Regular .NET Developer for Card Payment Solutions

About the RoleJoin our dynamic team at margo-group as a Regular .NET Developer, where you will play a pivotal role in the development and maintenance of our core card payment systems. You will be involved in everything from transaction authorization and settlement to integrations with external payment services, catering to hundreds of thousands of transactions daily. Ensuring optimal performance, availability, and security is our top priority.Work Model: This is a remote-first position, with scheduled on-site team meetings twice a month in Warsaw.Key Responsibilities- Develop and maintain .NET applications within the card payment sector.- Design and implement new functionalities in compliance with business and regulatory requirements.- Integrate systems with external services using REST, SOAP, and messaging queues.- Optimize application performance, availability, and security.- Collaborate with Analysts, Architects, and QA teams in an Agile/Scrum environment.- Participate in SIT/UAT testing, code reviews, and the preparation of technical documentation.Required Skills- Proven commercial experience with C# and .NET (Framework/Core).- Familiarity with ASP.NET Core, Angular, and WebAPI.- Knowledge of Entity Framework, LINQ, and Dapper.- Proficiency with SQL Server (T-SQL) and query optimization techniques.- Understanding of SOLID principles and design patterns.- Experience writing unit tests (xUnit/NUnit).- Knowledge of system integrations (REST, SOAP, JSON, XML).- Experience working in an Agile environment.- Familiarity with Git, CI/CD, and TeamCity.Language Requirements- Polish: Native or C2 level (required).- English: Professional level for technical documentation.Nice to Have- Experience in the card payments/payment processing domain.- Knowledge of Docker and Kubernetes.- Experience with high-availability or complex distributed systems.

About Capco Poland Location: Warsaw, Poland Work Model: Hybrid (3 days per week in the office) Capco Poland specializes in technology and management consulting for the financial sector. The team supports clients in banking, payments, capital markets, wealth, and asset management. The company values agility, innovation, and a people-first approach. Growth for both clients and employees is a core focus. Role Overview: IT Architect – Card Payment Transformation This role centers on shaping card payment architecture for a major transformation program at a leading Polish bank. The IT Architect will design integration solutions across SWITCH, acquiring platforms, and core banking systems. The position calls for deep technical expertise and familiarity with regulatory standards. Key Responsibilities Lead the design of scalable and reliable integration architectures for card payment systems. Work across SWITCH, acquiring, and core banking platforms to ensure seamless connectivity. Define PCI DSS scope and plan remediation activities to meet compliance requirements. Collaborate with business, technology, and compliance teams throughout the transformation. Requirements Fluency in Polish (mandatory). Proven experience as an IT Architect, ideally within card payments or banking transformation projects. Strong understanding of integration architecture and regulatory frameworks such as PCI DSS. Ability to work effectively with both technical and non-technical stakeholders.

Join our team as a .NET Developer and be part of our dynamic tech environment where innovation and collaboration thrive. In this role, you will develop high-quality software solutions and contribute to exciting projects that impact our clients positively.

Join our dynamic team at Altersolutions as a Fullstack .NET Angular Developer! In this role, you will have the opportunity to work with cutting-edge technologies and contribute to innovative projects that impact our clients positively. Collaborate with cross-functional teams to design, develop, and implement robust applications that meet business requirements.

About Capco Poland Capco Poland specializes in technology and management consulting for the financial sector. The team supports clients in banking, payments, capital markets, wealth, and asset management. The company values quick thinking, innovation, and prioritizing people. Capco fosters an entrepreneurial culture and aims to attract professionals who want to grow alongside clients. Recognized for expertise in banking and payments Supports an agile and innovative work environment Focuses on building a team of professionals who share the company vision Location and Work Model Location: Warsaw, Poland Work model: Hybrid, with a preference for 3 days per week in the office Role Overview: IT Consultant – Integration & Development – Cards Transformation This role is part of a major cards transformation program for a leading Polish bank. The IT Consultant/Developer will design, build, and configure integrations across complex system landscapes. Responsibilities include supporting transactional flows for POS, ATM, and e-commerce channels. The position emphasizes delivering reliable, scalable, and observable solutions using current technologies, ensuring consistency and resilience across various interfaces. Fluency in Polish is mandatory.

About Us:MARGO Group is a leading international IT consulting firm established in 2005 in Paris, with additional offices in London and Warsaw. We excel in IT outsourcing and the provision of highly skilled professionals for intricate technology projects throughout Europe. Our commitment at MARGO is to foster long-lasting partnerships, uphold transparency, and encourage continuous growth and development.

