Senior Python Developer (+ Docker)

Keystone AI supports one of the largest North American banks in enhancing and maintaining its financial libraries and applications. The bank serves over 17 million clients worldwide, employs more than 86,000 people, and offers a broad range of services including personal and commercial banking, wealth management, insurance, investor services, and capital markets products. Within this engagement, we are part of the structured rates products team, responsible for developing analytics services that support the pricing and initial valuation of financial instruments used across the bank’s systems and web-based applications. The solution is built using a microservices architecture, with communication handled via the Solace messaging system (pub/sub architecture). All microservices are deployed on the bank’s own Kubernetes cluster and are used by traders for the initial valuation of financial products before they are traded. Industry : Finance Location : Kraków / Hybrid/ Remote from Poland Your daily work will include: Develop and maintain backend functionality and integrate it with the frontend. Implement new features, optimize existing functionality, and fix bugs. Work together with other developers to deliver high-quality results Team & Collaboration > 20 people, and 7 from Montrose Regular meetings: Daily at 15:30 CET and weekly retrospective Communication : Chat, emails, ad hoc call Working hours: usually 9:00–17:00 CET Qualifications: Excellent knowledge of Python programming language with type hinting Large codebases, with hands on experience Ability to use Git version control system Docker / Kubernetes / ansible knowledge Unit testing skills Knowledge of Javascript / React Experience leveraging AI agents for software development Fluent in spoken and written English Nice to have: Familiarity with C++ Experience in a quantitative finance environment Experience in Linux/Windows management Please note that the interview process is divided into four parts: Technical phone screening (~30 minutes) Technical interview (~2 hours) Non-technical call with HR team (~30 minutes) Call with client for which you will be working Perks, Snacks & Everything Nice :) Work Environment & Flexibility Top-quality equipment to support your work Flexible working hours Remote work option Exciting and challenging projects with international teams Learning & Development English lessons with a native speaker Dedicated training budget for personal and professional growth Health & Well-being Private medical insurance Multisport card Air-conditioned workspace Showers available at the office Food & Comfort Lunches from Kraków’s top restaurants delivered to the office or a refund of the budget allocated for it Fully stocked kitchen with drinks, fruit, and snacks Lifestyle & Fun No dress code — dress comfortably Chillout area with bean bags, therapy balls, PlayStation 4, Nintendo Switch 2 + games, stretching area, and pull-up bar Regular team events Additional Perks Indoor bicycle parking Wyrażam zgodę na przetwarzanie moich danych osobowych przez Keystone AI zgodnie z Polityką Prywatności . English Version: I consent to Keystone AI processing my personal data according to the Privacy Policy Zapoznałem sie z Polityka Ochrony Sygnalistów Keystone AI. English Version: I consent to the Keystone AI Whistleblower Protection Policy.