Data Analyst

🏢 Summary: The offer is for a remote Data Analyst role within Study Patient Operations, focused on transforming diverse clinical study data into standardized, analysis-ready datasets. The position involves cross-study data harmonization, pattern and anomaly detection, data quality improvement, and building reproducible data pipelines in a regulated environment. The role requires close collaboration with stakeholders to translate ambiguous business questions into structured analytical solutions using modern data tools. 🗂️ Requirements: Proficiency in Python and SQL for data analysis and reproducible workflows, Experience with AWS environments, especially S3 and analytical/query tools, Experience in data standardization and harmonization across heterogeneous datasets, Ability to perform data wrangling, transformation, and validation, Experience in pattern and anomaly detection across multiple datasets, Knowledge of GDPR-compliant data handling and documentation practices, Ability to translate ambiguous business requirements into structured data solutions, Data visualization skills using BI tools, Fluent English (spoken and written) 📃 Skills: Python, SQL, AWS, S3, PowerBI, GDPR, CDISC, SDTM, ADaM, SAS 🏢 Description: Data Analyst within Study Patient Operations About the project We are looking for a Data Analyst in collaboration with a global, science‑driven biopharmaceutical company that uses data and advanced analytics to accelerate the development of innovative therapies. As a Data Analyst in Study Patient Operations, you will transform diverse clinical study data into reliable, analysis‑ready datasets and support cross‑study standardisation and reusability. This role is ideal for someone who thrives in ambiguity, shows strong analytical curiosity, and proactively proposes structured solutions even with incomplete information. Work mode: 100% remote (with one day per month on-site at the client’s office in Warsaw) Tasks Cross‑study data standardisation: Standardise and harmonise data from multiple studies with varying conventions to enable consistent cross‑study analysis. Pattern and anomaly detection: Identify patterns, discrepancies, anomalies, and structural differences across datasets and convert them into actionable mapping rules and validation checks. FAIR data improvement: Strengthen metadata, lineage, definitions, and data quality to enhance data accessibility and reusability, even when documentation is incomplete. Problem framing & stakeholder collaboration: Translate broad or ambiguous business questions into clear data requirements, analytical approaches, and defined pipeline outputs. Data wrangling & transformation: Extract, join, transform, and reconcile datasets using Python, SQL, and AWS‑based tools to support downstream analysis. Compliance, documentation & insight communication: Ensure GDPR‑aligned data handling, maintain audit‑ready documentation, and clearly communicate insights, limitations, and assumptions. Expectations Strong analytical problem‑solving skills in ambiguous contexts and ability to iterate toward clarity. Learning agility , with motivation to quickly understand new domains and clinical data standards. Standardisation mindset , with experience proposing consistent mappings across heterogeneous datasets. Pattern recognition ability across multiple datasets/studies. Proficiency in Python and SQL for analysis, validation, and reproducible workflows. Experience with AWS environments , especially S3 and analytical/querying tools. Data visualisation skills (Power BI or similar). Excellent communication and documentation abilities , especially explaining “what the data means.” Fluent in English (spoken and written) Beneficial Skills Familiarity with clinical trial standards (e.g., CDISC SDTM, ADaM ). Experience with SAS-formatted clinical datasets . Understanding of clinical study processes , privacy/consent principles, and patient data handling. Exposure to machine learning / AI / agentic tools . Interest or experience in LLM-based tooling , especially for metadata, documentation, or analytics workflows. 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. About 7N Constantly searching for projects, difficult rate negotiations, lack of development support – sounds familiar? At 7N, you gain not only stability of contracts but also the personal involvement of a dedicated agent who ensures your professional comfort and continuous access to development initiatives. Our mission is to provide stable and rewarding collaborations that drive your success as an IT expert and the success of our clients. We build long-lasting relationships based on Scandinavian values and 30 years of experience creating IT solutions for over 200 organizations.

