Remote Python Backend Engineer for AI-Driven LLM Pipelines

Polcode is a Poland-based software house working with clients worldwide since 2006. We build web, mobile, and eCommerce products for startups and well-established companies across Europe, the US, and beyond. What makes us different? We put people first while staying deeply tech-driven - People at heart | Technology in mind . We trust our teams, encourage ownership, share knowledge daily, and create a place where everyone can grow and feel at home. ??100% remotely (within Poland only) or in our office: WarszawaB2B: 90-140 PLN/H + VATHi, Polcode here!We're a global, people-first software house matching ambitious developers with challenging projects. Our team of over 100 professionals helps build and improve digital businesses, software platforms, eCommerce stores, websites, apps, and everything in between. And they're good at it.We're currently looking for a solid Mid/Senior Backend Engineer (Python) to join a long-term project for a US-based client building an innovative AI-powered platform for leasing agreementsThe product is already live and continuously evolving - this is not a greenfield project, but a growing system working with real users, real documents, and real data.In this role, you'll contribute to a key part of the platform responsible for extracting structured data from unstructured documents. The solution combines backend engineering, data processing pipelines, and LLM-powered workflows to turn complex document inputs into structured, usable data.This role is ideal for a strong backend engineer who is curious about AI systems and eager to learn how LLMs can be used in real production pipelines.Why this project is worth your attention:Long-term, stable project with no fixed end dateAI-powered product with real business value (document intelligence for leasing workflows)Opportunity to work on LLM-powered data extraction pipelines used in a production environmentStrong engineering focus - building reliable systems around AI rather than experimental prototypesDirect collaboration with experienced engineers and close contact with client-side technical leadership (CTO level)Small, focused international team (Poland + US)Production environment with real data, continuous releases, and ongoing product evolution.Get ready to:Work on a backend system responsible for extracting structured data from unstructured documentsDevelop and improve a data processing pipeline powered by LLMsBuild and maintain backend services using Python and FastAPIAnalyze and debug outputs generated by LLM models to improve pipeline accuracy and reliabilityExperiment with prompt strategies and processing logic to achieve better extraction resultsContribute to the evolution of an internal tool used for document data extractionCollaborate closely with engineers and technical stakeholders on the client sideWrite clean, maintainable, well-documented code and contribute to engineering best practices.What were looking for:Commercial experience as a Backend Engineer working with Python (mid-level or higher)Solid backend engineering fundamentals and experience building production systemsExperience building APIs and backend services (FastAPI or similar frameworks)Practical experience working with Docker and cloud-based environmentsStrong problem-solving mindset and ability to debug complex systemsCuriosity about how LLM-based systems and data extraction pipelines workWillingness to work across different parts of the system - from backend development to analyzing pipeline outputsStrong communication skills and ability to collaborate in an international teamEnglish at B2+ level for daily direct communication with a US-based clientAvailability for partial time overlap with the US team (until approx. 17–18 CET)Perks of being a #Polcoder:Multisport card, private medical care, life insurance, and meaningful gifts to celebrate important daysCompetitive salary with up to 20 paid days off (B2B) and development budgetAll the necessary equipment for comfortable workProfessional onboarding processWe respect your private life - no overtime, no weekend jobs, work-life balance only, promise!Work at times that suit your daily rhythm, from the place of your choiceYour work is appreciated - we believe in the power of feedback, as well as the one you give us.Our Recruitment ProcessHR InterviewSkill AssessmentOfferDevelop YourselfUse annual budgets for attending workshops, events, business trips, conferences and language lessons.Start Working FlexiblyGrow Like a ProDive into global projects tailored to your core strengths, while building new skills through each project.Get CoverageReceive a competitive salary backed by company benefits like Multisport, private medical care, English lessons or healthy spine classes with a physiotherapist.Be up-to-dateFeel the rhythm of the international IT market. We adapt only technologies that are up-to-date with the latest industry standards.Spend Time TogetherAttend after-hour parties and team-building events, face sports challanges and take part in other company activities. Make friendships that last over the years.J-18808-Ljbffr