Senior Python Developer

🏢 Summary: Senior Python Engineer role focused on building and maintaining production-grade data tooling and pipelines for large-scale, time-series and event-based datasets in a high-demand environment. The position involves optimizing data workflows, ensuring data quality and observability, and working with analytical databases. Onsite employment contract in Wrocław with competitive salary and impact on internal data platforms. 🗂️ Requirements: Minimum 7 years of commercial experience with Python as primary language, Strong hands-on experience with Pandas, NumPy, Polars, Dask or similar Python data tools, Experience working with time-series, event-driven or large historical datasets, Strong SQL skills, Hands-on experience with analytical databases or data platforms (e.g. ClickHouse, Snowflake, BigQuery, Redshift, Databricks, Druid), Experience building production data pipelines, internal tools or reusable Python components, Practical approach to data quality, debugging, monitoring and performance optimisation, English proficiency at C1 level 📃 Skills: Python, Pandas, NumPy, Polars, Dask, SQL, ClickHouse, Snowflake, BigQuery, Redshift, Databricks, Druid 🏢 Description: Senior Python Engineer 📍 Wrocław, Poland | Onsite 📄 Employment contract 💰 Up to 50,000 PLN gross/month We are looking for a Senior Python Engineer to join a team building data tooling, libraries and production pipelines used in a high-scale, technically demanding environment. You will work closely with large historical, time-series and event-based datasets, helping improve how data is processed, validated, monitored and made available to technical teams. What you will work on Building and maintaining production-grade Python tools, libraries and data pipelines Working with large-scale historical, time-series and event-based datasets Improving data quality, validation, observability and monitoring Optimising data-processing workflows and pipeline performance Writing SQL queries and working with analytical databases and data platforms Collaborating with engineers and technical users to improve internal data workflows Solving practical problems around data reliability, scale and performance What we are looking for min. 7 years of commercial experience with Python as your primary programming language Strong hands-on experience with Pandas , NumPy , Polars , Dask or similar Python data tooling Experience working with time-series, event-driven or large historical datasets Strong SQL skills Hands-on experience with analytical databases or data platforms such as ClickHouse , Snowflake , BigQuery , Redshift , Databricks , Druid or similar Experience building production data pipelines, internal tools or reusable Python components A practical approach to data quality, debugging, monitoring and performance optimisation Good English communication skills (C1) What is offered Employment contract Salary up to 50,000 PLN gross per month Onsite work in Wrocław A chance to work on technically challenging, data-heavy problems Real influence on tools and workflows used by experienced technical teams International working environment and collaboration with strong engineering profiles If you enjoy Python, large-scale data and building reliable tools that make other teams more effective, we would be happy to speak with you!

🏢 Summary: Senior Python Developer role in a full-stack AI-native team building an advanced quantitative investment platform. The position focuses on designing and developing scalable back-end systems using FastAPI and Python, with strong emphasis on security, performance, and AWS-based infrastructure. The project delivers an AI-driven investment ecosystem aimed at transforming decision-making through systematic and intelligent solutions. 🗂️ Requirements: Bachelor's degree in Computer Science, Engineering or related field or equivalent experience, 3+ years of back-end development experience with Python, Commercial experience with FastAPI, Strong knowledge of server-side logic, Experience with database management, Expertise in AWS, Experience building REST APIs, Experience with Git, B1+ English proficiency 📃 Skills: Python, FastAPI, AWS, REST, Git, SQL, GenAI, ReactJS, Cursor 🏢 Description: We are looking for a dynamic, hands-on Senior Python Developer to join a full-stack AI native feature team for building a cutting-edge quantitative investment platform. The project aims to deliver a groundbreaking, AI-driven investment ecosystem that revolutionizes the entire investment process through an intuitive and human-centric design approach. This initiative transcends mere digitization, aiming to redefine investment decision-making with systematic, transparent and intelligent solutions. The platform is designed with the versatility to cater to a wide array of users and offers transformative capabilities for the investment landscape. Responsibilities Design, develop, and maintain robust and scalable back-end systems using FastAPI and Python Implement security and data protection measures to ensure the integrity and confidentiality of data Optimize applications for maximum speed and scalability Develop and maintain RESTful APIs for seamless communication between different components of the application Conduct code reviews and provide mentorship to ensure code quality and adherence to best practices Troubleshoot and resolve complex technical issues and bugs in a timely manner Stay up-to-date with the latest industry trends and technologies to continuously improve development processes and system performance Requirements Bachelor's degree in Computer Science, Engineering, or a related field, or equivalent practical experience 3+ years of proven experience as a Back-End Developer with a focus on FastAPI and Python Strong understanding of server-side logic and database management Expertise in Amazon Web Services Knowledge of FastAPI and REST API Background in Gen AI Assisted Development Familiarity with version control systems such as Git Excellent problem-solving skills and attention to detail Strong communication and collaboration skills Ability to work independently and as part of a team in a fast-paced environment B1+ English level proficiency Nice to have Skills in Cursor Proficiency in ReactJS 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.

