.NET Developer

🏢 Summary: 100% remote B2B opportunity to lead a development team in building and maintaining scalable applications within an agile environment. The role combines hands-on full-stack development with strategic technical leadership, focusing on robust system architecture and faster delivery of new solutions. Long-term cooperation with a two-stage recruitment process including a technical test. 🗂️ Requirements: Proficiency in .NET, Proficiency in C#, Experience in full-stack development, Experience with front-end technologies, Experience with document-based databases, Knowledge of event-based messaging frameworks, Experience with cloud services, Experience with containerization, Ability to lead development teams, Experience working in agile environment 📃 Skills: .NET, C#, Angular, MongoDB, Cloud, Docker, Microservices, REST, Git 🏢 Description: Work model: 100% remote Start date: Flexible Rate: up to 215 PLN/h netto + VAT Contract : B2B, long-term cooperation (12-month contract up front + extensions) Recruitment process : 2 stages, including a technical test estimated to take 2-4 hours. Summary: The role focuses on leading the development team to create new solutions and maintain systems within an agile environment, emphasizing the importance of robust applications and strategic direction. Main Responsibilities: Lead the development team in creating and maintaining applications. Adopt wider technology practices and address the speed of new application delivery. Engage in hands-on development while guiding the strategic direction of projects. Collaborate with teams to gather specifications and perform technical analysis. Navigate complex systems and ensure they are built to scale. Manage developer quality and capacity amidst organizational constraints. Key Requirements: Proficient in .NET and C#. Experience with full-stack development, including front-end technologies. Familiarity with document-based databases. Knowledge of event-based messaging frameworks. Experience with cloud services and containerization. Nice to Have: Prior experience in the banking or financial services sector. Familiarity with Angular or other modern front-end frameworks. Experience with MongoDB or similar environments. Other Details: Environment: .NET, C#, Angular, MongoDB, moving towards cloud solutions. Team Structure: Full Stack Developers working closely with Business Analysts.

🏢 Summary: Long-term fully remote B2B contract for a .NET Developer focused on maintaining and developing applications based on .NET Framework 4.7 and WinForms. The role involves designing, optimizing, deploying, and supporting software solutions in production environments. The position emphasizes system improvement, code quality, and close collaboration within cross-functional teams. 🗂️ Requirements: Experience with .NET Framework (preferably 4.7), Experience with WinForms, Strong knowledge of SQL, Strong knowledge of Entity Framework, Experience in application deployment, Experience in production support, Ability to maintain and optimize existing systems, Experience in code refactoring and code quality improvement, Experience with technical documentation, Familiarity with Jira or similar issue-tracking tools, Strong debugging skills 📃 Skills: .NET, WinForms, SQL, EntityFramework, Jira, Debugging, Refactoring 🏢 Description: We are looking for a .NET Developer : Key Details: Long-term B2B contract (140–170 PLN/hour) Fully remote work Tech stack: .NET Framework (mainly 4.7), WinForms, SQL, Entity Framework Requirements: Experience with .NET Framework (preferably version 4.7) and WinForms Strong knowledge of SQL and Entity Framework Ability to design and develop software solutions aligned with user needs Experience with deploying applications and supporting them in production environments Skills in maintaining, improving, and optimizing existing systems (performance, security, functionality) Ability to collaborate effectively with cross-functional teams (engineers, designers, analysts, Product Managers) Experience in writing and maintaining technical documentation Familiarity with Jira or similar tools for tracking issues and feedback Experience with refactoring code and improving code quality Willingness to share knowledge and support team development Strong debugging and problem-solving skills to ensure application stability and reliability

