.NET Developer

🏢 Summary: Remote Senior .NET Developer role in the banking sector focused on developing and scaling banking systems, integrating securities and banking operations, and supporting cloud-based applications. The position requires strong full-stack .NET and Angular expertise, experience with testing and event-driven systems, and familiarity with banking environments. The recruitment process includes a skills assessment and technical interview. 🗂️ Requirements: 5+ years of .NET development experience, Angular proficiency, Full-stack development experience, Hands-on code testing experience, Knowledge of SOLID principles, Experience with document-based databases, MongoDB experience, Unit testing experience, Integration testing experience, Experience with event-based messaging frameworks, Banking industry experience 📃 Skills: .NET, Angular, MongoDB, SOLID, Testing, Messaging, Cloud, Containers 🏢 Description: Work model: This is a remote opportunity within the banking sector, Start date: ASAP Rate: up to 180 zl/h under a B2B arrangement. Recruitment process : The recruitment process includes a skills assessment and a technical interview. Introduction & Summary: We are seeking a highly skilled Senior .NET Developer with a strong background in developing and extending systems for the banking industry. The ideal candidate will possess at least 7 years of experience in .NET development along with proficiency in front-end technologies, particularly Angular. This is a 100% remote position requiring a proactive approach towards scaling applications and supporting cloud-based solutions. Main Responsibilities: Develop and extend systems to support additional entities. Merge securities and banking operations seamlessly. Provide support for 17 applications including product control and risk management. Utilize in-house development frameworks. Scale systems for cloud-based operations to onboard new entities. Key Requirements: 5+ years of experience in .NET development. Proficiency in front-end technologies, specifically Angular. Full-stack development experience with hands-on code testing. Solid understanding of SOLID design principles. Experience with document-based databases. Familiarity with MongoDB. Integrated experience with unit and integration testing. Experience with event-based messaging frameworks. Background in the banking industry. Nice to Have: Advanced cloud computing skills. Experience with containerized solutions.

🏢 Summary: Long-term project for a Senior/Expert .NET Developer focused on backend and API development within enterprise banking systems. The role involves developing and optimizing software solutions, working with legacy code, and providing technical leadership and mentorship. The position emphasizes high-quality standards, collaboration, and code excellence in a complex financial environment. 🗂️ Requirements: Strong knowledge of C#, Strong knowledge of .NET framework, Expertise in ASP.NET Core, Experience in API development, Experience with SQL Server design and development, Ability to analyze and troubleshoot legacy code, Solid understanding of OOP principles, Knowledge of software engineering best practices 📃 Skills: C#, .NET, ASP.NET, SQL, T-SQL, Git, Jenkins, Angular, HTML, CSS, JavaScript, Visual Studio, Postman, Swagger, Bitbucket, Bootstrap, SQL Server 🏢 Description: We’re looking for an Expert/Senior .NET Developer to join a long-term project for a leading client in the banking industry. Project Type: Enterprise banking systems – backend & API development, code optimization, and mentorship Responsibilities: Design, develop, and maintain software solutions Analyze, refactor, and troubleshoot legacy code Conduct code reviews and uphold high-quality standards Collaborate with QA and Business Analysts Mentor junior developers and provide technical leadership Must-Have Experience: Strong knowledge of C# and the .NET framework Expertise in ASP.NET Core and API development Experience with SQL Server (design & development) Ability to work with and troubleshoot legacy code Solid understanding of OOP and software engineering best practices Nice-to-Have: Familiarity with Git, Jenkins, and testing frameworks Understanding of cloud concepts & web security best practices Knowledge of frontend technologies (Angular, HTML, CSS, JavaScript) Tools & Tech Stack:Visual Studio, Postman, Swagger, Bitbucket, SQL Server Management Studio, T-SQL, Bootstrap (or similar)

