Lista ofert pracy

• Analiza złożonych zbiorów danych oraz identyfikacja trendów, zależności i anomalii przy użyciu SQL
• Profilowanie i analiza źródeł danych w celu oceny ich struktury, jakości oraz gotowości do wykorzystania
• Definiowanie i wdrażanie kontroli jakości danych oraz walidacja datasetów
• Dokumentowanie przepływów danych, logiki biznesowej, procesów oraz kontekstu wykorzystania danych
• Współpraca z zespołami Data Engineering, Product oraz ekspertami biznesowymi w zakresie ...

• Min. 5-letnie doświadczenie w analizie danych oraz pracy z dużymi i złożonymi zbiorami danych
• Bardzo dobra znajomość SQL (pisanie złożonych zapytań)
• Doświadczenie w analizie jakości danych oraz walidacji datasetów
• Znajomość procesów Data Discovery oraz profilowania danych
• Umiejętność identyfikacji zależności między źródłami danych oraz analizowania data lineage
• Doświadczenie w dokumentowaniu przepływów danych, procesów oraz logiki biznesowej
• Znajomość ...

As a Senior Python Software Engineer on the Rublon Services team you will:

• Design, build, and evolve Python services and data-driven components that power network planning and delivery applications.
• Develop and maintain data pipelines and processing workflows, turning raw network and spatial data into reliable outputs.
• Work with PostgreSQL to model, query, and migrate application data; write efficient SQL when needed.
• Implement and maintain geospatial capabilities, including working with...

• 5 years of professional software engineering experience, with strong depth in Python (currently using Python 3.11) and ownership of production systems end-to-end.
• Practical experience with PostgreSQL, including writing efficient SQL, understanding indexing/performance basics, and designing reliable schemas.
• Hands-on use of SQLAlchemy and Alembic (or equivalent) for ORM-backed development and managing database migrations safely in production.
• Proven ability to design and evolve ...

• Develop and execute manual test cases based on product requirements and specifications.
• Identify, document, and track defects using bug tracking tools.
• Perform functional, regression, exploratory, and smoke testing to ensure software stability.
• Collaborate with developers, product managers, and other stakeholders to understand requirements and enhance product quality.
• Validate fixes and perform thorough retesting of resolved issues.
• Assist in creating and maintaining test ...

• 6 years of experience in manual software testing.
• Strong understanding of software development life cycle (SDLC), testing methodologies, tools, and processes.
• Strong ownership mindset with the confidence to make decisions and take responsibility for quality outcomes.
• Proactive attitude, identifies risks, raises concerns early, and drives issues to resolution independently.
• Comfortable challenging assumptions and advocating for quality standards across teams.
• Ability to work ...

• Plan and execute infrastructure migrations across multiple environments
• Manage Kafka infrastructure including consumers, producers, and cluster configurations
• Implement infrastructure-as-code for repeatable deployments
• Migrate services to new cloud proxy architectures
• Work with established migration patterns and documentation
• Coordinate with cross-functional teams on dependencies and rollouts

• 5 years of infrastructure/backend development experience
• Experience with Kafka ecosystem (consumers, producers, consumer groups)
• Proficiency in Python or Go
• Proficiency in Kubernetes and container orchestration
• Experience with infrastructure-as-code (Terraform)
• Experience with relational databases
• Experience with AWS or GCP cloud platforms
• Strong communication skills and ability to work in hybrid/remote teams
• Self-directed with ability to work independently
• Upper-Intermediate...

• Work as part of a 4–6-person team with a dedicated Product Owner
• Break down business requirements into deliverable user stories and deploy them iteratively to production
• Take ownership of production support following the rule: “the team builds it, the team supports it”
• Identify technical debt and help balance it with new feature development
• Design solutions aligned with established technology principles and constraints
• Pair with team members and contribute to shared ...

• Minimum 3–5 years of commercial development experience
• Strong, demonstrable experience in Java and Python
• Experience or interest in Machine Learning, NLP, AI or Data Science (nice advantage)
• Ability to mentor and collaborate with other engineers when designing new systems and components
• Good command of spoken and written English
• Previous exposure to event streaming technologies
• Nice to have: Experience with JavaScript or Vue
• Familiarity with additional programming languages ...

• Develop and execute manual test cases based on product requirements and specifications.
• Identify, document, and track defects using bug tracking tools.
• Perform functional, regression, exploratory, and smoke testing to ensure software stability.
• Collaborate with developers, product managers, and other stakeholders to understand requirements and enhance product quality.
• Validate fixes and perform thorough retesting of resolved issues.
• Assist in creating and maintaining test ...

• 6 years of experience in manual software testing.
• Strong understanding of software development life cycle (SDLC), testing methodologies, tools, and processes.
• Strong ownership mindset with the confidence to make decisions and take responsibility for quality outcomes.
• Proactive attitude, identifies risks, raises concerns early, and drives issues to resolution independently.
• Comfortable challenging assumptions and advocating for quality standards across teams.
• Ability to work ...