🏢 Summary: Long-term remote B2B contract for a technical leader responsible for guiding a development team in building and maintaining scalable applications within an agile environment. The role combines hands-on .NET development with strategic oversight, technical analysis, and quality management. Focus is on delivering robust, cloud-oriented solutions and improving application delivery speed. 🗂️ Requirements: Proficiency in .NET and C#, Experience in full-stack development, Experience with front-end technologies, Experience with document-based databases, Knowledge of event-based messaging frameworks, Experience with cloud services, Experience with containerization, Ability to lead development team, Experience in building scalable systems 📃 Skills: .NET, C#, Angular, MongoDB, Cloud, Docker, Messaging, SQL 🏢 Description: Work model: 100% remote Start date: 30.06.2026 Rate: 160-180 PLN/h netto + VAT Contract : B2B, long-term cooperation (12-month contract up front + extensions) Recruitment process : 2 stages, including a technical test estimated to take 2-4 hours. Summary: The role focuses on leading the development team to create new solutions and maintain systems within an agile environment, emphasizing the importance of robust applications and strategic direction. Main Responsibilities: Lead the development team in creating and maintaining applications. Adopt wider technology practices and address the speed of new application delivery. Engage in hands-on development while guiding the strategic direction of projects. Collaborate with teams to gather specifications and perform technical analysis. Navigate complex systems and ensure they are built to scale. Manage developer quality and capacity amidst organizational constraints. Key Requirements: Proficient in .NET and C#. Experience with full-stack development, including front-end technologies. Familiarity with document-based databases. Knowledge of event-based messaging frameworks. Experience with cloud services and containerization. Nice to Have: Prior experience in the banking or financial services sector. Familiarity with Angular or other modern front-end frameworks. Experience with MongoDB or similar environments. Other Details: Environment: .NET, C#, Angular, MongoDB, moving towards cloud solutions. Team Structure: Full Stack Developers working closely with Business Analysts.

🏢 Summary: Technical leadership role focused on driving the development and maintenance of scalable .NET-based applications in an agile environment. The position combines hands-on full-stack development with strategic oversight of architecture, quality, and delivery speed. It involves close collaboration with cross-functional teams to build robust, cloud-oriented solutions. 🗂️ Requirements: Proficiency in .NET and C#, Experience in full-stack development, Knowledge of front-end technologies, Experience with document-based databases, Knowledge of event-based messaging frameworks, Experience with cloud services, Experience with containerization, Ability to design scalable systems, Experience leading development teams 📃 Skills: .NET, C#, Angular, MongoDB, Cloud, Docker, Kubernetes, Microservices, REST, Git 🏢 Description: Work model: 100% remote Start date: 30.06.2026 Rate: 160-180 PLN/h netto + VAT Contract : B2B, long-term cooperation (12-month contract up front + extensions) Recruitment process : 2 stages, including a technical test estimated to take 2-4 hours. Summary: The role focuses on leading the development team to create new solutions and maintain systems within an agile environment, emphasizing the importance of robust applications and strategic direction. Main Responsibilities: Lead the development team in creating and maintaining applications. Adopt wider technology practices and address the speed of new application delivery. Engage in hands-on development while guiding the strategic direction of projects. Collaborate with teams to gather specifications and perform technical analysis. Navigate complex systems and ensure they are built to scale. Manage developer quality and capacity amidst organizational constraints. Key Requirements: Proficient in .NET and C#. Experience with full-stack development, including front-end technologies. Familiarity with document-based databases. Knowledge of event-based messaging frameworks. Experience with cloud services and containerization. Nice to Have: Prior experience in the banking or financial services sector. Familiarity with Angular or other modern front-end frameworks. Experience with MongoDB or similar environments. Other Details: Environment: .NET, C#, Angular, MongoDB, moving towards cloud solutions. Team Structure: Full Stack Developers working closely with Business Analysts.