🏢 Summary: The offer is for a Senior .NET Developer with 5+ years of experience to design, develop, and maintain scalable backend applications using modern .NET technologies. The role focuses on building high-quality APIs, contributing to architectural decisions, and ensuring application reliability in cloud-based environments. It involves close collaboration with cross-functional teams and strong engagement in testing, CI/CD, and production support. 🗂️ Requirements: Minimum 5 years of experience with .NET development, Strong experience with C# and .NET Core, Solid understanding of REST APIs, Experience with Entity Framework Core, Strong knowledge of SQL, Experience with cloud platforms (Azure or AWS), Experience with CI/CD pipelines, Experience with Git version control, Experience with unit and integration testing, Experience with message broker systems, Familiarity with agile development practices 📃 Skills: C#, .NET, .NETCore, REST, EntityFramework, SQL, Azure, AWS, CI/CD, Git, UnitTesting, IntegrationTesting, MessageBroker, Angular, Docker, Kubernetes, Microservices 🏢 Description: Summary: We’re looking for a highly skilled .NET Developer with a minimum of 5 years of experience. This role focuses on solving complex problems, building high-quality software, and contributing to a collaborative engineering culture. The candidate should be passionate about clean architecture, modern .NET development, and delivering impactful solutions. Responsibilities: Analyze, design, develop, and maintain applications using .NET / .NET Core. Build scalable backend services (APIs). Collaborate with cross-functional teams (Business, Dev, Infra, etc.). Participate in code reviews to elevate engineering standards. Contribute to architectural decisions and technical roadmaps. Provide business support and monitor applications (level 2 support, incident resolution, and troubleshooting). Key Requirements: Strong experience with C# and .NET Core. Solid understanding of REST APIs, Entity Framework Core, and SQL. Familiarity with cloud platforms (Azure or AWS). Experience with CI/CD pipelines and version control (Git). Strong testing culture: unit tests, integration tests, and production validation. Familiarity with agile development practices. A mindset focused on quality, performance, and maintainability. Experience with a message broker. Nice to Have: Knowledge of microservices architecture. Experience with front-end frameworks (Angular). Background in distributed systems or high-availability environments. Knowledge of Docker & Kubernetes. Experience with Azure functions. Other Details: This position allows for flexibility and may accommodate remote work arrangements. Candidates should be prepared for collaborative team engagements with a focus on delivering high-quality software solutions.

🏢 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, 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: Offer for an experienced .NET Developer to design, develop and maintain modern banking and financial systems based on microservices architecture and Microsoft Azure cloud. The role focuses on high-quality software development using DDD and CQRS principles in Agile environments. 🗂️ Requirements: 3–4 years of commercial experience as .NET Developer, Very good knowledge of .NET Core, Experience with DDD and CQRS, Practical experience with Entity Framework, Experience with MS SQL Server and T-SQL, Knowledge of Microsoft Azure cloud services, Experience with Apache Kafka or RabbitMQ, Knowledge of design patterns and coding best practices, Experience working in Agile/Scrum, English level B2–C1 📃 Skills: .NET, .NETCore, C#, DDD, CQRS, EntityFramework, MSSQL, T-SQL, Azure, Kafka, RabbitMQ, Microservices, ASP.NET, Oracle, PostgreSQL, Angular, TypeScript, RxJS, CSS, Docker, Kubernetes, Scrum 🏢 Description: O projekcie Poszukujemy doświadczonego .NET Developera do realizacji projektów dla sektora bankowego i finansowego. Osoba na tym stanowisku będzie odpowiedzialna za projektowanie, rozwój oraz utrzymanie nowoczesnych systemów opartych o architekturę mikroserwisową i rozwiązania chmurowe. Jeżeli cenisz wysoką jakość kodu, nowoczesne podejście do tworzenia oprogramowania oraz chcesz pracować przy rozwoju systemów o kluczowym znaczeniu biznesowym – zapraszamy do aplikowania. Twój zakres obowiązków Projektowanie, rozwój i utrzymanie aplikacji opartych o platformę .NET Tworzenie i rozwijanie rozwiązań zgodnych z zasadami DDD oraz CQRS Implementacja i rozwój usług oraz integracji systemowych Projektowanie i optymalizacja baz danych Współpraca z zespołami analitycznymi, testerskimi oraz DevOps Tworzenie dokumentacji technicznej Udział w code review oraz dbanie o wysoką jakość dostarczanego oprogramowania Współpraca w środowisku Agile/Scrum Nasze wymagania Minimum 3–4 lata doświadczenia komercyjnego na stanowisku .NET Developer Bardzo dobra znajomość .NET Core Doświadczenie w projektowaniu aplikacji zgodnie z podejściem DDD (Domain-Driven Design) oraz CQRS Praktyczna znajomość Entity Framework Doświadczenie w pracy z MS SQL Server oraz T-SQL Znajomość usług chmurowych Microsoft Azure Doświadczenie w integracji systemów z wykorzystaniem Apache Kafka i/lub RabbitMQ Znajomość dobrych praktyk programistycznych oraz wzorców projektowych Umiejętność pracy zespołowej i samodzielnego rozwiązywania problemów Znajomość języka angielskiego na poziomie B2–C1 Mile widziane Doświadczenie w pracy z ASP.NET MVC Znajomość baz danych Oracle oraz PostgreSQL Doświadczenie frontendowe z Angular Znajomość TypeScript, RxJS oraz CSS Doświadczenie w pracy z Docker Znajomość Kubernetes Doświadczenie w projektach dla sektora bankowego lub finansowego Znajomość architektury mikroserwisowej i systemów rozproszonych Oferujemy Udział w zaawansowanych projektach dla sektora bankowego i finansowego Możliwość pracy zdalnej lub hybrydowej Elastyczne godziny pracy Stabilną współpracę przy długoterminowych projektach Możliwość rozwoju kompetencji w obszarze architektury systemów, chmury i nowoczesnych technologii .NET Dostęp do nowoczesnych narzędzi i technologii Współpracę z doświadczonym zespołem ekspertów IT Atrakcyjne wynagrodzenie adekwatne do doświadczenia i kompetencji Jeżeli chcesz rozwijać nowoczesne rozwiązania technologiczne, pracować z architekturą opartą o DDD, CQRS i chmurę Azure oraz realizować projekty o dużej skali biznesowej – zapraszamy do aplikowania.

