April 8, 2026
Senior Python Engineer
Senior • Remote
33,600 - 42,000 PLN
Warsaw, Poland
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.
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🏢 Summary: Senior Python Developer role focused on designing, building, and enhancing scalable Python and Django applications with complex system integrations. The position involves developing REST and SOAP-based services, optimizing SQL and database structures, integrating GenAI capabilities, and supporting DevOps pipelines on Azure. You will collaborate with cross-functional teams to deliver secure, high-quality enterprise solutions. 🗂️ Requirements: Bachelor's degree in Computer Science, MIS, or related field, 3+ years of experience with Python and Django, Strong SQL development and database design experience, Experience with GenAI technologies (GPT, embeddings, agents), Expertise in application architecture and system integration, Proficiency in Microsoft Azure, Experience with CI/CD pipelines and DevOps practices, Familiarity with Git and Azure DevOps, Advanced knowledge of REST, SOAP, and WSDL 📃 Skills: Python, Django, SQL, REST, SOAP, WSDL, Azure, Git, AzureDevOps, CI/CD, GenAI, GPT, Embeddings, Agents, Bootstrap, jQuery, CSS 🏢 Description: We are looking for a Senior Python Developer to design, build, and improve Python and Django applications. The role includes developing end-to-end integrations using REST and SOAP services and delivering reliable, scalable solutions through hands-on coding and data transformation work. In this role, you will collaborate closely with Business Analysts, architects, and other teams to ensure technical solutions support business needs, while also improving SQL performance, participating in code reviews, supporting DevOps workflows, and helping integrate GenAI features into enterprise applications. Responsibilities Design and develop Python and Django applications that are scalable, secure, and maintainable Implement UI components using CSS, Bootstrap, jQuery, or similar technologies as needed Develop integrations with internal and external systems using REST, SOAP, and WSDL-based services Create and optimize SQL queries, database structures, and data access logic to support application features Collaborate with Business Analysts and stakeholders to translate functional requirements into technical specifications and solutions Implement accurate data mappings and transformations in accordance with business and technical requirements Contribute to code reviews, follow established coding standards, and ensure high-quality deliverables Support the implementation and maintenance of DevOps pipelines using Git and Azure DevOps Integrate GenAI capabilities — including GPT models, embeddings, and agent-based components — into enterprise applications Troubleshoot issues across the application stack and collaborate closely with peers to resolve technical challenges Requirements Bachelor's degree in Computer Science, MIS, or a related field 3+ years of hands-on experience with Python and Django, including complex application development Strong experience in SQL development, optimization, and database design Experience with GenAI technologies such as GPT models, embeddings, and agents Expertise in application architecture, system integration, and service-oriented design Proficiency in Microsoft Azure, along with strong background in DevOps tools and practices, including CI/CD pipelines and automated deployments Familiarity with Git and Azure DevOps for source control and pipeline management Advanced understanding of REST, SOAP, and WSDL for large-scale service integrations Skills in analytical thinking, problem-solving, and architectural reasoning Proven ability to work effectively in fast-paced, collaborative environments Exceptional verbal and written communication skills Nice to have Knowledge of Generative AI fundamentals Background in the Insurance domain Advanced certifications in Python, cloud technologies, or GenAI We offer We gather like-minded people: Engineering community of industry professionals Friendly team and enjoyable working environment Flexible schedule and opportunity to work remotely within Poland Chance to work abroad for up to 60 days annually Business-driven relocation opportunities We provide growth opportunities: Outstanding career roadmap Leadership development, career advising, soft skills, and well-being programs Certification (GCP, Azure, AWS) Unlimited access to LinkedIn Learning, Get Abstract, Cloud Guru English classes We cover it all: Stable income (Employment Contract or B2B) Participation in the Employee Stock Purchase Plan Benefits package (health insurance, multisport, shopping vouchers) Strategically located offices featuring entertainment and relaxation zones, table tennis and football, free snacks, fantastic coffee, and more Referral bonuses Corporate, social and well-being events Please, note: The set of bonuses might vary based on the role you apply for – specifics will be discussed with our recruiter during the general interview. We will reach out to selected candidates exclusively. EPAM is a leading global provider of digital platform engineering and development services. We are committed to having a positive impact on our customers, our employees, and our communities. We embrace a dynamic and inclusive culture. Here you will collaborate with multi-national teams, contribute to a myriad of innovative projects that deliver the most creative and cutting-edge solutions, and have an opportunity to continuously learn and grow. No matter where you are located, you will join a dedicated, creative, and diverse community that will help you discover your fullest potential.
