April 25, 2026
Junior Backend Developer (.NET)
Junior • Hybrid
5,000 - 9,000 PLN
Katowice, Poland
Responsibilities
Support the development of a next-generation payment processing platform built using latest versions of .NET.
Implement backend features under the guidance of experienced developers, focusing on clean, reliable and maintainable code.
Collaborate within small agile teams, participate in daily activities, and learn best practices through code reviews and mentoring.
Work with modern .NET technologies and tools to help solve real business problems and continuously improve the platform.
Contribute to team discussions, share ideas, and proactively develop your skills in a supportive engineering environment.
Benefits
Motivizer Benefits Platform to choose and manage all your benefits in one place. You receive a budget (550 PLN monthly). You can choose medical care package, meal tickets, sports cards (we have Multisport and on preferential terms, we have membership cards to one of the most popular Gyms), cinema tickets, shop vouchers, discounts and many more.
Language Courses – you'll have access to a multi-language learning platform enabling you to practice your language skills and learn new ones!
Regular and systematic further training opportunities - both internally and from external providers. We support your ongoing learning and development.
Cooperation within an internal community is our everyday reality. We have networking events, coding challenges, and company parties for different occasions.
Qualifications
Successfully completed university degree in computer science or a comparable field of study.
Some hands-on experience with C# and ASP.NET Core (projects, internships, academic work or commercial experience).
Basic understanding of relational databases (preferably MSSQL) and Entity Framework Core.
Interest in microservices, cloud environments and modern backend development patterns.
Eagerness to learn technologies such as Kafka, CI/CD, and agile development practices.
Ability to write simple, clean and well-structured code with openness to feedback.
Fluency in Polish and good communication skills in English.
Availability to work in a hybrid setup.
About Nexi Digital
Nexi is Europe's PayTech company operating in high-growth, attractive European markets and technologically advanced countries. Listed on Borsa Italiana's MTA, Nexi has the scale, geographic reach and abilities to drive the transition to a cashless Europe. With its portfolio of innovative products, e-commerce expertise and industry-specific solutions, Nexi provides flexible support for the digital economy and the entire payment ecosystem globally, across a broad range of different payment channels and methods. Nexi’s technological platform and the best-in-class professional skills in the sector lets the company operate at its best in three market segments: Merchant Services & Solutions, Cards & Digital Payments and Digital Banking & Corporate Solutions. Nexi constantly invests in technology and innovation, focusing on two fundamental principles: meeting, together with its partner banks, customer needs and creating new business opportunities for them. Nexi is committed to supporting people and businesses of all sizes, transforming the way people pay and businesses accept payments. It offers companies the most innovative and reliable solutions to better serve their customers and expand. By simplifying payments and enabling people and businesses to build closer relationships and grow together, Nexi promotes progress to benefit everyone.
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Qualifications Computer Science degree or equivalent experience and at least 3 years in QA automation with a production track record Hands-on with the .NET test ecosystem (xUnit / NUnit, SpecFlow or Reqnroll, Playwright or Selenium, RestSharp / WireMock .Net) Good C# Experience with Cucumber and comfort with Groovy step definitions (or honest willingness to ramp up — we have an existing BDD suite) API testing (REST, async / event-driven) and performance testing with K6 (or strong JMeter / Gatling / Locust and willingness to move to K6) Azure as a daily environment: Azure DevOps or GitHub Actions, App Service / AKS / Functions, Application Insights as a real source of insight when things break CI/CD, Git, Docker, Agile + Jira / Azure Boards; English at a comfortable working level Fluency in Polish and very good communication in English Availability to work in a remote/hybrid mode. Remote workers, we invite to the office once every month Nice to have Prior exposure to payments / fintech (PCI-DSS, 3-D Secure, PSD2/SCA, tokenization) Security testing basics (OWASP Top 10, API Top 10) Chaos / resilience testing or contract testing (Pact) IaC (Bicep / Terraform) About Nexi Digital Nexi is Europe's PayTech company operating in high-growth, attractive European markets and technologically advanced countries. Listed on Borsa Italiana's MTA, Nexi has the scale, geographic reach and abilities to drive the transition to a cashless Europe. With its portfolio of innovative products, e-commerce expertise and industry-specific solutions, Nexi provides flexible support for the digital economy and the entire payment ecosystem globally, across a broad range of different payment channels and methods. 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Katowice, Poland