🏢 Summary: The offer is for a Senior .NET Developer responsible for improving and refactoring core backend systems to enhance structure, maintainability, and security. The role focuses on reducing technical debt, enabling automation and AI integration, and ensuring high code quality through testing and CI/CD practices. The position involves hands-on development within legacy or monolithic environments and driving system modernization. 🗂️ Requirements: 5+ years experience in .NET / C# backend development, Experience with legacy or monolithic systems, Strong knowledge of clean code principles, Proven experience in refactoring existing codebases, Strong SQL and backend integration experience, Experience with APIs and service-based architecture, Experience with CI/CD pipelines, Experience with automated testing, Familiarity with TDD or BDD practices, Experience with Gherkin, SpecFlow, Cucumber or similar, Experience using AI tools in development workflows, Understanding of code structuring for automation and AI integration 📃 Skills: .NET, C#, SQL, APIs, CI/CD, TDD, BDD, Gherkin, SpecFlow, Cucumber, AI, Git, Docker, .NETCore 🏢 Description: Introduction & Summary: We are seeking a Senior .NET Developer with 5-8+ years of experience in backend development and .NET engineering. The successful candidate will drive improvement in code quality, reduce technical debt, and support system structuring for better predictability. With a focus on future automation and AI capabilities, you will help ensure code understandability, maintainability, and security. Main Responsibilities: Responsible for hands-on development and refactoring of core systems, with the aim of enhancing their structure and predictability. Develop and improve .NET-based systems. Reduce technical debt and increase maintainability. Support safe and efficient delivery. Ensure code is understandable, maintainable, and secure. Make systems testable and observable. Facilitate automation of workflows. Key Requirements: Strong experience with .NET / C#. Experience working with legacy or monolithic systems. Strong understanding of clean code principles. Experience with refactoring and improving existing codebases. Strong SQL and backend integration experience. Experience with APIs and service-based architecture. Experience with CI/CD pipelines. Experience with automated testing. Familiarity with TDD / BDD and security by design thinking. Experience with Gherkin / SpecFlow / Cucumber or similar. AI-related: Experience using AI tools in development workflows. Understanding of code structuring for automation and AI integration. Experience using AI for debugging, testing, or documentation support. Nice to Have: Experience with .NET Core. Experience with containerization. Exposure to AI-assisted testing or development tools. Experience improving system observability.