🏢 Summary: Senior Python Developer role within an AI-native full-stack team building a cutting-edge quantitative investment platform. The position focuses on developing scalable back-end systems and RESTful APIs using FastAPI and Python, ensuring security, performance, and cloud integration. The project delivers an AI-driven, human-centric investment ecosystem transforming decision-making processes. 🗂️ Requirements: Bachelor's degree in Computer Science, Engineering or related field or equivalent experience, 3+ years of back-end development experience with FastAPI and Python, Strong knowledge of server-side logic and database management, Expertise in Amazon Web Services, Experience with FastAPI and REST API development, Background in Gen AI assisted development, Proficiency with Git or other version control systems, B1+ English proficiency 📃 Skills: Python, FastAPI, REST, AWS, Git, GenAI, Databases 🏢 Description: We are looking for a dynamic, hands-on Senior Python Developer to join a full-stack AI native feature team for building a cutting-edge quantitative investment platform. The project aims to deliver a groundbreaking, AI-driven investment ecosystem that revolutionizes the entire investment process through an intuitive and human-centric design approach. This initiative transcends mere digitization, aiming to redefine investment decision-making with systematic, transparent and intelligent solutions. The platform is designed with the versatility to cater to a wide array of users and offers transformative capabilities for the investment landscape. Responsibilities Design, develop, and maintain robust and scalable back-end systems using FastAPI and Python Implement security and data protection measures to ensure the integrity and confidentiality of data Optimize applications for maximum speed and scalability Develop and maintain RESTful APIs for seamless communication between different components of the application Conduct code reviews and provide mentorship to ensure code quality and adherence to best practices Troubleshoot and resolve complex technical issues and bugs in a timely manner Stay up-to-date with the latest industry trends and technologies to continuously improve development processes and system performance Requirements Bachelor's degree in Computer Science, Engineering, or a related field, or equivalent practical experience 3+ years of proven experience as a Back-End Developer with a focus on FastAPI and Python Strong understanding of server-side logic and database management Expertise in Amazon Web Services Knowledge of FastAPI and REST API Background in Gen AI Assisted Development Familiarity with version control systems such as Git Excellent problem-solving skills and attention to detail Strong communication and collaboration skills Ability to work independently and as part of a team in a fast-paced environment B1+ English level proficiency Nice to have Skills in Cursor Proficiency in ReactJS 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.