🏢 Summary: B2B contract for an experienced .NET Developer in the banking sector, working mostly remotely with occasional office presence in Warsaw. The role involves designing and implementing web-based systems using Microsoft technologies and Oracle, with active participation in testing and technical documentation. The position requires strong experience in enterprise-level financial systems and high-quality code practices. 🗂️ Requirements: Minimum 3 years of experience in C# and .NET (including 4.5), Experience with WCF, Experience with SQL and SSIS, Experience with MVC.NET, Experience with HTML5 and CSS3, Experience with JavaScript, jQuery, jQuery UI, Experience with Visual Studio 2013, Experience in web application development, Knowledge of OOP principles and design patterns, Experience with unit testing and test automation, Experience in systems design for financial institutions, Ability to work with technical documentation in English 📃 Skills: C#, .NET, WCF, SQL, SSIS, HTML5, CSS3, JavaScript, jQuery, jQueryUI, MVC, VisualStudio, OOP, DesignPatterns, Oracle, UnitTesting, Automation, Web, English 🏢 Description: umowa: B2B stawka: 120 zł/h + VAT tryb: 1 raz na 2 tygodnie z biura, Warszawa branża: bankowość Poszukujemy doświadczonego Programisty .NET, który dołączy do naszego zespołu. Kandydat powinien posiadać minimum 3-letnie doświadczenie w realizacji projektów informatycznych oraz solidną znajomość technologii takich jak C#, .NET, WCF, SQL i HTML. Zakres obowiązków: prowadzenie prac projektowych i implementacyjnych w systemach informatycznych opartych o technologie Oracle, współpraca z użytkownikami końcowymi przy zbieraniu i analizie wymagań, czynny udział w testach wewnętrznych oprogramowania, tworzenie i aktualizacja dokumentacji technicznej i funkcjonalnej, współpraca w opracowywaniu nowych rozwiązań, wdrażanie działań dotyczących poprawy jakości danych w systemach. wsparcie w opiniowaniu specyfikacji technicznej oraz dokumentacji projektowej. Wymagania kluczowe: minimum 3-letnie doświadczenie programistyczne w technologiach C#, .NET (w tym w wersji 4.5), WCF, SQL, SQL Server Integration Services, HTML, MVC.NET, znajomość Javascript, jQuery, jQuery UI, HTML (w tym w wersji 5.0)/CSS (w tym w wersji 3.0), znajomość Visual Studio Ultimate 2013, znajomość testowania modułowego oraz automatyzacji testów, doświadczenie w tworzeniu aplikacji webowych, znajomość wzorców projektowych oraz zasad OOP, praktyczne doświadczenie z zakresu projektowania systemów dla instytucji finansowych, wysoka samodzielność oraz umiejętność pracy w zespole. bardzo dobra organizacja pracy oraz komunikatywność, znajomość angielskiego umożliwiająca pracę z dokumentacją techniczną. Mile widziane: znajomość podstaw UX design, znajomość metodologii AGILE oraz XP, znajomość języka PL/SQL oraz bazy danych Oracle, praktyczna znajomość narzędzi typu CASE, doświadczenie w pracy w strukturze macierzowej, znajomość ITIL, znajomość Docker i Kubernetes.

🏢 Summary: B2B contract for an experienced .NET Developer in the banking sector, working in a hybrid model with focus on building and testing modern microservice-based systems. The role centers on advanced C# and .NET 8 development, system design, and CI/CD processes within enterprise environments. 🗂️ Requirements: Advanced knowledge of C# and .NET 8, 3–5 years of commercial experience in IT, Experience in microservices development, Experience with unit testing and test automation, Knowledge of CI/CD processes, Experience with Azure DevOps, TeamCity or Jenkins, Experience with Microsoft SQL Server Integration Services, Ability to perform requirements analysis, Knowledge of system design methods, Practical experience with Visual Studio and Git 📃 Skills: C#, NET, NET8, SQL, SSIS, Microservices, CICD, AzureDevOps, TeamCity, Jenkins, VisualStudio, Git, MicrosoftSQLServer, UnitTesting, TestAutomation, AI 🏢 Description: Informacje o projekcie: Branża: bankowość Stawka: ~125 zł/h netto + VAT, B2B Lokalizacja: hybryda 1 x 2 tygodnie