.NET Developer (UN) at altersolutions | Warsaw

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 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.

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 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 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.

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.

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.

At Rydoo, we strive to simplify expense management, allowing individuals to concentrate on what truly matters rather than drowning in receipts. With over a million users relying on us, we facilitate faster and smarter expense submission, approval, and control.In line with this mission, Semine has been developing AI technologies since 2015 to eliminate the tedious and repetitive tasks in accounting, empowering finance teams to work more efficiently.In July 2025, Semine united with Rydoo to revolutionize the future of financial automation. Together, we're crafting a comprehensive, AI-driven platform designed to streamline accounts payable and expense management, enabling businesses to operate with greater simplicity, speed, and intelligence.Our international team exceeds 200 talented individuals who believe that innovative technology should enhance the quality of life. If you have visionary ideas and a desire to create impactful solutions, you will find a welcoming environment here.

Join altersolutions as a Mid/Senior Angular Developer in Warsaw, where you will have the opportunity to work on innovative projects and enhance your skills in a collaborative environment. You will be responsible for developing dynamic web applications using Angular, collaborating with cross-functional teams to design and implement user-friendly interfaces.

Join our dynamic team as an Angular Developer, where you will be instrumental in developing and modifying code for the front-end of a brokerage platform. Collaborate closely with full-stack and back-end developers to create comprehensive solutions using Java and Angular.Contribute to system architecture changes.Implement new features using Angular.Refactor existing code to enhance performance.Develop integrations with RESTful services.Optimize application performance and implement security solutions.Assist with technical design and documentation.

Role overview Miratech is hiring a Senior Full Stack Developer with strong experience in Java and Angular. This role is based in Warsaw. The team builds and maintains web applications that support a range of technology projects. What you will do Design, develop, and maintain web applications using Java and Angular Focus on performance and user experience throughout the development process Work closely with cross-functional teams to deliver solutions that meet project goals Contribute technical expertise to the success of ongoing and new projects Who thrives here Developers who enjoy solving technical challenges and building reliable applications Team members who collaborate well across disciplines People who value a supportive and forward-thinking workplace

Join our dynamic team at HOS247 LLC as a Senior Full-Stack Developer in a fully remote capacity. We are on the lookout for talented developers who are eager to enhance and innovate our existing suite of products. In this role, you will work closely with our Chief Technology Officer, collaborating on developing and refining solutions that drive our business forward.The ideal candidate will possess a robust background in full-stack development, with a minimum of three years of hands-on experience in Angular 2+ and Node.js.

The project involves enhancing the architecture of a system that supports clients in branches and partner locations.RESPONSIBILITIES:Participate in architectural changes to the system.Implement new functionalities using Angular 19 and Java 21.Refactor existing code for improved performance.Create integrations with REST services.Optimize performance and implement security solutions.Assist in designing and documenting technical specifications.

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.

Join our dynamic team at Alter Solutions as a Senior Java Fullstack Developer, where you will leverage your expertise in Java and full-stack development to create innovative solutions. You will work collaboratively within a talented team, contributing to both frontend and backend development, and enhancing our software architecture.

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.

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.

Join Our Growing IT Team!At Telemedi, we are in search of enthusiastic Junior Developers eager to grow their skills in the dynamic world of software development. With a strong focus on integrating AI technologies into our workflow, we encourage candidates who are ready to embrace innovation.Embrace the Future of Software DevelopmentGone are the days of traditional programming; the new era is here, and we are at the forefront of change. By leveraging the latest technologies and our commitment to excellence, we aim to build faster, better, and stronger solutions than ever before.Collaborate with Cutting-Edge ToolsOur developers work with Cursor AI (cursor.com), an innovative IDE that transforms programming paradigms. We expect you to be able to achieve in hours what others might take days to complete.What We’re Looking For:Desire to work in a product-based company where your contributions directly impact business outcomes.Ambition to grow through hands-on experience rather than just courses.Solid foundational knowledge in modern programming practices.A passion for a fast-paced environment where innovation is key.A sense of accountability for your work and that of your team.Openness to constructive feedback to improve your craft.A willingness to tackle challenges and navigate complex applications.A knack for understanding business needs and effective communication across departments.Ability to swiftly and efficiently create quality applications and features.A proactive attitude towards improving processes within your team.Your Responsibilities:Participate in the end-to-end development of IT solutions (we believe in collaborative efforts).Enhance web applications through new features, bug fixes, and refactoring.Engage in the design of new architecture and development infrastructure.Contribute to code reviews and ensure the quality of developed solutions.Consistently elevate development process standards.Work closely with the team (Developers, PMs/POs, QAs) to achieve high-quality outcomes.Maintain high programming standards and a swift delivery pace, both individually and as a team.

Welcome to the new era of software development at Telemedi! We are at the forefront of transforming the development process. By harnessing cutting-edge technologies combined with technical expertise and exceptional commitment, we strive to build more, faster, and better than ever before.Our developers utilize Cursor AI (cursor.com) — an IDE that completely changes the programming paradigm. In just a few hours, we accomplish what would take other developers several days. We expect you to do the same.Join us if:You are eager to work in a product-driven company where your contributions lead to tangible results.You thrive in a dynamic environment filled with activity.You take ownership of your work and the team’s outcomes.You embrace challenges and can navigate complex applications with ease.You enjoy understanding the business side and communicate effectively across teams.You create high-quality applications and features quickly and efficiently.You are confident in your technical skills and can enhance application standards, including improving legacy code.You are proactive in optimizing processes within your surroundings.Your responsibilities include:Participating in the development of IT solutions from start to finish (here, IT is not a “silo”).Enhancing web applications (adding new features, bug fixing, refactoring).Contributing to the design of new solutions and development infrastructure.Engaging in code reviews and ensuring the quality of created solutions.Constantly raising the standards of development processes.Collaborating closely with the team (Developers, PMs/POs, QAs).Maintaining high programming quality and a swift task delivery pace (both individually and as a team).Requirements:Experience with modern AI tools in programming (such as Cursor/Windsurf - GitHub Copilot is not sufficient). While prior experience isn't mandatory, a solid understanding and practice with the paradigm are essential.A minimum of 3 years of commercial experience working with PHP, specifically with Symfony or a similar framework.A minimum of 1 year of commercial experience with React.js framework, including some experience with TypeScript.Practical knowledge of design patterns and best programming practices (SOLID, KISS, DRY, etc.).Proficiency with version control systems, such as Git.A sense of ownership, independence, and responsibility for assigned tasks.Attention to detail and diligence in work (both individually and in a team).Fluency in Polish.Preferred qualifications:Familiarity with performance and optimization issues related to web applications.