🏢 Summary: Leadership role combining hands-on software engineering with team management to build and scale AI-powered SaaS systems. The position focuses on driving architecture, delivering distributed cloud solutions, and developing AI and agentic workflows using modern technologies. You will mentor engineers while owning technical direction for scalable, production-ready AI services. 🗂️ Requirements: 5+ years of software engineering experience, Experience leading or mentoring engineers, Strong experience with distributed systems, Experience building SaaS applications, Hands-on experience with backend technologies, Experience with cloud platforms, Experience with AI or LLM systems, Ability to drive architecture and technical delivery 📃 Skills: Python, React, MongoDB, Redis, AWS, Azure, LLM, MCP, A2A, SaaS, Cloud, AI, DistributedSystems 🏢 Description: Team Lead- Software Engineer BigTime is looking for an experienced Team Lead- Software Engineer to lead and grow a team building the future of AI-powered software. This role combines people leadership, technical ownership and AI innovation . You’ll mentor engineers, drive delivery and help shape next-generation AI solutions used by thousands of professional services companies worldwide. About BigTime BigTime is the AI-powered professional services platform helping companies manage delivery, resources, and financial performance. 2,700+ customers worldwide $4B+ billable time tracked annually Inc. 500 Fastest Growing Companies (4 years in a row) Best Places to Work (3 years running) We’re headquartered in Chicago, with a strong engineering hub in Wrocław. What You’ll Do Team Leadership Lead, mentor and grow a team of engineers Support hiring, development and performance conversations Foster a culture of ownership, collaboration and continuous improvement Technical Leadership Drive architecture and delivery for AI-powered systems Guide engineering best practices across scalable distributed services Partner closely with Product and Engineering leaders AI & Platform Development Build AI and agentic workflows using LLMs, MCP and A2A Design scalable, secure and observable AI services Explore new AI technologies and bring ideas into production Tech Stack Python • React • MongoDB • Redis • AWS/Azure • LLMs • MCP • A2A What We’re Looking For 5+ years of software engineering experience Previous experience leading or mentoring engineers Strong experience with distributed systems and SaaS applications Hands-on experience with modern backend technologies and cloud platforms Experience with AI/LLM systems or strong interest in agentic AI Strong communication and collaboration skills Ability to balance people leadership with technical ownership What We Offer Flexible work model (office or hybrid) Contract of employment or B2B Private healthcare Cafeteria system & Multisport Modern office in the center of Wrocław Business trips to the USA Open and collaborative culture Team events and integration trips Ready to help shape the future of AI-powered software? Apply now.

🏢 Summary: Opportunity for a Team Lead Software Engineer to lead and grow a team delivering AI-powered, distributed SaaS systems. The role combines people leadership with hands-on technical ownership, driving architecture and delivery of scalable AI and agentic solutions. You will mentor engineers while building and productionizing next-generation AI services. 🗂️ Requirements: 5+ years software engineering experience, Experience leading or mentoring engineers, Strong experience with distributed systems, Experience building SaaS applications, Hands-on experience with backend technologies, Experience with cloud platforms, Experience with AI or LLM systems 📃 Skills: Python, React, MongoDB, Redis, AWS, Azure, LLM, MCP, A2A, SaaS, DistributedSystems 🏢 Description: Team Lead- Software Engineer BigTime is looking for an experienced Team Lead- Software Engineer to lead and grow a team building the future of AI-powered software. This role combines people leadership, technical ownership and AI innovation . You’ll mentor engineers, drive delivery and help shape next-generation AI solutions used by thousands of professional services companies worldwide. About BigTime BigTime is the AI-powered professional services platform helping companies manage delivery, resources, and financial performance. 2,700+ customers worldwide $4B+ billable time tracked annually Inc. 500 Fastest Growing Companies (4 years in a row) Best Places to Work (3 years running) We’re headquartered in Chicago, with a strong engineering hub in Wrocław. What You’ll Do Team Leadership Lead, mentor and grow a team of engineers Support hiring, development and performance conversations Foster a culture of ownership, collaboration and continuous improvement Technical Leadership Drive architecture and delivery for AI-powered systems Guide engineering best practices across scalable distributed services Partner closely with Product and Engineering leaders AI & Platform Development Build AI and agentic workflows using LLMs, MCP and A2A Design scalable, secure and observable AI services Explore new AI technologies and bring ideas into production Tech Stack Python • React • MongoDB • Redis • AWS/Azure • LLMs • MCP • A2A What We’re Looking For 5+ years of software engineering experience Previous experience leading or mentoring engineers Strong experience with distributed systems and SaaS applications Hands-on experience with modern backend technologies and cloud platforms Experience with AI/LLM systems or strong interest in agentic AI Strong communication and collaboration skills Ability to balance people leadership with technical ownership What We Offer Flexible work model (office or hybrid) Contract of employment or B2B Private healthcare Cafeteria system & Multisport Modern office in the center of Wrocław Business trips to the USA Open and collaborative culture Team events and integration trips Ready to help shape the future of AI-powered software? Apply now.