Łódź Wprowadzenie i Podsumowanie: Poszukujemy doświadczonego Programisty .NET, który posiada zaawansowaną znajomość języka C# oraz technologii .NET. Idealny kandydat powinien wykazać się umiejętnościami w zakresie testowania, analizy wymagań oraz projektowania systemów. Doświadczenie w branży IT na poziomie 3-5 lat oraz znajomość narzędzi takich jak Visual Studio i Git są niezwykle istotne. Główne obowiązki: Umiejętność programowania w C# - .NET 8.0. Dodatkowa znajomość języków i technologii, takich jak SQL, node.js, react, typescript będzie atutem. Doświadczenie w programowaniu mikroserwisów . Znajomość procesów CI/CD (Azure DevOps, TeamCity, Jenkins). Przygotowywanie testów, aby zapewnić niezawodność oprogramowania. Współpraca z narzędziami AI. Dobre umiejętności analityczne potrzebne do analizowania zadań i proponowania kompleksowych rozwiązań. Wymagania kluczowe: Zaawansowana znajomość programowania w .NET. Dosiadczenie w Clean Code, Clean Architecture. Doświadczenie praktyczne z DDD. Doświadczenie z Microservisami. Pożądana znajomość Kafka. Doświadczenie w pracy z nowoczesnymi środowiskoami (brak legacy). Doświadczenie w testowaniu modułowym i automatyzacji testów. Znajomość metod projektowania systemów. Doświadczenie z Microsoft SQL Server Integration Services. Znajomość języka angielskiego umożliwiająca zrozumienie dokumentacji technicznej. Doświadczenie zawodowe w branży IT: 3-5 lat. Mile widziane: Certyfikaty takie jak MCTS: .NET Framework 4.0, ASP.NET Applications. Potwierdzenie umiejętności programowania testami kompetencji.

🏢 Summary: Offer for an experienced .NET Developer in the banking sector to design and implement full-stack applications across database, backend, and web layers, with strong focus on modern .NET and Angular technologies. The role involves participation in testing, deployments, and collaboration on requirements analysis. Mostly remote work with occasional on-site presence in Warsaw. 🗂️ Requirements: 3–5 years of experience in C# programming, Commercial experience with .NET 6/8 and .NET Framework 4.6/4.8, Experience with Entity Framework, Experience with Angular 14+, Knowledge of TypeScript, HTML, CSS, JavaScript, Experience with T-SQL and SQL Server 2016/2022, Knowledge of Docker, Experience with REST API implementation, Experience in building web applications, Ability to implement unit tests, Ability to implement E2E tests, Very good knowledge of OOP and SOLID principles, Experience in Code Review process, Experience with Visual Studio 2019+, English proficiency for working with technical documentation 📃 Skills: C#, .NET, .NETFramework, EntityFramework, Angular, TypeScript, HTML, CSS, JavaScript, T-SQL, SQLServer, Docker, REST, OOP, SOLID, VisualStudio 🏢 Description: Branża: bankowość Stawka: 125 zł/h na b2b Lokalizacja: Głównie praca zdalna, 2 razy w miesiącu praca z biura w Warszawie Wprowadzenie i Podsumowanie Poszukujemy doświadczonego Programisty .NET, który będzie odpowiedzialny za projektowanie, implementację oraz zarządzanie aplikacjami w pełnym zakresie architektury systemu. Wymagana jest wiedza w zakresie technologii C#, .NET 6/8 oraz narzędzi frontendowych takich jak Angular, HTML i JavaScript. Kandydat powinien mieć minimum 3-5-letnie doświadczenie w branży oraz umiejętności związane z bazami danych oraz kontenerami. Zakres obowiązków: Projektowanie i implementacja aplikacji obejmujące wszystkie warstwy architektury systemu: warstwę bazodanową, backend oraz interfejs webowy Udział w testach wewnętrznych oprogramowania Współpraca z analitykami i użytkownikami biznesowymi przy zbieraniu oraz analizie wymagań dotyczących nowych i istniejących funkcjonalności Tworzenie oraz aktualizacja dokumentacji technicznej i funkcjonalnej systemu Udział w procesie wdrażania zmian na środowisko produkcyjne Wymagania Must Have: 3–5 lat doświadczenia w programowaniu w obszarze technologii: C# .NET 6/8 .NET Framework 4.6/4.8 Entity Framework Angular 14+, TypeScript, HTML, CSS, JavaScript T-SQL (SQL Server 