🏢 Summary: Senior .NET Developer role focused on transforming a data-intensive analytical platform for the cloud. The position involves scalable architecture design, legacy modernization, SOA-based development, user support, and close collaboration with engineering, analysis, and QA teams. 🗂️ Requirements: 5+ years of .NET software development experience, Web services design and implementation expertise, AWS and cloud environment experience, Redux and Context API mastery in React applications, Software design principles and best practices, Advanced English 📃 Skills: .NET, AWS, React, Redux, Context, SOA, Webservices 🏢 Description: We are looking for a Senior .NET Developer to contribute to the cloud transformation of a data-intensive analytical platform. In this role, you will collaborate with innovative and diverse professionals from around the world, designing scalable architectures and modernizing legacy components to ensure performance and reliability. Tasks - Contribute to the cloud transformation of a data-intensive analytical platform by designing scalable architectures and modernizing legacy components - Ensure the product’s continuous technological evolution by proposing and implementing modern frameworks and architectural improvements - Apply Service Oriented Architecture (SOA) concepts in software design and development - Provide timely and courteous support to platform users, ensuring issues are understood, analyzed, and resolved promptly - Collaborate closely with software engineers, analysts, and quality engineers to design and build software solutions that meet business needs - Adhere to team design and coding procedures and standards Requirements - Minimum 5 years of software development experience with a strong focus on .NET technologies - Deep expertise in designing and implementing web services - Practical experience with AWS and cloud environments - Hands-on mastery of Redux and Context API in React applications - Strong understanding of software design principles and best practices - Advanced level of English Nice-to-have requirements - Experience with C#

🏢 Summary: Senior .NET Developer role focused on building and enhancing a custom industrial application supporting end-to-end production and logistics processes. The position involves backend development in .NET, frontend development with Angular, and designing microservices-based solutions deployed in AWS. The project emphasizes scalability, traceability, and continuous product improvement. 🗂️ Requirements: Minimum 5 years of commercial experience as a .NET Developer, Strong hands-on experience with .NET in backend development, Practical experience with Angular in frontend development, Experience with microservices-based architecture, Experience with AWS cloud services 📃 Skills: .NET, Angular, AWS, Microservices 🏢 Description: We are looking for a Senior .NET Developer to join a long‑term product development project in the industrial and manufacturing domain. The role focuses on building and maintaining a custom‑built application that supports end‑to‑end production and logistics processes for industrial clients. The project uses modern technologies and follows an innovation‑driven approach, with strong emphasis on process traceability, scalability, and continuous improvement. Your tasks Develop and maintain backend solutions using .NET for a custom industrial application Implement new product functionalities according to business and process requirements Build and extend frontend features using Angular Design and develop solutions based on a microservices architecture Develop, deploy, and maintain solutions in an AWS cloud environment Requirements Minimum 5 years of commercial experience as a .NET Developer Strong hands‑on experience with .NET in backend development Practical experience with Angular in frontend development Experience working with microservices‑based architectures Experience working with AWS cloud services Fluency in English Residing in Poland required

🏢 Summary: Senior .NET Developer role focused on building and maintaining secure, high-performance online banking solutions in a hybrid work model. The position involves developing new backend features, optimizing databases, and managing containerized applications in an Agile, distributed environment. The role also includes ensuring code quality, supporting production systems, and contributing to secure payment functionalities. 🗂️ Requirements: Minimum 4 years of experience in IT systems development, Strong hands-on experience with .NET, Strong knowledge of PostgreSQL, Strong knowledge of MS SQL, Experience with Docker, Experience with Kubernetes, Practical understanding of Agile methodology, Ability to develop new features and maintain existing systems, Ability to work independently in distributed teams 📃 Skills: .NET, C#, PostgreSQL, MS SQL, SQL, Docker, Kubernetes, Agile, Elixir, Sorbnet 🏢 Description: Innovate online banking and join the team as a Senior .NET Developer! Warsaw-based opportunity with hybrid work model (2 times in the office/month). As a Senior .NET Developer , you will be working for our client, one of the leaders in online banking, supporting the development and maintenance of secure, high-performance financial solutions. You’ll be contributing to a team responsible for building and enhancing banking functionalities, ensuring reliability and innovation. Working in a distributed Agile environment, you’ll play a key role in both implementing complex backend logic and actively collaborating with cross-functional teams. Your main responsibilities: Design and develop new features in .NET 8 Implement and optimize SQL-based data access Build and maintain containerized applications using Docker and Kubernetes Collaborate with distributed teams in an Agile environment Participate in the development of secure payment solutions Share knowledge and support less experienced team members Ensure code quality through code reviews and testing Maintain existing functionalities and resolve production issues Manage your own time and responsibilities while working remotely You're ideal for this role if you have: Strong experience in developing IT systems (min. 4 years of experience) Solid hands-on experience with .NET Strong knowledge of PostgreSQL and MS SQL Practical understanding of Agile software development Excellent communication and collaboration skills in distributed teams Ability to work independently and manage your time effectively Experience in developing new features and maintaining existing ones A passion for software development and continuous learning Experience with Docker and Kubernetes Nice to have: Knowledge of banking domain such as payments and transactions (e.g. Elixir, Sorbnet)