picnics, movie premieres),  • Professional development not only during the project – you can get involved in knowledge transfer to others within the 7N Services offering directed at 7N clients,  • Relationships and access to the knowledge of the most experienced IT experts in the market – the average professional tenure of our consultants in Poland is over 10 years,  • A complete benefits package, including funding for medical care, life insurance, sports cards for you and your loved ones, as well as discounts in stores in Poland and abroad.