🏢 Summary: Senior Python Developer role focused on building and scaling the back-end of an AI-driven quantitative investment platform using FastAPI and AWS. The position involves developing secure, high-performance RESTful services and contributing to a full-stack AI-native feature team. The goal is to deliver a robust, scalable system supporting intelligent and transparent investment solutions. 🗂️ Requirements: Bachelor’s degree in Computer Science, Engineering or related field or equivalent experience, 3+ years of back-end development experience, Proven experience with Python, Commercial experience with FastAPI, Experience building RESTful APIs, Strong knowledge of server-side architecture, Experience with database management, Hands-on experience with AWS, Knowledge of security and data protection practices, Experience with Git 📃 Skills: Python, FastAPI, AWS, REST, API, Git, SQL, GenAI 🏢 Description: We are looking for a dynamic, hands-on Senior Python Developer to join a full-stack AI native feature team for building a cutting-edge quantitative investment platform. The project aims to deliver a groundbreaking, AI-driven investment ecosystem that revolutionizes the entire investment process through an intuitive and human-centric design approach. This initiative transcends mere digitization, aiming to redefine investment decision-making with systematic, transparent and intelligent solutions. The platform is designed with the versatility to cater to a wide array of users and offers transformative capabilities for the investment landscape. Responsibilities Design, develop, and maintain robust and scalable back-end systems using FastAPI and Python Implement security and data protection measures to ensure the integrity and confidentiality of data Optimize applications for maximum speed and scalability Develop and maintain RESTful APIs for seamless communication between different components of the application Conduct code reviews and provide mentorship to ensure code quality and adherence to best practices Troubleshoot and resolve complex technical issues and bugs in a timely manner Stay up-to-date with the latest industry trends and technologies to continuously improve development processes and system performance Requirements Bachelor's degree in Computer Science, Engineering, or a related field, or equivalent practical experience 3+ years of proven experience as a Back-End Developer with a focus on FastAPI and Python Strong understanding of server-side logic and database management Expertise in Amazon Web Services Knowledge of FastAPI and REST API Background in Gen AI Assisted Development Familiarity with version control systems such as Git Excellent problem-solving skills and attention to detail Strong communication and collaboration skills Ability to work independently and as part of a team in a fast-paced environment B1+ English level proficiency Nice to have Skills in Cursor Proficiency in ReactJS We offer/Benefits 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.

🏢 Summary: Senior Python Developer role in a startup-like environment focused on designing and delivering high-performance, scalable systems for demanding clients. The position involves full ownership of features from architecture to deployment, solving complex engineering problems, and shaping technical direction. It requires working under pressure with rapidly changing priorities while ensuring code quality and system reliability. 🗂️ Requirements: 5+ years commercial software development experience, Strong professional experience with Python, Excellent knowledge of Python 3.11+, Production experience with FastAPI or Falcon and Async SQLAlchemy 2.0, Strong expertise in REST and GraphQL API design, Solid understanding of relational and non-relational databases, Advanced knowledge of OOP, SOLID, YAGNI, TDD, Extensive experience with pytest, CI/CD pipelines, Docker, deployments, Experience building scalable, low-latency systems, Very good written and spoken English 📃 Skills: Python, FastAPI, Falcon, SQLAlchemy, REST, GraphQL, PostgreSQL, MongoDB, Redis, Elasticsearch, pytest, Docker, CI/CD, AWS, Azure, OOP, SOLID, TDD 🏢 Description: Startup Environment, High Ownership, Demanding Clients Join our startup-like environment filled with new ideas, rapid change, and a strong focus on priorities and delivery. We are looking for a Senior Python Developer - someone experienced, open-minded, and ready to take real ownership of both product and technical direction. You will work closely with demanding clients , solve complex engineering problems, and help shape ambitious, high-performance systems. This role is for engineers who enjoy responsibility, fast feedback loops, architectural challenges, and working under pressure . Your primary responsibilities beyond the will to change the world: Act as a technical partner for clients : analyze business needs, challenge requirements, and propose effective, scalable solutions Take full ownership of complex features - from concept and architecture through implementation, testing, and automated deployment Design system architecture, APIs, and data models for high-load, data-intensive systems Deliver core and business-critical components of projects Work in a dynamic, startup-style environment with changing priorities, tight deadlines, and real product pressure Proactively identify risks, bottlenecks, and