120 - 160 PLN
🏢 Summary: Mid/Mid+ Automation Engineer role focused on building and maintaining automated testing for a .NET-based checkout platform in Azure. The position covers end-to-end, API, BDD, and performance testing to ensure safe releases in a payment environment. You will own test automation strategy and execution across CI/CD pipelines and performance workflows. 🗂️ Requirements: Computer Science degree or equivalent experience, Minimum 3 years experience in QA automation in production environments, Hands-on experience with DotNet test ecosystem, Strong CSharp programming skills, Experience with Cucumber and Groovy, Experience in API testing (REST, async or event-driven), Experience in performance testing with K6 or equivalent tools, Experience working in Azure environment, Experience with CI/CD pipelines, Knowledge of Git and Docker, Fluency in Polish, Very good English communication skills 📃 Skills: CSharp, DotNet, xUnit, NUnit, SpecFlow, Reqnroll, Playwright, Selenium, RestSharp, WireMock, Cucumber, Groovy, REST, K6, JMeter, Gatling, Locust, Azure, AzureDevOps, GitHubActions, AKS, AppService, Functions, ApplicationInsights, CICD, Git, Docker, Jira, AzureBoards, Polish, English 🏢 Description: Responsibilities We're looking for a Mid / Mid+ Automation Engineer to join the team building a checkout platform for merchants across Europe. Every release touches real money, so test automation isn't an add-on — it's how the team decides whether we ship. Shape how we test a .NET product that lives entirely in Azure — from unit tests through API, end-to-end and performance Write and maintain test suites in C# / .NET that run reliably in our Azure pipelines Look after our BDD layer (Cucumber + Groovy) — keep scenarios readable for product and reliable in CI Own performance and load testing in K6: realistic traffic models, regression runs, feedback to devs and architects Cover the typical failure modes of a payment system — timeouts, retries, idempotency, partial failures Support junior testers, raise the quality bar on test code, and lead grown-up conversations about risk — in payments a "low priority bug" can still mean lost revenue or a compliance problem Qualifications Computer Science degree or equivalent experience and at least 3 years in QA automation with a production track record Hands-on with the .NET test ecosystem (xUnit / NUnit, SpecFlow or Reqnroll, Playwright or Selenium, RestSharp / WireMock .Net) Good C# Experience with Cucumber and comfort with Groovy step definitions (or honest willingness to ramp up — we have an existing BDD suite) API testing (REST, async / event-driven) and performance testing with K6 (or strong JMeter / Gatling / Locust and willingness to move to K6) Azure as a daily environment: Azure DevOps or GitHub Actions, App Service / AKS / Functions, Application Insights as a real source of insight when things break CI/CD, Git, Docker, Agile + Jira / Azure Boards; English at a comfortable working level Fluency in Polish and very good communication in English Availability to work in a remote/hybrid mode. Remote workers, we invite to the office once every month Nice to have Prior exposure to payments / fintech (PCI-DSS, 3-D Secure, PSD2/SCA, tokenization) Security testing basics (OWASP Top 10, API Top 10) Chaos / resilience testing or contract testing (Pact) IaC (Bicep / Terraform) About Nexi Digital Nexi is Europe's PayTech company operating in high-growth, attractive European markets and technologically advanced countries. Listed on Borsa Italiana's MTA, Nexi has the scale, geographic reach and abilities to drive the transition to a cashless Europe. With its portfolio of innovative products, e-commerce expertise and industry-specific solutions, Nexi provides flexible support for the digital economy and the entire payment ecosystem globally, across a broad range of different payment channels and methods. Nexi’s technological platform and the best-in-class professional skills in the sector lets the company operate at its best in three market segments: Merchant Services & Solutions, Cards & Digital Payments and Digital Banking & Corporate Solutions. Nexi constantly invests in technology and innovation, focusing on two fundamental principles: meeting, together with its partner banks, customer needs and creating new business opportunities for them. Nexi is committed to supporting people and businesses of all sizes, transforming the way people pay and businesses accept payments. It offers companies the most innovative and reliable solutions to better serve their customers and expand. By simplifying payments and enabling people and businesses to build closer relationships and grow together, Nexi promotes progress to benefit everyone.
Technology
Reply Polska Sp. z o. o.