🏢 Summary: Long-term role in a global medical diagnostics project focused on building and scaling a Java-based test automation framework for a cloud-ready digital platform. The position involves developing UI test automation, integrating tools, and supporting CI/CD within a Scaled Agile environment. You will collaborate with cross-functional teams to enhance automation capabilities across multiple product teams. 🗂️ Requirements: Minimum 5 years of experience in test automation, Strong expertise in Java and OOP, Experience building test automation frameworks from scratch, Hands-on experience with Playwright or Selenium, Experience with TestNG or JUnit, Knowledge of SOLID, DRY, KISS principles, Understanding of design patterns (Decorator, Factory, Facade, Strategy, Builder), Experience with Maven and multi-module projects, Experience with surefire, failsafe, compile plugins, Experience integrating xRay, Allure, Sonar, PMD, Knowledge of GitHub and GitHub Actions, Experience in CI/CD automation, Experience in SAFe or Scaled Agile environments, Experience with refactoring and static code analysis 📃 Skills: Java, OOP, Playwright, Selenium, TestNG, JUnit, Maven, xRay, Allure, Sonar, PMD, GitHub, GitHubActions, CI/CD, SAFe, SOLID, DRY, KISS, Lombok, POJO 🏢 Description: About project: You will join a long-term, strategic initiative developing an advanced digital platform supporting clinical workflows in the area of medical diagnostics. The solution is built in a modern ecosystem and used globally by healthcare professionals. The environment is highly scalable, cloud‑ready, and developed in an international, cross‑functional setup. The team is currently expanding its test automation capabilities and implementing a large-scale automation framework supporting multiple product teams across several locations. Job Responsibilities Collaboration with cross-functional teams (BE, FE, QA, PO, SM) to design, implement, and scale test automation solutions,Development and enhancement of the Java-based test automation framework , Creating and maintaining UI automated tests using Playwright (and Selenium where applicable), Working within 2-week sprints in a Scaled Agile setup,Ensuring code quality through refactoring , use of design patterns , and static analysis tools,Integrating the automation framework with xRay, Allure, Jira , Developing CI/CD automation using GitHub Actions ,Supporting the shift-left testing approach across the organization. Expectations At least 5 years of experience in test automation , Strong expertise in Java , deep knowledge of OOP , and experience building test automation frameworks from scratch , Hands-on experience with Playwright (or Selenium ) and test frameworks such as TestNG or JUnit , Practical understanding of SOLID , DRY , KISS , encapsulation , and common design patterns (including Decorators , Factories , Facades , Strategy , Builder ), Experience with Maven , especially multi‑module projects and plugins such as surefire , failsafe , and compile , Experience integrating tools such as xRay , Allure , Sonar , PMD , Good knowledge of GitHub and GitHub Actions ,Familiarity with Lombok , POJO definitions , and refactoring best practices , Experience working in SAFe / Scaled Agile environments, Strong communication skills and ability to collaborate effectively in distributed teams, Nice to have: experience with Python for basic performance testing and familiarity with AI agents / GitHub Copilot . 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. About 7N Constantly searching for projects, difficult rate negotiations, lack of development support – sound familiar? At 7N, you gain not only stability of contracts but also the personal involvement of a dedicated agent who ensures your professional comfort and continuous access to development initiatives. Our goal is to provide you with stable and comfortable cooperation, contributing to your success as an IT expert and the success of our clients. We build long-lasting relationships based on Scandinavian values and 30 years of experience in creating IT solutions for over 200 organizations.

🏢 Summary: The offer is for a Software Developer in Test to design and implement automated testing frameworks for a scalable financial platform, ensuring high quality across distributed microservices systems. The role focuses on backend and frontend test automation, performance and security testing, and close collaboration within agile teams. It combines hands-on coding in Java with shaping quality engineering practices in a cloud-based environment. 🗂️ Requirements: Strong proficiency in Java, Experience with backend test automation frameworks, Experience with frontend test automation frameworks, Experience integrating tests into CI/CD pipelines, Knowledge of performance testing methodologies and tools, Knowledge of automated security testing methodologies and tools, Familiarity with cloud environments, Familiarity with configuration management, Knowledge of BDD practices, Experience testing distributed microservices-based systems, Experience working in agile teams 📃 Skills: Java, Selenium, Cypress, JUnit, TestNG, Cucumber, BDD, CI/CD, Jenkins, Git, Docker, Kubernetes, AWS, Azure, GCP, Microservices 🏢 Description: We are looking for Software Developer in Test who will join our client that creates platform which enables businesses to seamlessly