Join altersolutions as a .NET Developer and be part of a dynamic team in Warsaw, where you will contribute to exciting projects and develop innovative software solutions. We seek passionate developers who thrive on creativity and collaboration.

Join our dynamic team as a Junior .NET Developer at netcompany1 in Warsaw. In this role, you will have the opportunity to develop innovative software solutions using the latest technologies. You will collaborate with experienced developers, gain hands-on experience, and contribute to exciting projects that make a real impact.

About Us:MARGO Group is a leading international IT consulting firm established in 2005 in Paris, with additional offices in London and Warsaw. We specialize in IT outsourcing and providing top-tier experts for intricate technology projects across Europe. Our focus is on fostering long-term partnerships, maintaining transparency, and promoting continuous development.About the Role:We are seeking a Senior .NET Developer with Angular expertise to engage in long-term enterprise banking projects within structured development environments. You will be involved in creating complex business applications while collaborating closely with Analysts, QA Engineers, and Product stakeholders.This position is intended for seasoned developers with over 5 years of experience who prioritize clean code, testing, sound architectural practices, and uphold high engineering standards.Work Model: Remote-first with scheduled on-site team meetings (2 days per month in Warsaw). Office attendance is primarily for team alignment, planning sessions, and direct collaboration.

Join MARGO as a Senior Fullstack .NET Developer!Are you passionate about technology and looking to make an impact in the field of IT consulting? MARGO, an international leader in IT consulting, is seeking a Senior Fullstack .NET Developer with Angular expertise to join our dynamic team in Warsaw. Established in 2005 in Paris, with additional offices in London and Warsaw, we pride ourselves on providing top-tier IT experts for complex enterprise projects across Europe. At MARGO, we are committed to building long-lasting partnerships, ensuring transparency in our processes, and maintaining technical excellence in everything we do.

Dołącz do naszego zespołu jako Fullstack Developer (.NET + Angular) i pracuj z wiodącym klientem w branży ubezpieczeniowej. Będziesz odpowiedzialny za projektowanie oraz rozwijanie nowoczesnych aplikacji, które spełniają potrzeby naszych klientów. Jeśli posiadasz doświadczenie w .NET oraz Angular, ta oferta jest dla Ciebie!

Join Us at Adyen! Adyen is a leading provider of payments, data, and financial solutions, serving prestigious customers such as Meta, Uber, H&M, and Microsoft. We are recognized as the go-to financial technology platform, engineered for those with ambitious goals. At Adyen, we foster a culture that empowers our people to thrive, providing them with opportunities to own their careers. Our motivated teams tackle unique technical challenges at scale, collaboratively delivering innovative and ethical solutions that enable businesses to achieve their goals more efficiently. About the Role: We are seeking a dynamic Payments Partnerships Manager to elevate Adyen's strategy and initiatives with key payment methods across the EMEA region, which includes card networks, local and alternative payment methods, and financial institutions. In this pivotal role, you will spearhead impactful partnerships, leveraging your influence and determination to forge strong commercial collaborations throughout the region. You will collaborate closely with a diverse array of cross-functional stakeholders to build strategic and successful relationships. This is a full-time opportunity based in our Warsaw office, reporting directly to the Head of Payment Partnerships for EMEA. Your Responsibilities: Manage strategic partnerships: Cultivate and maintain relationships with leading payment methods at both local and continental levels. Define and execute a proactive, multi-year strategy across various payment methods, including card-based, bank-based, and alternative methods. Negotiate complex agreements: Drive alignment with senior counterparts at partner organizations and internal stakeholders to ensure Adyen's leadership in payment innovation. Deliver high-impact projects: Lead high-caliber, complex initiatives that enhance financial and operational performance. Employ strategic thinking to effectively implement key initiatives at scale, balancing commercial opportunities with product challenges. Cross-functional collaboration: Work alongside product, commercial, and finance teams to develop and execute go-to-market strategies. Provide market insights to accelerate our product roadmap and commercialization efforts. Who You Are: 5+ years of relevant experience in payments strategic partnerships. In-depth understanding of the payments landscape, with strong analytical skills to navigate complex scenarios.

Join margo-group as a Fullstack Developer specializing in .NET and Angular, focusing on cloud-native applications. In this role, you will collaborate with cross-functional teams to design, develop, and deploy robust applications that leverage the power of cloud technology. If you are passionate about innovative software solutions and enjoy working in a dynamic environment, we want to hear from you!

Join our dynamic team at Netcompany as a Junior .NET Developer, where you'll be part of a vibrant working environment focused on innovation and collaboration. In this role, you'll contribute to the development of cutting-edge banking solutions, enhancing user experiences through efficient and scalable applications.