Senior Android Developer (B2B)
Senior
Hybrid
Katowice, Poland
140 - 180 PLN
🏢 Summary: Senior Android Developer role focused on building and maintaining Kotlin-based Android applications with strong emphasis on security, performance, and scalable architecture. The position involves working with modern Android tools, managing API and SDK integrations, and optimizing build and release processes. The role requires close collaboration with cross-functional teams to deliver secure payment-related solutions. 🗂️ Requirements: University degree in Computer Science or related field, 5+ years of Android development experience or 2+ years of Kotlin experience, Strong experience with Jetpack Compose, Proficiency in Android Jetpack components, Experience integrating RESTful APIs, Experience managing third-party SDKs, Strong knowledge of Git, Understanding of Android app publishing process, Hands-on experience with Gradle, Fluency in Polish, Very good English communication skills 📃 Skills: Kotlin, Android, Jetpack, Compose, ViewModel, LiveData, Navigation, REST, Git, Gradle, SDK, API, PCI-DSS 🏢 Description: Responsibilities Implementing features to our Android based apps in collaboration with the team for consistent and aligned design/architecture Ensure security, performance, and scalability in Kotlin based implementation. Optimize Gradle configurations for dependency management, build automation, and streamlined releases. Manage API integrations and third-party SDK/systems lifecycles to ensure smooth interoperability. Provide comprehensive documentation , samples, and developer guides. Collaborate with product managers and merchant integration engineers to align capabilities with business needs. Stay ahead of Android development trends, security updates, and regulatory changes in payments. Qualifications A university degree in Computer Science or a related field. 5+ years of experience in Android development or 2+ years of experience using Kotlin , with a solid understanding of the development tools in Android development tools. Strong experience in Jetpack Compose and modern Android UI development . Proficiency in Android Jetpack components (ViewModel, LiveData, Navigation, etc.). Experience integrating RESTful APIs and managing third-party SDK/framework lifecycles . Strong knowledge of Git (branching strategies, pull requests, conflict resolution, etc.). Understanding of the Android app publishing process (app signing, release management, Play Store distribution). Hands-on experience with Gradle for dependency management and automated build processes Fluency in Polish and very good communication in English Availability to work in a remote/hybrid mode . Remote workers, we invite to the office once every month .Nice to have: Payment industry undestanding and experience Understanding of PCI-DSS or other payment related standards Nice to have Payment industry undestanding and experience Understanding of PCI-DSS or other payment related standards About Nexi Digital Nexi is Europe's PayTech company operating in high-growth, attractive European markets and technologically advanced countries. Listed on Borsa Italiana's MTA, Nexi has the scale, geographic reach and abilities to drive the transition to a cashless Europe. With its portfolio of innovative products, e-commerce expertise and industry-specific solutions, Nexi provides flexible support for the digital economy and the entire payment ecosystem globally, across a broad range of different payment channels and methods. Nexi’s technological platform and the best-in-class professional skills in the sector lets the company operate at its best in three market segments: Merchant Services & Solutions, Cards & Digital Payments and Digital Banking & Corporate Solutions. Nexi constantly invests in technology and innovation, focusing on two fundamental principles: meeting, together with its partner banks, customer needs and creating new business opportunities for them. Nexi is committed to supporting people and businesses of all sizes, transforming the way people pay and businesses accept payments. It offers companies the most innovative and reliable solutions to better serve their customers and expand. By simplifying payments and enabling people and businesses to build closer relationships and grow together, Nexi promotes progress to benefit everyone.
Technology
Reply Polska Sp. z o. o.
Java Developer Backend (B2B)
Mid
Hybrid
Katowice, Poland
100 - 180 PLN
🏢 Summary: The offer is for a Java Software Developer to build and maintain modern microservices applications within a multidisciplinary agile team. The role involves designing solutions, participating in sprint planning, performing code reviews, and working with cloud-based and containerized environments. It requires close collaboration with business stakeholders and focuses on delivering high-quality, scalable systems. 🗂️ Requirements: Completed university degree in Computer Science or related field, Minimum 3 years of professional experience in software development, Strong experience in Java and Spring ecosystem, Solid understanding of microservices architecture, Hands-on experience with Kafka, MongoDB, Oracle and AWS, Experience with Docker and container orchestration platforms, Practical experience with Agile methodologies, Experience with TDD and writing clean, testable code, Very good English and Polish language skills 📃 Skills: Java, Spring, SpringBoot, SpringDataJPA, Microservices, Kafka, MongoDB, Oracle, AWS, Docker, Kubernetes, OpenShift, Scrum, Kanban, XP, TDD 🏢 Description: Responsibilities You will join a vast multidisciplinary agile team of experts and develop modern microservices applications You will take care of the relationship with the business customers in order to understand their needs and expectations Together with your agile team, you will define the next sprint, provide estimates and create solution proposals for complicated tasks Code reviews are standards here and you will help colleagues by giving them advice and providing insightful hints for their growth Qualifications Completed university degree in Computer Science or a related field 3+ years of professional experience in software development Strong experience in Java and Spring ecosystem (Spring, Spring Boot, Spring Data JPA) and solid understanding of microservices architecture Hands-on experience with Kafka, MongoDB, Oracle and AWS cloud , including deployment and maintenance of cloud-based applications Knowledge of Docker and container orchestration platforms such as Kubernetes or OpenShift Practical experience with Agile methodologies (Scrum, Kanban, XP), TDD and writing clean, maintainable and testable code Experience in Banking, Finance or Payments domains will be a strong plus. Very good communication skills in English and Polish and availability to work in a remote or hybrid model (office visit once per month) About Nexi Digital Nexi Digital is a Joint Venture between Reply and Nexi Group. It delivers cutting-edge digital solutions for the Nexi Group, the European PayTech leader. Nexi Digital works with modern technologies, uses agile processes and methodologies, and operates in a collaborative way with the Nexi Group to contribute to the success of all businesses. Our mission is to support the Nexi Group, to build and operate high-quality, distinctive, and timely digital solutions which enable us to deliver value to Nexi’s customers across Europe.