Xebia

QA Engineer

• designing, implementing, and maintaining automated test solutions for web and backend systems
• developing and evolving test automation frameworks using modern tools and technologies
• planning, structuring, and designing test scenarios and test cases based on business and technical requirements
• automating backend/API tests
• actively participate in the full Software Development Life Cycle (SDLC), including requirements analysis, refinements, reviews, and retrospectives.

Senior QA Automation, Java

SDET

• designing and developing automation frameworks (Java / Playwright)
• creating and maintaining backend/API automated tests (e.g. RestAssured or similar)
• preparing and structuring test scenarios and test cases
• executing API tests using Postman
• integrating tests with CI/CD pipelines (preferably Jenkins)
• performing performance testing activities
• reviewing automation solutions and ensuring best practices
• mentoring junior testers and supporting knowledge sharing within the team

Mid QA Automation Engineer, Java, Playwright

Software Engineer

• Design, develop, and maintain cross-platform mobile apps using Flutter
• Write clean, reusable, and maintainable code
• Optimize app performance across devices and screen sizes
• Collaborate with product managers, designers, and backend engineers
• Integrate REST APIs and third-party services
• Apply design patterns and best practices (SOLID, architecture)

Mid Mobile Developer – Flutter

Android Engineer

• Develop and maintain Android applications (Kotlin)
• Implement new features and improve existing ones
• Collaborate with backend, product, and design teams
• Write clean, scalable code (MVVM / Clean Architecture)
• Integrate REST APIs and ensure app performance
• Participate in Agile ceremonies and code reviews.

Mid Android Developer

Product Manager

• collaborating with stakeholders to identify and understand requirements impacting our data products by creating clear and actionable user stories
• conducting regular stakeholder engagement & serve as the primary point of contact
• responsible for a healthy backlog management on Jira
• defining and prioritizing features based on value & business urgency for delivery in a Scaled Agile environment
• participating in sprint planning meetings
• defining sprint goals
• working closely with the development team to ensure that user stories are well-understood, estimated accurately, and delivered within the scheduled iterations
• defining the product & solution vision and roadmap while aligning with overall business objectives and compliance needs
• working closely with data engineering teams to ensure the successful delivery of data products
• proactively identifying gaps in the current product offering and leading the effort to develop solutions that drive business value
• staying updated on EMEA changes and industry trends to proactively adapt data and analytics strategy for reporting.

Data Product Owner

• Define and implement a modern performance testing strategy
• Design, implement, and own an end-to-end performance test strategy
• Build and maintain journey-based performance tests for key user flows
• Define performance benchmarks (SLAs/SLOs) and run performance baselines
• Set up monitoring/observability practices for performance testing
• Integrate performance testing into CI/CD pipelines
• Lead and mentor the team on performance engineering practices
• Collaborate with engineering and product teams on performance goals

Senior QA Automation, Performance Testing Engineer

Data Scientist

• Designing and developing bidding and optimization strategies for CPC-based auction systems, including advanced objectives such as target ROAS
• Optimizing auction mechanisms (ranking, pricing, filtering) to balance platform revenue, advertiser value, and marketplace stability
• Building and maintaining offline simulation environments, including counterfactual simulations and auction replay systems, to safely evaluate algorithmic changes
• Designing and implementing feedback loops and control mechanisms to ensure stable and robust system behavior under dynamic market conditions
• Conducting advanced ecosystem-level analytics on large-scale datasets to identify nonlinear effects, equilibrium points, and systemic risks
• Designing, executing, and analyzing complex experiments and causal inference studies, accounting for network effects and long-term system impact
• Contributing to the evolution toward smart, autonomous bidding and auction optimization through data-driven initiatives and roadmap development

• rozwijanie i utrzymywanie testów automatycznych dla aplikacji frontendowych i backendowych
• przeprowadzanie testów manualnych, gdy to konieczne, aby zapewnić jakość produktu
• projektowanie i wdrażanie frameworków automatyzacji testów
• bliska współpraca z programistami, QA i zespołami DevOps
• integrowanie automatycznych testów z pipeline'ami CI/CD
• zapewnianie wysokiej jakości aplikacji internetowych dzięki kompleksowym strategiom testowym.

QA Automation, C#

Cloud Engineer

• Designing and administering SQL Server databases in AWS environments (RDS, EC2)
• Planning and executing database migrations from on-premise to AWS using tools such as AWS DMS
• Ensuring database performance, security, and compliance with client standards
• Resolving compatibility issues during migration and upgrade processes
• Supporting CI/CD database deployments using tools such as GitLab and Flyway
• Monitoring database performance and troubleshooting issues
• Collaborating with cross-functional teams in Agile/Kanban environments

Senior SQL Server DBA – AWS, Cloud Migration

• designing, developing and maintaining automated tests using Cypress
• performing manual testing for web and mobile applications
• creating and maintain BDD test scenarios using Cucumber
• executing API testing using Postman
• validating data and perform checks using database queries
• collaborating with development teams to ensure high-quality releases
• integrating automated tests into CI/CD pipelines
• participating in test planning, test case design, and defect tracking
• ensuring test coverage across different platforms and devices

QA Automation, Manual, Cypress

Full-stack Engineer

• Developing backend services using Kotlin or Java
• Processing large datasets using Scala and BigQuery
• Designing and maintaining data pipelines with Apache Airflow in the Google Cloud Composer environment
• Working with Google Cloud Platform to ensure scalable and efficient solutions
• Preparing and transforming datasets for machine learning processes
• Supporting AI/ML model training and experimentation
• Performing data analysis and presenting insights to support business decisions
• Collaborating with engineers, data scientists, and stakeholders throughout the project lifecycle

Software Engineer, Data & ML

• Designing, implementing, and maintaining automated test solutions for web and backend systems
• Developing and evolving test automation frameworks using modern tools and technologies
• Planning, structuring, and designing test scenarios and test cases based on business and technical requirements
• Automating backend/API tests
• Actively participating in the full Software Development Life Cycle (SDLC), including requirements analysis, refinements, reviews, and retrospectives

Senior QA Automation Engineer, Java, Playwright

• Designing, documenting, and executing functional and non-functional tests depending on project needs
• Maintaining and enhancing existing test documentation and test cases
• Consulting and supporting the selection of technological solutions within the project
• Evaluating workload and preparing reliable test estimations
• Participating in project meetings and collaborating closely with developers and stakeholders
• Supporting the implementation of the project’s test strategy.

Senior QA Manual Engineer

• Designing, implementing, and maintaining automated test solutions for web and backend systems
• Developing and evolving test automation frameworks using modern tools and technologies (e.g. Playwright, API testing libraries)
• Planning, structuring, and designing test scenarios and test cases based on business and technical requirements
• Automating backend/API tests using tools such as RestAssured, RestSharp, or similar libraries
• Testing and validating solutions built on Salesforce and collaborating closely with development teams working in this ecosystem
• Actively participating in the full Software Development Life Cycle (SDLC), including requirements analysis, refinements, reviews, and retrospectives.

Senior QA Automation, Java

Mid QA Automation Engineer, Java, Playwright

Mid Mobile Developer – Flutter

Mid Android Developer

Data Product Owner

Senior QA Automation, Performance Testing Engineer

Data Scientist

QA Automation, C#

Senior SQL Server DBA – AWS, Cloud Migration

QA Automation, Manual, Cypress

Software Engineer, Data & ML

Senior QA Automation, Java

Senior QA Automation Engineer, Java, Playwright

Senior QA Manual Engineer

QA Automation, Salesforce