As a trailblazer in online flash sales since 2001, Veepee stands as a cornerstone in the European e-commerce landscape, partnering with over 7,000 brands to deliver exceptional deals on a wide array of products for a limited time. With a remarkable turnover of 3.3 billion euros incl. VAT in 2024, Veepee boasts a dynamic workforce of 5,000 employees across 10 countries, operating in sectors such as fashion, home, wine, travel, and beauty. JOB DESCRIPTIONWe are excited to invite an experienced Backend/Full Stack Developer to join our innovative Logistics Tooling team at VeepeeTech. This pivotal role involves developing cutting-edge solutions that enhance warehouse operations and optimize the Veepee return process, ensuring an efficient and seamless experience for our customers.

JetBrains is hiring a Product Designer to focus on the .NET ecosystem. This position involves designing developer tools that improve workflow and make daily tasks more enjoyable. The role is open to candidates in Belgrade, Berlin, Limassol, Madrid, Munich, Prague, Warsaw, Yerevan, or remote within Germany. What you will do Collaborate with engineers, product managers, and fellow designers to build user-centered solutions for .NET products. Shape the visual and interactive aspects of developer tools, ensuring usability aligns with technical needs. Turn research findings and user feedback into clear, effective design concepts. About JetBrains JetBrains creates intelligent software tools used by millions of developers worldwide. The team emphasizes thoughtful design and practical problem-solving to support the work of software professionals.

Join Skelar as a Payments Manager!At Skelar, a leading venture builder, we are on a mission to create innovative international product IT companies that excel in the world of venture investments. Together with co-founders, we assemble strong teams to launch product-driven IT businesses and succeed in global markets.About RiseGuide: Our EdTech platform is dedicated to self-improvement, drawing inspiration from renowned role models. Users can overcome detrimental habits through advice from experts like Andrew Huberman and Simon Sinek, enhance their social media presence with strategies from Alex Hormozi and MrBeast, and develop charisma inspired by principles from Robert Downey Jr. and Steve Jobs. We aim to redefine the self-improvement industry by granting users expert insights on demand.Key Achievements:Achieved unit economics in just 6 weeks and are actively scaling.Over 300,000 paid users, with an impressive 4.6/5 rating on the App Store and 4.4/5 on TrustPilot.Ranked in the top 3 for revenue among launches in the Genesis ecosystem over the past 2 years.A diverse team of over 70 professionals, hailing from BetterMe, Welltech, Jooble, and top management programs globally.We are currently seeking a Payments Manager to join our dynamic team.Key Responsibilities:Payment Optimization: Analyze and identify growth points for enhancing payment processing efficiency, conducting A/B testing for routing and monetization strategies.Risk and Tax Management: Analyze and improve key risk metrics such as VAMP rate (VISA), Fraud rate (Mastercard), and Dispute & Claim rates (PayPal); perform A/B tests to optimize tax burdens.Scalability of Payment Infrastructure: Maintain and develop relationships with current banking partners; implement new technical and commercial opportunities to enhance service quality and reduce costs.

Join Alter Solutions as a Java Developer in Warsaw, where you will be part of a dynamic team committed to delivering high-quality software solutions. Your expertise in Java programming will be crucial in developing robust applications that meet our clients' needs.

Join our dynamic team at Alter Solutions as a Java Developer! We are seeking a talented individual who is passionate about coding and eager to contribute to innovative projects. As a Java Developer, you will play a crucial role in developing high-quality software solutions, collaborating with cross-functional teams, and ensuring the best practices in software development are followed.

Company: Capco Poland Location: Warsaw, Poland Work model: Hybrid (3 days per week in the office) About Capco Poland Capco Poland helps financial institutions tackle complex challenges across banking, payments, capital markets, wealth, and asset management. The team combines technology and management consulting expertise to deliver digital transformation for clients in the financial sector. The culture at Capco values flexibility, speed, and entrepreneurship. Teams move quickly, encourage new ideas, and put people first. Growth is a shared goal, both for clients and for employees. What Sets Capco Apart Focus on innovation in banking, payments, capital markets, wealth, and asset management Agile and adaptive work environment Commitment to building a team of highly skilled professionals with shared ambition Role Overview: Business/System Analyst – Cards Transformation Join a leading cards transformation program shaping Poland’s banking sector. This position supports a major initiative for a well-known Polish bank, focusing on card processing, system integration, and transaction flows. The analyst will work at the intersection of technology, business, and compliance. Responsibilities include navigating complex system environments, supporting integrations, and collaborating with stakeholders across departments. Fluency in Polish is required for this role.