technical debt , and drive improvements Ensure high code quality, performance, and reliability Support and mentor other developers, helping raise engineering standards across teams Must have: 5+ years of commercial software development experience, including strong professional experience in Python Excellent knowledge of Python 3.11+ (typing, dataclasses, modern best practices) Production experience with modern Python frameworks ( async FastAPI preferred, Falcon welcome, Async SQLAlchemy 2.0 ) Strong expertise in API design (REST, GraphQL) Solid understanding of databases and data-driven systems (relational, document, search, key-value stores) Advanced knowledge of software engineering principles (OOP, SOLID, YAGNI, TDD) Extensive experience with unit testing (pytest), CI/CD pipelines, Docker, and deployments Proven ability to build efficient, low-latency, scalable systems Confidence working with tight deadlines, pressure, and frequently evolving requirements Very good written and spoken English Strong communication skills and a proactive, ownership-oriented mindset Experience we'd appreciate, too: Experience in system architecture and technical leadership Asynchronous programming and high-concurrency systems Messaging systems and distributed architectures DDD and event-driven design Cloud and DevOps experience ( AWS / Azure ) Mentoring and influencing technical direction of projects Nice to have: Community involvement (meetups, open source, speaking) Writing technical articles or internal knowledge-sharing A list of benefits is long so we will mention only about the crucial ones: Challenging projects with real business impact Work in a startup-like environment : fast decisions, autonomy, responsibility 100% remote or office in Poland (Wrocław / Zielona Góra) Sport subscription Private healthcare

🏢 Summary: Opportunity for a Senior Python Developer to build advanced risk management platforms for global financial institutions within demanding trading environments. The role focuses on developing scalable backend systems, contributing to cloud-based architectures, and collaborating with international clients and senior engineers. It offers high technical ownership, exposure to quantitative finance, and work across multiple modern technologies. 🗂️ Requirements: Strong commercial experience in Python backend development, Degree in Computer Science, Mathematics, Physics, or related field, Solid understanding of software architecture, algorithms, and data structures, Experience with cloud platforms (AWS, Azure, or GCP), Ability to work across multiple programming languages and tech stacks, Confident English communication skills, Willingness to work in hybrid model (4 days in Warsaw office) 📃 Skills: Python, Go, Rust, C++, TypeScript, AWS, Azure, GCP, Algorithms, DataStructures, Cloud 🏢 Description: 💎 Senior Python Developer 💎 A rare opportunity has arisen for an ambitious, highly technical Senior Python Developer to join an elite engineering team building advanced risk management solutions for global financial institutions. In this role, you will work on complex backend systems used within highly demanding financial and commodities trading environments, collaborating closely with top-tier engineers and international clients. You will contribute to the development of scalable risk platforms while working across modern cloud infrastructure and multiple programming languages. If you enjoy solving difficult engineering problems, working alongside exceptionally strong developers, and building software with real business impact… Feel invited! This role offers a unique combination of technical depth, ownership, and exposure to the world of quantitative finance. WHAT WE OFFER B2B contract Competitive salary + biannual bonus Flexible working hours Hybrid work - 4 days from the office located in Warsaw Work closely with experienced engineers from top financial and technology companies International projects and collaboration with global clients Opportunity to grow within a highly technical, developer-driven culture YOUR ROLE Develop and maintain backend systems primarily in Python Build and extend risk management software for financial institutions Design scalable and maintainable solutions for complex business requirements Collaborate directly with international clients and technical stakeholders Work across multiple technologies including Python, Go, Rust, C++, and TypeScript Contribute to cloud-based solutions running on AWS and Azure Participate in architectural discussions and technical problem solving Continuously improve platform reliability, performance, and scalability IF YOU ARE A PERSON WHO Has strong commercial experience with Python backend development Holds a degree in Computer Science, Mathematics, Physics, or a related field Has solid understanding of software architecture, algorithms, and data structures Feels comfortable working across multiple programming languages and tech stacks Communicates confidently in English and enjoys working directly with clients Has experience with cloud platforms such as AWS, Azure, or GCP Understands financial systems or has previous exposure to financial markets (nice to have) Thrives in highly collaborative, engineering-driven environments Enjoys solving complex technical challenges together with the team in the office Congrats! This offer is especially for YOU!