offer financial solutions to their customers in a secure and scalable way. Its end-to-end approach ensures full support across the entire journey, including compliance management and resilient customer support services. Operating mode: Hybrid, 2 x month Warsaw Office Job Responsibilities ·       Be part of customer-centric agile teams, working closely with product managers, designers, and engineers ·       Collaborate across teams to continuously refine and enhance testing approaches for both new and existing products ·       Write clean, maintainable, and reusable code that supports long-term scalability ·       Design and implement robust automated testing frameworks that enable fast and reliable delivery of value to customers ·       Support fellow engineers in testing their solutions and serve as a go-to expert in quality engineering ·       Partner with stakeholders across the organization to influence the future direction of quality practices and keep customer needs at the core of key decisions ·       Help drive the development of our testing discipline, ensuring high standards in both technology and processes Requirements: ·       Strong proficiency in Java with solid coding abilities ·       Practical experience using both backend and frontend test automation frameworks , including integrating them into CI/CD pipelines ·       Understanding of performance testing and automated security testing methodologies and tools ·       Familiarity with cloud environments and configuration management ·       Good knowledge of Behaviour-Driven Development ( BDD ) practices ·       Experience working in agile teams, testing and delivering distributed microservices-based systems 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

🏢 Summary: Senior Data Analyst role focused on designing and delivering advanced Power BI solutions, transforming complex data into actionable insights, and supporting strategic decision-making across global business functions. The position involves advanced analytics, data modeling, automation, and contribution to a large-scale data platform modernization initiative. Hybrid work model based in Poznań. 🗂️ Requirements: 5+ years of experience in Business Analytics or Business Intelligence, Strong hands-on experience with Power BI, Advanced SQL skills, Strong knowledge of DAX and data modeling, Experience with cloud platforms (GCP or Azure), Experience with Databricks, Experience with Git, Ability to perform advanced analytics (segmentation, cohort analysis, marketing analytics) 📃 Skills: PowerBI, SQL, BigQuery, DAX, Python, GCP, Azure, Databricks, Git, QlikView 🏢 Description: Contract of Employment - only Hybrid work from Poznań We are looking for a Senior Data Analyst to join a dynamic global Data Analytics team and collaborate with key stakeholders across CRM, Retail, Brand, e-commerce, Finance, and Supply Chain. The role is based in Poznań, Poland, with a functional reporting line to the company’s global headquarters. In this position, you will transform complex data into actionable insights that support strategic decision-making and drive measurable business impact. You will also play an important role in fostering a data-driven culture and contribute to a strategic initiative focused on modernizing the organization’s data platform to ensure scalability and future readiness. Key Responsibilities Design and develop Power BI solutions, including datasets, star-schema models, DAX measures, and dashboards Deliver high-quality ad-hoc analyses and translate business needs into clear insights and recommendations Collaborate with global stakeholders, align on KPIs and definitions, and present findings to senior leadership Improve data quality, enhance transformation layers, and ensure consistency across reporting Automate recurring analyses and optimize processes for efficiency Perform advanced analytics such as segmentation, cohort analysis, and marketing effectiveness Enable self-service analytics by empowering business teams to leverage data independently Promote a data-driven mindset across the organization Contribute to a global data transformation initiative and the evolution of the analytics ecosystem Experience: 5+ years of experience in Business Analytics or Business Intelligence Strong hands-on experience with Power BI Technical Skills: Advanced SQL (BigQuery is a plus) Strong knowledge of DAX and data modeling Python for advanced analytics (preferred) Experience with cloud platforms (GCP or Azure), Databricks, and Git Familiarity with QlikView is a plus Analytical Expertise: Power BI development and dashboard design Data modeling (star schema, semantic layer optimization) Advanced analytics (segmentation, cohort analysis, marketing analytics) Process automation and optimization Soft Skills: Excellent data storytelling and communication skills Strong stakeholder management in a global environment Ability to prioritize and align business needs and KPIs Passion for promoting data-driven decision-making Experience supporting organizational change and adoption of new tools Strong presentation skills with the ability to influence decision-makers What you need to do now If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us now. Hays Poland sp. z o.o. is an employment agency registered in a registry kept by Marshal of the Mazowieckie Voivodeship under the number 361.

