freelance data science engineer python sql

Meet the Team We’re a team in Developer Observability, focused on giving engineers the tools and insights they need to ship faster and smarter. Our work supports teams across the organization by improving decision-making and development workflows. We operate as a distributed team across the US and Poland. Your Impact We are looking for an experienced...

Fetcherr builds responsible AI that transforms market complexity into measurable profit growth. At the core of the company is the Market Model - a proprietary AI-powered model delivering accurate, granular demand predictions with 96% forecast accuracy and real-time decision intelligence for commercial teams. Built on a glass-box architecture, it uses...

As a recruitment company, DCG understands that every business is powered by experienced professionals. Our management style and partnership approach enable us to meet your needs and provide continuous support. Due to our ongoing growth and the large number of recruitment projects we undertake for our partners, we are currently looking...

As a recruitment company, DCG understands that every business is powered by experienced professionals. Our management style and partnership approach enable us to meet your needs and provide continuous support. Due to our ongoing growth and the large number of recruitment projects we undertake for our partners, we are currently looking...

Who we are Moniepoint is a global fintech building modern financial services for millions of people and businesses across high-growth markets. We provide payments, banking, credit, and financial management tools - reliable products that people and businesses use every day to run their lives, grow their companies, and move money safely. Our mission is simple:...

IndustrybankingLocationhybrid - 3 days per week from office in Warsaw or GdańskRate165 pln/h on b2bSummaryWe're looking for a Senior Data professional with strong SQL and Python skills to design data models, define data mappings, and translate business requirements into scalable technical solutions in a banking environment.Main ResponsibilitiesDesign and...

Senior Python / AI Data Engineer About the Client Our client is a leading global investment management company headquartered in London, managing $228+ billion in assets for institutional investors, pension funds, wealth managers, and other sophisticated clients worldwide. The company specializes in quantitative investing, alternative investments, systematic...

Working with UsChallenging. Meaningful. Life-changing. Those aren’t words that are usually associated with a job. But working at Bristol Myers Squibb is anything but usual. Here, uniquely interesting work happens every day, in every department. From optimizing a production line to the latest breakthroughs in cell therapy, this is work that transforms the...

Ambition Needs a Place to Grow. At Playtika, we create mobile games enjoyed by millions worldwide. Combining the scale of a public company (NASDAQ: PLTK) with the speed and ownership of a startup, we are a global leader where innovation, data, and creativity shape the future of entertainment. Here, your ideas matter, your decisions impact products, and your...

Working with Us Challenging. Meaningful. Life-changing. Those aren’t words that are usually associated with a job. But working at Bristol Myers Squibb is anything but usual. Here, uniquely interesting work happens every day, in every department. From optimizing a production line to the latest breakthroughs in cell therapy, this is work that transforms the...

Data Science ManagerDate: Jul 7, 2026City : Warsaw State : Mazowieckie (PL-MZ) Country : Poland (PL) Requisition Number: 44367Overview:We are seeking a highly motivated and experienced Data Science Manager, with strong expertise in commercial analytics and to join our growing team. As Data Science Manager, you will be responsible for leading a team of data...

Responsibilities As a Data Science Engineer, you will develop data-driven solutions on AWS — combining data analysis, feature engineering, statistical thinking, and hands-on data engineering. You will work closely with business, engineering, and platform teams to turn data into actionable insights and scalable analytical workflows. Responsibilities:...

XTB online investing is seeking a Data Engineer to join the Core Data Platform team. You will design, build and scale data pipelines, ensure data quality, and drive integration across multiple source systems using Python, SQL and Spark.You will contribute to architecture, standards, and IaC, collaborating across teams while enabling reliable, real-time data...

Arini Capital Management is a specialized alternative asset manager with a diverse credit investment offering across public and private credit, supported by a highly sophisticated global institutional investor base. Founded in 2021 with a primary focus on European credit markets and an approach rooted in fundamental credit analysis, Arini manages capital...

Working with UsChallenging. Meaningful. Life-changing. Those aren’t words that are usually associated with a job. But working at Bristol Myers Squibb is anything but usual. Here, uniquely interesting work happens every day, in every department. From optimizing a production line to the latest breakthroughs in cell therapy, this is work that transforms the...

**Powering the agentic revolution in travel.** Sabre is an AI-native technology leader, backed by one of the world’s largest travel data clouds. Built on an open, modular, cloud-native architecture, Sabre serves as the backbone for both established leaders and bold, new disruptors, guiding them to the next age of travel retailing through intelligent,...

Sii Polska is seeking a skilled Data Engineer to join our team in Warsaw, with on-site presence at the client’s office and monthly visits. You will migrate and modernize data and analytics processes, working with analytics and data engineering teams to deliver scalable solutions.Ideal candidates have 4+ years in data processing, strong SQL with BigQuery,...

ResponsibilitiesDesigning and building a stable, scalable, near real‑time and reliable BMC Helix data replication solutionBuild, design and maintain data architecture ensuring complete collection and quality of data while adhering to best data practicesDesign, build, test and maintain data pipelinesTroubleshooting and innovatingWorking within SAFe Scrum...

Sopra Steria Polska is seeking a Senior Data Engineer to join our team for a client in the automotive sector. You will work in a multinational environment (Germany, Poland) on data engineering and infrastructure tasks in Katowice or Gdańsk offices.The role requires 5+ years in data engineering, strong Python and SQL, and hands-on experience with AWS...

Pricing Data Science Developer Wrocław, Poland Responsibilities Contribute to the exploration of possibilities and methods of utilizing artificial intelligence and business intelligence to improve data and reporting. Help to guide the design and contribute to the development of PowerBI/RShiny/Streamlit Business Intelligence dashboards for Pricing &...