2016/2022) Znajomość technologii Docker Dodatkowe Must Have: Praktyczna znajomość środowiska Visual Studio 2019+ Doświadczenie w implementacji REST API oraz aplikacji webowych Umiejętność implementacji testów jednostkowych (backend/web) Umiejętność implementacji testów E2E Bardzo dobra znajomość OOP oraz SOLID Doświadczenie w aktywnym procesie Code Review Umiejętność analizy wymagań biznesowych i systemowych Analityczne myślenie, precyzyjne formułowanie wypowiedzi Wysoka samodzielność i odpowiedzialność za realizowane zadania Znajomość języka angielskiego umożliwiająca pracę z dokumentacją techniczną Mile widziane: Doświadczenie w projektowaniu i programowaniu systemów dla sektora finansowego Umiejętność implementacji skryptów na potrzeby testów wydajnościowych

🏢 Summary: Senior .NET Developer role focused on designing, extending, and modernising critical banking and securities systems in a fully remote B2B model. The position involves full-stack development, system integration, and cloud scaling within distributed, business-critical environments. The role requires close collaboration with business stakeholders and ownership of end-to-end application delivery. 🗂️ Requirements: 5+ years experience as .NET / C# Developer, Experience in banking or investment banking sector, Full-stack development experience, Knowledge of SOLID design principles, Experience with document-based databases, Experience with event-driven messaging frameworks, Experience with unit and integration testing, End-to-end application development experience, Ability to work during UK business hours, Based in Poland 📃 Skills: .NET, C#, MongoDB, SOLID, Messaging, UnitTesting, IntegrationTesting, Docker, Kubernetes, Cloud 🏢 Description: Work model: 100% remote (candidates must be based in Poland) Contract type: B2B Industry: Banking / Investment Banking We are looking for an experienced Senior .NET Developer to join a distributed engineering team working on critical banking systems. The role focuses on extending and modernising applications used across securities and banking operations, with a strong emphasis on system design, scalability, and cloud transformation. You will work end-to-end on business-critical systems, closely collaborating with Business Analysts, without a separate QA team. A solid background in banking or financial services is essential. Main Responsibilities: Design, develop, and extend .NET-based systems supporting multiple banking entities Contribute to the integration of securities and core banking platforms Support and enhance a portfolio of ~17 applications across product control and risk management Work with an in-house development framework in a full-stack capacity Participate in scaling applications for cloud-based, containerized environments Collaborate closely with business stakeholders to deliver robust solutions Ensure high code quality through unit and integration testing Key Requirements: 5+ years of professional experience as a .NET / C# Developer Hands-on experience in the banking or investment banking sector (mandatory) Full-stack development experience (backend-focused, frontend included) Strong understanding and practical application of SOLID design principles Experience with document-based databases (e.g. MongoDB) Experience with event-driven / event-based messaging frameworks Solid knowledge of unit and integration testing Experience working end-to-end on applications (development, testing, support) Ability to work independently in a fast-paced, regulated environment Availability during UK business hours Nice to Have: Experience with cloud platforms and application migration to cloud Experience with container technologies (e.g. Docker, Kubernetes) Exposure to systems such as Murex or large in-house banking platforms Background in securities, risk, or product control systems Other Details: This role is 100% remote with candidates required to be located in Poland. The contract is on a B2B basis within the banking and investment banking industry.