🏢 Summary: Senior Data Analyst role focused on designing and delivering advanced Power BI solutions, transforming complex data into actionable insights, and supporting global stakeholders in strategic decision-making. The position involves modernizing the data platform, improving data quality, and enabling self-service analytics within a global data transformation initiative. 🗂️ Requirements: 5+ years of experience in Business Analytics or Business Intelligence, Strong hands-on experience with Power BI, Advanced SQL skills, Strong knowledge of DAX and data modeling, Experience with cloud platforms (GCP or Azure), Experience with Databricks, Experience with Git, Ability to perform advanced analytics (segmentation, cohort analysis, marketing analytics) 📃 Skills: PowerBI, SQL, BigQuery, DAX, Python, GCP, Azure, Databricks, Git, QlikView 🏢 Description: Contract of Employment - only Hybrid work from Poznań We are looking for a Senior Data Analyst to join a dynamic global Data Analytics team and collaborate with key stakeholders across CRM, Retail, Brand, e-commerce, Finance, and Supply Chain. The role is based in Poznań, Poland, with a functional reporting line to the company’s global headquarters. In this position, you will transform complex data into actionable insights that support strategic decision-making and drive measurable business impact. You will also play an important role in fostering a data-driven culture and contribute to a strategic initiative focused on modernizing the organization’s data platform to ensure scalability and future readiness. Key Responsibilities Design and develop Power BI solutions, including datasets, star-schema models, DAX measures, and dashboards Deliver high-quality ad-hoc analyses and translate business needs into clear insights and recommendations Collaborate with global stakeholders, align on KPIs and definitions, and present findings to senior leadership Improve data quality, enhance transformation layers, and ensure consistency across reporting Automate recurring analyses and optimize processes for efficiency Perform advanced analytics such as segmentation, cohort analysis, and marketing effectiveness Enable self-service analytics by empowering business teams to leverage data independently Promote a data-driven mindset across the organization Contribute to a global data transformation initiative and the evolution of the analytics ecosystem Experience: 5+ years of experience in Business Analytics or Business Intelligence Strong hands-on experience with Power BI Technical Skills: Advanced SQL (BigQuery is a plus) Strong knowledge of DAX and data modeling Python for advanced analytics (preferred) Experience with cloud platforms (GCP or Azure), Databricks, and Git Familiarity with QlikView is a plus Analytical Expertise: Power BI development and dashboard design Data modeling (star schema, semantic layer optimization) Advanced analytics (segmentation, cohort analysis, marketing analytics) Process automation and optimization Soft Skills: Excellent data storytelling and communication skills Strong stakeholder management in a global environment Ability to prioritize and align business needs and KPIs Passion for promoting data-driven decision-making Experience supporting organizational change and adoption of new tools Strong presentation skills with the ability to influence decision-makers What you need to do now If you're interested in this role, click 'apply now' to forward an up-to-date copy of your CV, or call us now. Hays Poland sp. z o.o. is an employment agency registered in a registry kept by Marshal of the Mazowieckie Voivodeship under the number 361.

🏢 Summary: Role for an experienced Python Developer to design and maintain scalable systems and data pipelines for digital health solutions. The position involves building prototypes and MVPs, contributing to system architecture, and improving performance and reliability of applications. It requires strong expertise in scalable software development and hands-on data pipeline implementation. 🗂️ Requirements: 5+ years of experience with Python, Hands-on experience building data pipelines, Strong knowledge of software architecture, Experience with scalable systems development, Ability to design and maintain high-quality codebases 📃 Skills: Python, AWS, Azure, CI/CD, SQL, Elasticsearch, OpenSearch, Neptune, Neo4j 🏢 Description: Python Developer with data pipeline About the project We are seeking a Python Developer with data pipeline for a global life‑science company driving innovation in digital health . You will build and maintain scalable applications, working closely with cross‑functional teams and contributing to new features and MVPs. Success in this role requires strong system architecture skills, hands‑on experience with scalable software, and a passion for experimentation and rapid prototyping. Tasks Develop and maintain scalable systems and data pipelines Build prototypes and MVPs to test new ideas Contribute to system architecture and high‑quality coding practices Improve performance, reliability, and maintainability of solutions Expectations 5+ years of experience with Python Hands-on experience building data pipelines Strong understanding of software architecture and scalable development Clear and effective communication skills Advanced English proficiency (C1 level) Nice to have Experience with AWS services Azure DevOps CI/CD pipelines Relational databases Elasticsearch/OpenSearch Graph databases (e.g., Neptune, Neo4j) 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. About 7N Constantly searching for projects, difficult rate negotiations, lack of development support – sounds familiar? At 7N, you gain not only stability of contracts but also the personal involvement of a dedicated agent who ensures your professional comfort and continuous access to development initiatives. Our mission is to provide stable and rewarding collaborations that drive your success as an IT expert and the success of our clients. We build long-lasting relationships based on Scandinavian values and 30 years of experience creating IT solutions for over 200 organizations.