Technology
Dawid Wierciak Flow to Grow
Senior Python Engineer
Senior
Remote
Warsaw, MZ, Poland
130 - 145 PLN/hr
🏢 Summary: Senior Python Engineer role focused on building and deploying enterprise-grade, AI-powered solutions in a cloud-based microservices environment for a large-scale professional services project. The position involves end-to-end development of scalable Python applications, integration of Generative AI and LLM capabilities, and technical leadership within a cross-functional team. Offered as a remote B2B contract with a competitive hourly rate. 🗂️ Requirements: 5+ years of commercial experience in software development, Strong hands-on experience with Python and FastAPI, Practical knowledge of Pydantic for schema modelling and data validation, Experience with asyncio and asynchronous/parallel programming, Experience with Generative AI and Large Language Models in real business use cases, Understanding of RAG pipelines and hybrid search with vector databases, Strong analytical and problem-solving skills, Very good organizational and self-management skills, Strong troubleshooting and communication skills, English level Intermediate+ 📃 Skills: Python, FastAPI, Pydantic, asyncio, LLM, RAG, LangChain, LangGraph, Azure, MongoDB, AzureSQL, Angular, Kendo, GitHub, Copilot, Docker, Kubernetes, .NET, ASP.NET, Microservices 🏢 Description: For our client we are looking for an experienced Senior Python Engineer to join a modern technology initiative delivered for one of the Big Four firms - the world's largest professional services network, headquartered in London and operating across more than 150 countries. The team behind this project is responsible for designing, building, and deploying enterprise-grade tools and AI-powered solutions that support tax service delivery. It is a cross-functional environment bringing together experts in software engineering, tax, project management, and change management. The scope of work includes solution design, implementation, rollout, training support, and broader stakeholder collaboration. Tech stack Azure Cloud, Microservices Architecture, .NET 8, ASP.NET Core services, Python, MongoDB, Azure SQL, Angular 18, Kendo, GitHub Enterprise with Copilot, LangGraph, LangChain, RAG Pipelines, Multi-modal LLMs Responsibilities Analyse business and technical requirements, contribute to system design, and support end-to-end Python and AI solution development Build, enhance, and maintain scalable Python applications using FastAPI and Pydantic Develop asynchronous and parallel processing solutions with asyncio Perform detailed code reviews to ensure consistency with engineering standards and maintain high code quality Integrate and test multi-modal GenAI capabilities, including areas such as text-to-image and text-to-audio Work effectively both independently and as part of a collaborative team Support day-to-day team coordination by giving clear guidance and helping organize ongoing work Stay in regular contact with the client and support smooth communication Provide technical leadership within the team by mentoring others, coaching colleagues, and setting a strong example Requirements 5+ years of commercial experience in software development Strong hands-on experience with Python and FastAPI Good practical knowledge of Pydantic for schema modelling and data validation Experience with asyncio and asynchronous / parallel programming Practical experience with Generative AI and Large Language Models, including building agentic AI solutions for real business use cases Good understanding of RAG pipelines and hybrid search with vector databases Strong analytical thinking and problem-solving skills, with close attention to detail Pragmatic mindset and the ability to balance process, structure, and flexibility in delivery Very good organizational skills, including self-management, prioritization, and effective work under deadlines Strong troubleshooting and communication skills English level: Intermediate+ Nice to have Experience with Azure Cloud services or other major cloud platforms, including SaaS tools such as Service Bus, Data Lake, Blob Storage, Redis, and similar solutions Familiarity with agentic protocols such as MCP and A2A Hands-on experience with the LangGraph ecosystem, especially long-term memory, state management, and human-in-the-loop workflows Familiarity with .NET Experience with Docker and Kubernetes Solid understanding of microservices architecture and scalable distributed systems Offer rate: 140 - 160 pln B2B remote
Technology
Yard Corporate
Senior Python Engineer
Senior
Hybrid
Warsaw, Poland
40,000 - 55,000 PLN
🏢 Summary: Senior Python Engineer role focused on building and scaling a cloud-native real-time Data Platform handling massive datasets. The position involves developing high-performance backend services, optimizing distributed systems, and integrating large-scale data storage solutions. Hybrid work model in Warsaw with employment benefits including private medical care and multisport card. 🗂️ Requirements: 8+ years of backend software development experience, Advanced Python expertise, Experience with scalable production-grade systems, Knowledge of concurrency and multiprocessing, Experience with Pandas or NumPy, Experience with Parquet or JSON data formats, Knowledge of relational and NoSQL databases, Experience with performance optimization and low-latency systems, Ability to use AI-assisted development tools responsibly 📃 Skills: Python, Pandas, NumPy, Parquet, JSON, SQL, NoSQL, API, OOP, Concurrency, Multiprocessing, Algorithms, Databases, Cloud 🏢 Description: For our client, a leading, high-growth global fintech company – we are looking for an experienced Senior Python Engineer to join a key engineering team responsible for the company’s core data foundation. The project focuses on building, optimizing, and scaling a cloud-native, high-throughput Data Platform designed to ingest, process, and distribute massive datasets in real-time. This platform serves as the backbone for various downstream analytical systems, requiring extreme reliability, performance, and scalability. This is a fantastic opportunity for a strong Python generalist who enjoys solving complex distributed system problems, optimizing data flows, and working with modern cloud architectures. Responsibilities Backend & Pipeline Development: Design and develop scalable backend services and high-performance data processing pipelines using Python. Performance Tuning: Identify bottlenecks and optimize system performance, focus on concurrency, throughput, and low-latency execution. Data Integration & Storage: Build robust integrations with modern cloud-native storage solutions and databases to manage large-scale datasets efficiently. Collaborative Engineering: Work closely with cross-functional technical teams to understand data requirements and deliver reliable API services and platform features. Engineering Excellence: Maintain top-tier coding standards, emphasizing clean code, robust testing (unit/integration), automation, and security. Requirements 8+ years of professional backend software development experience (with a strong track record in building scalable, production-grade systems). Deep expertise in Python (advanced OOP, concurrency/multiprocessing, memory management, data structures, and algorithms). Solid experience with data-centric libraries such as Pandas, NumPy, or similar data processing frameworks. Experience with large-scale data storage formats (e.g., Parquet, JSON, or column-oriented databases) and relational/NoSQL databases. AI-assisted development mindset: Comfortable utilizing AI tools to accelerate delivery, while maintaining strong developer judgment regarding validation, testing, security, and refactoring. What our client offers: Hybrid work model in Warsaw (minimum 3 days a week in the office - strictly non-negotiable). Contract of Employment (UoP) with increased tax-deductible costs (KUP). Private medical care (including full dental care). Lunch card to cover your daily meals. Multisport card.