🏢 Summary: Part-time Senior Python Developer role focused on taking technical ownership of a web ecosystem for parenting and childcare products. The position involves developing and maintaining Django/Wagtail-based platforms with React and Next.js frontends, ensuring stability, new feature delivery, and CRM integrations. The role combines backend development, infrastructure work on AWS, and ongoing system evolution. 🗂️ Requirements: Extensive experience with Python, Strong experience with Django, Wagtail, and Celery, Good knowledge of PostgreSQL, Hands-on experience with AWS (Fargate and ECS required), Ability to manage and enhance complex Django/Wagtail systems, Experience with React and Next.js frontends, Experience with CRM integrations using Django, Fluency in Polish and English 📃 Skills: Python, Django, Wagtail, Celery, PostgreSQL, AWS, Fargate, ECS, Lambda, Cognito, Terraform, React, Next.js, CRM 🏢 Description: Job description We are looking for a Senior Python Developer to join our team on a part-time basis (0.5 FTE). We are open to both in-house candidates looking for a stable team environment and freelance developers seeking a flexible long-term collaboration. In this role, you will take technical ownership of a web ecosystem dedicated to products for parents and children, balancing new feature development with platform stability. What We’re Looking For Technical Core: Extensive experience with Python , specifically Django, Wagtail, and Celery. Data & Infrastructure: Good knowledge of PostgreSQL and hands-on experience with AWS (Fargate and ECS are essential; Lambda and Cognito are a plus). DevOps Mindset: Familiarity with Terraform is a strong advantage. Ownership: Ability to manage and enhance complex systems (Wagtail CMS / Django wrappers). Communication: Fluency in both Polish and English is required for effective team and client collaboration. What You'll Do Product Development: Work closely with the client and the team to build and maintain web applications for the parenting and childcare sector. System Evolution: Manage and enhance three websites built on Wagtail with React & Next.js frontends. Full Lifecycle Engineering: Handle new feature development, ongoing maintenance, and bug fixes to ensure maximum platform stability. Marketing Support: Develop and optimize services tailored for the marketing department. Integrations: Ensure seamless communication with the client's CRM through a dedicated Django-based wrapper.

🏢 Summary: Senior Python Engineer role focused on building production-grade data pipelines and AI-driven systems, including LLM-based applications. The position involves designing scalable architectures, processing large datasets, and integrating modern cloud data platforms. You will work on complex, real-world data solutions used in production environments. 🗂️ Requirements: Senior-level Python experience, Strong knowledge of SQL and data processing, Experience building and maintaining data pipelines, Hands-on experience with orchestration tools (Airflow, Prefect, or Dagster), Experience with cloud data platforms (S3, BigQuery, Snowflake, or Databricks), Experience integrating LLM frameworks (LangChain or LlamaIndex), Ability to design scalable, production-ready systems 📃 Skills: Python, Pandas, NumPy, PySpark, SQL, Airflow, Prefect, Dagster, S3, BigQuery, Snowflake, Databricks, LangChain, LlamaIndex, LLM 🏢 Description: Our client is a technology consultancy that builds advanced data and AI systems for startups and enterprise companies. Their focus is on delivering production-ready solutions, especially in areas like data platforms, large-scale processing, and LLM-based applications. The Role As a Senior Python Engineer, you’ll be working on complex, data-heavy systems that go beyond prototypes. This includes designing and developing data pipelines, handling large-scale datasets, and integrating modern AI solutions (including LLMs) into real-world products. You’ll collaborate closely with experienced engineers and take part in architectural decisions, helping turn ideas into scalable, reliable systems used in production. What we’re looking for We’re looking for a strong senior-level engineer with deep experience in Python (including libraries like Pandas, NumPy, and PySpark), as well as solid knowledge of SQL and data processing. You should be comfortable working with data pipeline orchestration tools such as Airflow, Prefect, or Dagster, and have hands-on experience with modern cloud data platforms (e.g. S3, BigQuery, Snowflake, or Databricks). Experience with LLM frameworks like LangChain or LlamaIndex, especially in the context of data integration, is an important part of this role. Why join This is a great opportunity to work on real AI and data systems at scale, in a consultancy environment where engineering quality matters and you have a genuine impact on technical decisions. You’ll join a senior, low-ego team, work fully remotely from Poland, and contribute to projects for international clients.