🏢 Summary: Remote Backend Python Developer role for a long-term pharmaceutical project focused on building secure, scalable, and high-quality backend services and REST APIs in a regulated environment. The position emphasizes clean, testable code, robust API design, and close collaboration with DevOps to ensure performance and reliability. Strong experience with modern Python ecosystem and cloud infrastructure is required. 🗂️ Requirements: Strong experience with Python 3.12+, Experience designing and implementing REST APIs, Hands-on experience with FastAPI and Pydantic, Practical knowledge of JWT authentication mechanisms, Experience with asynchronous programming, Ability to write typed Python code using typing, Experience with SQLAlchemy 2.0, Ability to write efficient SQL queries, Experience creating and maintaining unit tests, Knowledge of Dependency Injection principles, Experience with OpenAPI/Swagger documentation, Basic experience with Docker image creation, Ability to read and modify GitLab CI/CD pipelines, Practical experience with AWS services (EKS, ECR, Load Balancing) 📃 Skills: Python, FastAPI, Pydantic, SQLAlchemy, SQL, JWT, REST, OpenAPI, Swagger, Docker, GitLab, AWS, EKS, ECR, LoadBalancing, asyncio, typing, DependencyInjection, Decorators, ContextManagers, UnitTesting 🏢 Description: Backend Python Developer We are looking for an experienced Backend Python Developer to join a long‑term project for the pharmaceutical industry . The project focuses on building reliable, secure, and scalable backend services that support critical business and data-driven processes in a regulated environment. High code quality, testability, and well-designed APIs are key success factors. Work mode: 100% remote Tasks Designing and implementing backend services with a strong focus on API quality and reliability Creating well-structured, self-documented REST APIs Writing clean, maintainable, and testable Python code Collaborating closely with other engineers and DevOps teams Ensuring performance, security, and scalability of implemented solutions Requirements Solid understanding of best practices for API endpoint design and error handling Practical knowledge of JWT tokens and authentication mechanisms Strong experience with Python 3.12 or newer Writing correctly typed code using Python typing Practical experience with asynchronous programming Knowledge of decorators and context managers Habit of writing unit tests alongside production code Hands-on experience with FastAPI and Pydantic Good understanding of Dependency Injection Ability to design correct and robust models (validation, sanitization) Experience with self-documenting APIs using OpenAPI/Swagger Practical experience with SQLAlchemy 2.0 Ability to write clear and reasonably efficient database queries Basic understanding of Docker image creation principles Ability to read and modify GitLab CI/CD pipelines Practical experience navigating AWS services , especially: EKS, ECR, Load balancing Fluent English 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. About 7N Constantly searching for projects, difficult rate negotiations, lack of development support – sounds familiar? At 7N, you gain not only stability of contracts but also the personal involvement of a dedicated agent who ensures your professional comfort and continuous access to development initiatives. Our mission is to provide stable and rewarding collaborations that drive your success as an IT expert and the success of our clients. We build long-lasting relationships based on Scandinavian values and 30 years of experience creating IT solutions for over 200 organizations.

🏢 Summary: The offer is for a Data Scientist responsible for designing, building, and deploying machine learning and AI solutions that drive marketplace performance at scale. The role covers end-to-end model development, from problem formulation to production, using advanced statistical methods, deep learning, and Generative AI on large-scale data in cloud environments. You will work closely with data engineers and business stakeholders to deliver impactful, production-grade ML systems. 🗂️ Requirements: Experience in data analysis using SQL, Experience building and deploying ML models in production environments, End-to-end experience designing machine learning models, Ability to translate business problems into ML solutions, Strong communication skills with business stakeholders, Experience with ML and AI, especially LLMs, Proficiency in Python, Understanding of statistical and machine learning methods, Practical and theoretical knowledge of Generative AI and Agentic AI, English and Polish proficiency at B2+ level, Degree in Mathematics, Physics, Economics, Computer Science or related field, or equivalent ML/Data Science experience 📃 Skills: Python, SQL, GCP, BigQuery, VertexAI, CloudComposer, Dataflow, Airflow, PySpark, LLM, GenAI, AgenticAI, DeepLearning, Bayesian, Boosting, CausalInference, Optimization, Kubernetes, Docker, Consul, GitHub, GitHubActions, Gemini, GPT 🏢 Description: Data Scientist Location: Warszawa, PL, 00-841 Company: Allegro sp. z o.o. Team: Technology Contract Type: Employee We are looking for a Data Scientist with a strong analytical mindset - someone who enjoys decoding market mechanisms and applying statistical models to solve complex platform puzzles. Our team drives the logic that powers a trustworthy and competitive marketplace. As part of the Tech organization dedicated to delivering the best experiences for our sellers, we specialize in data solutions focused on driving their growth - particularly through optimizing price competitiveness, expanding product selection, and supporting strategic campaigns. Composed of Data Scientists, Data Engineers, and Analysts, we develop statistical models and rules to measure and improve our products and services. We work in close collaboration with developers and product teams across the entire project lifecycle, from ideation to implementation. Our ultimate goal is to create a seamless experience where partners can rely on fair visibility rules, and Customers can trust every product detail they see on the platform. The brain of the entire Allegro. Here, we implement projects based on a practical application of artificial intelligence and Data Science on a scale unprecedented in Poland. In order to effectively implement ML solutions and automate existing processes, we need the support of inquisitive, experienced, and data-driven individuals. The ones willing to be up to date on newest