• Modify existing software to implement new features, correct errors, and improve performance.
• Confer with systems analysts, developers, programmers, and others to design systems and obtain information on project limitations, capabilities, and performance requirements.
• Participate in code reviews, mentor other developers, ensure consistency, quality, and best practices to ensure compliance.

• 4-5 years of real-world experience with modern Python.
• Willingness to come into the Kraków or Gdańsk office 2-3 times per week.
• Experience in at least one of the modern Python frameworks – Django, FastAPI, Flask.
• Experience building and consuming APIs.
• SQL and NoSQL Database skills – ability to execute basic queries containing simple filters and aggregations.
• Knowledge of Python idioms and design patterns.
• Experience using CI/CD processes on a daily basis.
• Experience ...

• Participate in defining the requirements and architecture for the new platform.
• Implement the solution and remain involved in its operations and maintenance post-launch.
• Introduce data governance and management for accurate and comprehensive reporting.
• Adhere to and actively promote engineering best practices, data governance standards, and the use of open standards.
• Build data ingestion & processing pipelines.
• Collaborate with stakeholders to define requirements, develop data ...

• Hands-on experience with Python.
• Proven experience with data warehouse solutions (e.g., BigQuery, Redshift, Snowflake).
• Experience with Databricks or data lakehouse platforms.
• Strong background in data modelling, data catalogue concepts, data formats, and data pipelines/ETL design, implementation, and maintenance.
• Ability to thrive in an Agile environment and collaborate with team members.
• Experience with AWS/GCP/Azure cloud services, including GCS/S3/ABS, EMR/Dataproc, ...

• Design and implement engineering solutions that directly support the customer’s business goals.
• Collaborate closely with Product Manager and end-users of the platform to clarify business needs and shape technical solutions through direct communication (there is no intermediary Business Analyst).
• Create robust UI/UX based on the end user’s needs and existing design system.
• Take ownership of the end-to-end delivery process, from understanding the problem to deploying stable and ...

• JavaScript / React: 6 years of front-end experience, including 2 years with React.
• TypeScript: 2 years of commercial experience.
• Data-heavy UIs: Strong experience with analytics-focused interfaces (charts, tables); Highcharts is a plus.
• UI/UX: Proven ability to deliver high-quality UI/UX, work with or without designers, and improve existing designs relying on the existing design system.
• English (B2): Fluent spoken and written communication.
• **Front-end ...

• Design and develop scalable backend services using C# / .NET
• Build and maintain a message-based microservices architecture
• Develop and enhance React-based front-end applications
• Implement real-time functionality using SignalR
• Manage application state using Redux and RTK Query
• Contribute to cloud-native solutions deployed in Microsoft Azure
• Leverage generative and agentic AI tools (e.g., GitHub Copilot) to improve engineering efficiency
• Collaborate with cross-functional teams to ...

• 5 years of experience with C# and modern .NET
• Proven experience working with message-based microservices architecture
• Solid hands-on experience with Microsoft Azure
• Strong production experience with React
• Practical experience with Redux and RTK Query
• Experience with SignalR
• Hands-on experience using generative AI tools for software development (e.g., GitHub Copilot)
• Strong understanding of clean architecture and distributed systems

• Build and maintain a full E2E testing framework using Testcontainers-go and containerized test environments.
• Develop advanced API mocks, stubs, and simulation layers for complex scenarios.
• Create automated test suites in Go or Python covering functional, integration, and system-level tests.
• Ensure all new features are fully validated as they are developed.
• Improve test stability, reliability, and execution performance across multiple environments.
• Collaborate closely with developers ...

• 5 years of experience in automated software testing or QA engineering.
• Strong programming skills in Go or Python (must be able to write tests, frameworks, and tooling).
• Hands-on experience building E2E test frameworks from the ground up.
• Proficiency with Testcontainers-go or similar containerized testing technologies.
• Solid experience with Docker in test environments (multi-container orchestration, networks, isolated environments).
• Ability to create advanced API mocks, fake services,...

• Design and build responsive, accessible reporting dashboards and data visualizations that help merchants make better business decisions.
• Develop new report types and chart visualizations, expanding beyond tabular data into richer visual formats.
• Improve and maintain existing reporting features, balancing new development with ongoing refinement.
• Collaborate with product managers, designers, and engineers to define requirements and deliver polished experiences—and make sound UX decisions...

• 5 years of professional frontend development experience.
• Willing to come into our Kraków or Gdańsk office 2-3 times per week.
• Strong proficiency in React, with experience building and maintaining complex component architectures.
• Demonstrated experience with data visualization libraries (D3, Recharts, Victory, Chart.js, or similar) and translating data into clear, actionable visuals.
• Track record of building responsive web applications that work well across devices.
• Experience ...