🏢 Summary: Senior .NET Developer role focused on designing, extending, and modernizing critical banking systems within securities and core banking domains. The position involves full-stack development, system integration, and cloud scaling in a distributed team without a separate QA function. Work includes end-to-end ownership of business-critical applications in a regulated investment banking environment. 🗂️ Requirements: 5+ years experience with .NET and C#, Hands-on experience in banking or investment banking, Full-stack development experience, Strong knowledge of SOLID principles, Experience with document-based databases, Experience with event-driven messaging frameworks, Knowledge of unit and integration testing, End-to-end application development experience, Ability to work independently in regulated environments, Availability during UK business hours, Poland-based residency 📃 Skills: .NET, C#, MongoDB, SQL, REST, Microservices, Docker, Kubernetes, Azure, UnitTesting, IntegrationTesting, EventDriven, Git 🏢 Description: Work model: 100% remote (candidates must be based in Poland) Contract type: B2B Industry: Banking / Investment Banking We are looking for an experienced Senior .NET Developer to join a distributed engineering team working on critical banking systems. The role focuses on extending and modernising applications used across securities and banking operations, with a strong emphasis on system design, scalability, and cloud transformation. You will work end-to-end on business-critical systems, closely collaborating with Business Analysts, without a separate QA team. A solid background in banking or financial services is essential. Main Responsibilities: Design, develop, and extend .NET-based systems supporting multiple banking entities Contribute to the integration of securities and core banking platforms Support and enhance a portfolio of ~17 applications across product control and risk management Work with an in-house development framework in a full-stack capacity Participate in scaling applications for cloud-based, containerized environments Collaborate closely with business stakeholders to deliver robust solutions Ensure high code quality through unit and integration testing Key Requirements: 5+ years of professional experience as a .NET / C# Developer Hands-on experience in the banking or investment banking sector (mandatory) Full-stack development experience (backend-focused, frontend included) Strong understanding and practical application of SOLID design principles Experience with document-based databases (e.g. MongoDB) Experience with event-driven / event-based messaging frameworks Solid knowledge of unit and integration testing Experience working end-to-end on applications (development, testing, support) Ability to work independently in a fast-paced, regulated environment Availability during UK business hours Nice to Have: Experience with cloud platforms and application migration to cloud Experience with container technologies (e.g. Docker, Kubernetes) Exposure to systems such as Murex or large in-house banking platforms Background in securities, risk, or product control systems Other Details: This role is 100% remote with candidates required to be located in Poland. The contract is on a B2B basis within the banking and investment banking industry.

🏢 Summary: Senior .NET Developer role focused on designing, developing, and maintaining .NET-based applications in a long-term B2B contract. The position involves system design, unit testing, test automation, and collaboration in Agile teams, with partial on-site presence in Łódź. The role requires strong experience with modern development tools and large language models (LLM). 🗂️ Requirements: 5+ years of commercial experience in software development, Advanced knowledge of .NET, Experience with LLM models, Experience with React or Angular, Experience with MSSQL, Proficiency with Visual Studio, Proficiency with Git, Experience with JIRA, Experience with MSBuild, Experience with TeamCity, Experience with PowerShell, Ability to create unit tests and test automation, Experience working in Agile methodologies, English sufficient to understand technical documentation 📃 Skills: .NET, C#, React, Angular, MSSQL, VisualStudio, Git, JIRA, MSBuild, TeamCity, PowerShell, LLM, Agile 🏢 Description: Hello :) Poszukujemy doświadczonego Programisty .NET na poziomie seniorskim, który posiada zaawansowaną znajomość technologii .NET. Idealny kandydat ma doświadczenie w realizacji projektów informatycznych oraz umiejętność pracy zarówno w zespole, jak i samodzielnie. What we offer: Long Term B2B Contract Stawka: 140 PLN/ H + VAT Remote ( wizyta 2 razy na miesiąc biura w Lodzi) Główne obowiązki: Tworzenie i rozwijanie aplikacji opartych na .NET. Testowanie modułowe oraz automatyzacja testów. Analiza wymagań użytkowników oraz projektowanie systemów. Współpraca z zespołem w metodach Agile. Utrzymywanie dokumentacji projektowej. Wykorzystywanie narzędzi takich jak Visual Studio i Git. Wymagania kluczowe: Umiejętność pracy z modelami językowymi LLM. Bardzo dobra znajomość technologii .NET. Doświadczenie w pracy w zespole oraz samodzielnej. Dobra znajomość React/Angular. Doświadczenie 5+ lat w branży. Znajomość narzędzi MSSQL, Visual Studio, Git, JIRA, Msbuild, TeamCity, PowerShell. Znajomość języka angielskiego na poziomie umożliwiającym zrozumienie dokumentacji technicznej. Umiejętności mile widziane: Potwierdzenie umiejętności programowania testami kompetencji. Certyfikaty: MCTS: .NET Framework 4.0, ASP.NET Applications.