algorithms and advancements in AI, from new deep learning architectures, explainable AI and GenAI but still grounded and aware of statistics and predictive modelling. In Allegro you will work with solutions from prototypes to create stable, high-performance solutions and combine these services with batch and stream processing analyzing real BigData (also in the public cloud). What will your job involve? Co-creating projects on each stage - from concept to productization - to deliver insights and models solving business problems from different areas Using a wide range of model types, including boosting models, Bayesian methods, causal inference, optimization methods, deep learning and Generative AI solutions including LLMs and Agentic AI Working hand-in-hand with our Data Engineers who support the heavy-lifting of data processing on GCP Working not only with tabular data, but also with spatial data, natural language texts, images and time series Taking part in implementations of off-line and on-line models Brainstorm, provide mentorship, share knowledge Cooperation with other teams: business stake-holders, analytics, data engineers Why should you work with us? Data Science plays a key role in the operation of Allegro - we are a data-driven technology company, and through the models and analyses provided you will have a significant impact on one of the largest eCommerce platforms in the world You will have a possibility of developing AI tools from prototypes to large production solutions that will have real impact on our users, merchants and employees. Thanks to the wide range of projects we carry out, you will never run out of interesting challenges Support of experienced Data Scientists - there is always someone to exchange ideas with, because we have the best specialists and experts in their field on board You will have access to huge data sets and the latest data processing technologies You will have the opportunity to learn the tools and technologies in practice: Python (including various ML libraries), GCP environment (BigQuery, VertexAI, Cloud Composer, Dataflow), Airflow, PySpark, Gemini/GPT models You will learn good programming, engineering and code management practices We share our knowledge at industry conferences and trainings, we are an active participant and co-creator of the Data Science / Machine Learning community in Poland and in the world Our offer is addressed to people who: Have experience in data analysis using SQL and building machine learning solutions in production environments, especially with end-to-end experience in designing ML models Want to translate business challenges into ML problems Can clearly communicate with business units - from formulating an analytical problem to a clear and intuitive presentation of results Have experience with ML and AI (especially LLMs) Are highly independent, showing strong work organization and taking full responsibility for their given projects Program in Python and efficiently use basic development tools Understand statistical and machine learning methods Embrace modern tooling, specifically possessing practical and theoretical knowledge of Generative AI and Agentic AI principles (coding tools, prompting, validation). The ideal candidate enthusiastically leverages GenAI coding tools (like Copilot) to boost and automate workflows,  remaining up-to-date and critically engaged with the newest GenAI tooling. Speak English and Polish at a B2+ level or higher Graduated with a degree strongly related to statistical/mathematical modeling, such as Mathematics, Physics, Economics, Computer Science (or similar major) or have job experience in data science / ML positions What's in it for you: Flexible working hours in the hybrid model (4/1) - working hours start between 7:00 a.m. and 10:00 a.m. We also have 30 days of occasional remote work. Annual bonus based on your annual performance and company results. Well-located offices (with e.g. fully equipped kitchens, bicycle parking, terraces full of greenery) and excellent work tools (e.g., raised desks, ergonomic chairs, interactive conference rooms). A 16" or 14" MacBook Pro or corresponding Dell with Windows (if you don't like Macs) and all the necessary accessories. A wide selection of fringe benefits in a cafeteria plan - you choose what you like (e.g., medical, sports or lunch packages, insurance, purchase vouchers). English classes that we pay for related to the specific nature of your job. A training budget, inter-team tourism ( see more here ), hackathons, and an internal learning platform where you will find multiple trainings. An additional day off for volunteering, which you can use alone, with a team, or with a larger group of people connected by a common goal. Social events for Allegro people - Spin Kilometers, Family Day, Fat Thursday, Advent of Code, and many other occasions we enjoy. And that's just the beginning! You can read more about the benefits here . #goodtobehere means that: You will join a team you can count on - we work with top-class specialists who have knowledge- and experience-sharing in their DNA. You will love our level of autonomy in team organization, the space for continuous development, and the opportunity to try new things. You get to choose which technology solves the problem and you are responsible for what you create. You will value our Developer Experience and the full platform of tools and technologies that make creating software easier. We rely on an internal ecosystem based on self-service and widely used tools such as Kubernetes, Docker, Consul, GitHub, and GitHub Actions. Thanks to this, you can contribute to Allegro from your very first days on the job. You will be equipped with modern AI tools to automate repetitive tasks, allowing you to focus on developing new services and refining existing ones (also leveraging AI support). You will create solutions that will be used (and loved!) by your friends, family and millions of our customers. You will meet the Allegro Scale, which starts with over 1000 microservices, an open-source data bus (Hermes) with 300K+ rps, a Service Mesh with 1M+ rps, tens of petabytes of data, and production-used machine learning. You will become part of Allegro Tech - We speak at industry conferences, cooperate with tech communities, run our own blog (it's been over 10 years!), record podcasts, lead guilds, and we organize our own internal conference - the Allegro Tech Meeting. We create solutions we love (and can) to talk about! Send us your CV and… see you at Allegro!

🏢 Summary: Senior Data Engineer role focused on designing and building scalable serverless data ingestion pipelines in AWS within the healthcare domain. The position emphasizes strong Python engineering, cloud architecture leadership, and implementation of modern data platforms and DevOps practices. The role involves driving technical excellence and delivering reliable, high-impact data solutions in an international environment. 🗂️ Requirements: 10+ years of experience in Python programming, Strong software engineering skills in data processing, Extensive experience with AWS Cloud and Serverless Architecture, Hands-on experience with AWS Lambda, S3, and Cognito, Experience building E2E automated tests for data pipelines, Practical knowledge of Data Mesh and Medallion Architecture, Experience with Infrastructure as Code using AWS CDK or Terraform, Experience with CI/CD pipelines using GitLab or GitHub Actions, Experience with ETL/ELT processes and dbt, Experience working with GraphQL, Minimum B2 level English proficiency 📃 Skills: Python, AWS, Lambda, S3, Cognito, Boto3, DataMesh, Medallion, CDK, Terraform, GitLab, GitHubActions, ETL, ELT, dbt, GraphQL, CI/CD 🏢 Description: We are looking for a highly skilled Data Engineer to join our client in the healthcare sector. Our requirements: Technical Expertise: Python Programming: 10+ years of experience with strong Software Engineering skills focused on data processing. AWS & Serverless: Extensive experience with AWS Cloud, specifically focusing on Serverless Architecture and services (including AWS Lambda , AWS S3 Tables , and AWS Cognito ). Automated Testing: Proven experience in developing End-to-End (E2E) automated tests to ensure pipeline reliability, utilizing tools such as Boto3 for AWS resource validation. Data Concepts: Practical knowledge of Data Mesh and Medallion Architecture , along with general data processing and analysis. DevOps & IaC: Hands-on experience with Infrastructure as Code ( AWS CDK or Terraform ) and CI/CD pipelines ( GitLab pipelines or GitHub Actions ). Modern Tooling: Experience with ETL/ELT solutions, dbt , and GraphQL . Communication & Soft Skills: English Language: Minimum B2 level , enabling smooth daily technical and business communication in a global environment. Collaboration: Excellent communication skills and the ability to thrive in a collaborative, international team. Standards: A strong commitment to high standards of ethics, quality (Clean Code), and reliable delivery. Nice to have: Experience with Snowflake and SQL . Knowledge of Data Vault 2.0 modeling. Experience with Databricks . Familiarity with the Microsoft ecosystem: C# / .Net, T-SQL, SQL Server , and Azure DevOps . Experience with Star Schema database modeling. Knowledge of Descriptive Statistics. Your responsibilites: Design and build scalable Data Ingestion pipelines within the AWS cloud ecosystem. Lead technical delivery and implementation of core platform components, ensuring architectural integrity across the entire data lifecycle. Collaborate with Engineering Managers and cross-functional teams across the globe and Poland. Drive technical excellence by improving team processes, architecture standards, and engineering best practices. Support and consult with stakeholders to ensure successful delivery of high-impact, data-driven solutions. Contribute to the growth and maturity of the team’s cloud and data engineering capabilities. We offer: Challenging role within the company that creates innovative solutions. Work in international environment on demanding projects. Remote work model. Subsidized private medical care, life insurance, multisport card. Integration meetings. Employee referral program. If you have a deep expertise in Python and AWS , and building scalable Serverless data architectures is where you truly excel, this is the perfect role for you!

🏢 Summary: Analytics Engineer role focused on building scalable healthcare data products and analytics-ready models for PBM and care navigation operations using dbt, SQL, and cloud data platforms. The position involves developing reliable data pipelines, implementing data quality frameworks, and enabling self-service and AI-assisted analytics capabilities. Candidates will collaborate across technical and business teams to create maintainable, auditable, and high-performance data solutions. 🗂️ Requirements: 3+ years experience in analytics engineering, data modeling, data warehousing or related field, Strong experience with dbt, Advanced SQL proficiency, Experience developing data transformations and workflows using Python, Understanding of dimensional modeling and scalable data architecture, Experience building production-grade data models and data quality tests, Experience with cloud data warehouses, Experience orchestrating and monitoring data pipelines, Experience working in cloud environments, Familiarity with Git and CI/CD workflows, Knowledge of testing and deployment workflows, Strong problem-solving and analytical skills, Effective communication and collaboration skills 📃 Skills: dbt, SQL, Python, Redshift, Snowflake, BigQuery, Airflow, Dagster, AWS, Git, CI/CD, MCP, Claude 🏢 Description: ABOUT THE ROLE: We are seeking an Analytics Engineer to join our Analytics Platform team to design, build and maintain scalable data products that power our Pharmacy Benefit Management (PBM) and Care Navigation organizations. In this role, you will be responsible for transforming complex healthcare data into trusted, analytics ready datasets that support operational reporting, client insights, financial analysis and strategic decision-making. You will partner closely with Analytics, Data Engineering, Clinical, Client Success, Product and Operations teams to build reliable and scalable data models within our data foundry. This role is ideal for someone who is passionate about analytics engineering, has strong dbt expertise, enjoys solving complex healthcare data challenges and thinks beyond individual requests to build reusable and maintainable systems. You will play a key role in shaping the future of our data platform by developing high-quality data products, establishing engineering best practices, and helping the organization evolve toward AI-enabled and self-service analytics capabilities. WHAT YOU'LL DO: • Apply hands on analytics and data expertise to solve complex, fast moving financial and operational problems in the health tech space • Design, develop and maintain scalable, analytics ready data models (primarily in dbt) that power a PBM and care navigation data ecosystem that support client reporting, performance analytics, operational analysis and self-service business intelligence • Translate complex pharmacy benefits and healthcare navigation workflows, business rules and operational processes into transparent, maintainable, and auditable data models • Partner closely with data and analytics engineers, data analysts and business stakeholders to deliver reliable data products that can be leveraged across multiple use cases and continuously optimize data models and warehouse performance to support large-scale PBM/care navigation datasets and growing business needs • Implement automated data quality checks, testing frameworks and reconciliation processes to ensure data reliability • Establish documentation standards, lineage and analytics engineering guardrails that promote transparency and auditability • Contribute to engineering best practices including version control, CI/CD, incremental models, code reviews, and observability • Contribute to data governance by establishing modeling standards, documentation and guardrails that support auditability, explainability and long term maintainability • Build data foundations that enable future agentic analytics engineering use cases, including self-service analytics and AI-assisted insight generation • Stay informed on emerging technologies and identify opportunities to incorporate AI into analytics engineering workflows WHO YOU ARE: • 3+ years of experience in analytics engineering, data modeling, data warehousing or a related field • Strong experience with dbt and modern analytics engineering best practices (required) • Advanced SQL proficiency and experience developing data transformations and workflows using Python • Strong understanding of dimensional modeling, medallion architecture, semantic modeling and scalable data architecture principles • Experience building and maintaining production-grade data models, data quality tests, and documentation • Experience working with cloud data warehouses such as Amazon Redshift, Snowflake, or BigQuery • Experience orchestrating and monitoring data pipelines using tools such as Apache Airflow, Dagster etc. • Experience working within cloud environments, preferably AWS • Familiarity with software engineering practices including Git, CI/CD, pull request reviews, testing, and deployment workflows • Interest or experience in leveraging AI-enabled development workflows and analytics tooling, including experience with or willingness to learn technologies such as Claude, Claude Skills, Model Context Protocol (MCP) and AI assisted engineering practices • Strong problem-solving and analytical skills with a focus on building scalable, maintainable data solutions • Effective communication skills and the ability to collaborate with both technical and non-technical stakeholders COMPENSATION: $100,000 - $140,000 annually, in addition to bonus and equity. Compensation offered will be determined by geographic location, experience, and qualifications.