Full Stack .NET Developer

🏢 Summary: Full-Stack Developer role focused on building and maintaining scalable server-side applications and responsive front-end interfaces using modern technologies. The position involves working with cloud and containerized environments, optimizing SQL Server databases, and contributing to architectural decisions. The role requires close collaboration with cross-functional teams to deliver high-quality software solutions. 🗂️ Requirements: 6+ years of full-stack application development experience, Proficiency in React, Proficiency in C#, Proficiency in ASP.NET, Proficiency in SQL, Experience with SQL Server and T-SQL, Ability to design and maintain server-side applications, Ability to develop responsive front-end interfaces 📃 Skills: C#, ASP.NET, .NET, React, AngularJS, Node.js, SQL, SQLServer, T-SQL, Cloud, Containers, Streaming 🏢 Description: Full-Stack Developer What you’ll do Design, develop, and maintain server-side applications using modern technologies such as C#/.NET and Node.js. Create and enhance responsive front-end interfaces with ReactJS and AngularJS. Optimize and manage SQL Server databases, writing efficient T-SQL procedures. Utilize cloud, containerization, and streaming technologies to build scalable and reliable systems. Contribute to architectural discussions and technical design decisions. Work closely with cross-functional teams to deliver high-quality software solutions. What’s required 6+ years of experience in full-stack application development. Proficiency in React, C#, ASP.NET , and SQL. Strong analytical and problem-solving skills with a focus on delivering robust solutions. Excellent attention to detail and commitment to quality. Effective communication and teamwork skills. High ethical standards and professionalism. Nice to have Experience with Node.js.

🏢 Summary: Full-Stack Developer role focused on building and enhancing business applications using C#/.NET on the backend and React (18+) on the frontend. The position involves developing new features, maintaining and improving legacy code, and contributing to solution design within an Agile/Scrum team. Strong emphasis on backend expertise, frontend development, and architectural best practices. 🗂️ Requirements: 5+ years of experience with .NET and C#, 3+ years of experience with React (18+), Strong knowledge of .NET Framework, .NET Standard, .NET Core/.NET, Experience with debugging, profiling and performance analysis, Understanding of DDD, Clean Code and SOLID principles, Knowledge of architectural patterns and asynchronous communication, Good command of T-SQL, Experience with SQL Server Management Studio (SSMS), Experience with Visual Studio 📃 Skills: C#, .NET, React, TSQL, SQLServer, SSMS, VisualStudio, DDD, SOLID, CleanCode, Scrum, Debugging, Profiling, Architecture, Asynchronous 🏢 Description: We’re looking for an experienced Full-Stack Developer to build and evolve business applications using C#/.NET on the backend and React on the frontend. You’ll work closely with a cross-functional team (QA, Analysts, Product Owner) in an Agile/Scrum environment, contributing to both new development and improvements to existing (including legacy) codebases. Key responsibilities: Develop software in C# based on functional and technical documentation Build and maintain the frontend using React (18+) Analyse and improve existing code, including legacy components Contribute to solution design and architecture Collaborate daily with developers, testers, analysts and the Product Owner in Scrum Requirements: 5+ years of experience building applications with .NET / C# 3+ years of experience building applications with React Strong knowledge of C# (.NET Framework, .NET Standard, .NET Core/.NET) React experience with modern versions (React 18+) Practical skills in debugging, profiling and performance analysis Understanding of DDD, Clean Code, SOLID Knowledge of architectural patterns and asynchronous communication Good command of T-SQL and SQL Server Management Studio (SSMS) Experience working with Visual Studio Nice to have Experience building views/UI for mobile applications Background in projects for the financial sector Test automation experience (e.g., Postman, Playwright) Familiarity with WCAG accessibility standards

🏢 Summary: Remote .NET Full-stack Developer role in a fintech and investment management environment focused on OMS/EMS platforms, trade lifecycle workflows, and enterprise engineering systems. The position involves backend development with C# and .NET, frontend development with React, and database optimisation with MS SQL Server. Candidates should have strong fintech or enterprise software experience and excellent English communication skills. 🗂️ Requirements: Strong experience with C#, Strong experience with .NET, Strong experience with React, Experience with MS SQL Server, Schema design, Query optimisation, Experience with APIs, Experience with integrations, Experience with complex backend systems, Background in enterprise-level or fintech software development, Very good English communication, Flexibility across technical tasks and team needs 📃 Skills: C#, .NET, React, SQL, MSSQL, API, CI/CD, Docker, Azure, AWS 🏢 Description: Project/Client: Fintech / Investment Management Location: EU Start Date: ASAP Duration: Until EOY Language: English Role Overview: We are looking for a .NET (Full-stack) Developer to join a remote team working on critical fintech systems in an investment management environment. The role focuses on Order Management Systems , Execution Management Systems , trade lifecycle workflows, and internal engineering platforms. The position requires strong experience with C# , .NET , React , and MS SQL Server , with an emphasis on reliability, correctness, and clear communication in English . Key Responsibilities: Develop and maintain backend services using C# and .NET Build and maintain frontend functionality using React Work on critical OMS and EMS platforms supporting order lifecycle, routing, execution, allocations, and auditability Design and optimise database schemas and queries using MS SQL Server Contribute to APIs, integrations, and enterprise-grade distributed systems Collaborate with remote engineering teams and communicate effectively in English Support reliable delivery through engineering best practices and modern development workflows Must-Have Requirements: Strong hands-on experience with C# and .NET Strong hands-on experience with React Experience with MS SQL Server , including schema design and query optimisation Experience working with APIs, integrations, and complex backend systems Background in enterprise-level or fintech software development Very good spoken and written English Flexibility to adapt to different technical tasks and team needs Nice to Have: Experience with CI/CD pipelines Experience with Docker or containerisation Cloud experience with Azure or AWS Previous experience in financial services , trading, investment management, or regulated environments Note: Only candidates who are selected to proceed to the next stage will be contacted

🏢 Summary: Lead a full-stack development team in building, maintaining, and scaling applications in an agile environment. The role combines hands-on .NET/C# development with technical leadership, strategic project direction, and close collaboration with Business Analysts. 🗂️ Requirements: Proficiency in .NET, Proficiency in C#, Full-stack development experience, Front-end development experience, Document-based database knowledge, Event-based messaging framework knowledge, Cloud services experience, Containerization experience 📃 Skills: .NET, C#, Full-stack, Frontend, Databases, Messaging, Cloud, Containerization, Angular, MongoDB 🏢 Description: Summary The role focuses on leading the development team to create new solutions and maintain systems within an agile environment, emphasizing 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: Fullstack Developer role focused on building scalable web applications using ASP.NET, C#, and React, with strong emphasis on API design, event-driven architecture, and cloud-native environments. The position involves end-to-end development, CI/CD practices, containerized deployments, and collaboration in agile teams. Ideal for engineers experienced in backend services, modern frontend ecosystems, and orchestration tools. 🗂️ Requirements: Strong experience with ASP.NET, Strong experience with C#, Experience building scalable backend services and APIs, Strong experience with React, Understanding of modern frontend architecture, Experience with API design, Experience with GitLab CI/CD, Experience with RabbitMQ, Experience with Docker, Experience with Kubernetes 📃 Skills: ASP.NET, C#, React, TanStack, Tailwind, Playwright, RabbitMQ, Docker, Kubernetes, GitLab, Linux, Unity, APIs, CI/CD 🏢 Description: Role Overview We are looking for a skilled Fullstack Developer with strong backend expertise in ASP.NET and C#, combined with modern frontend development using React. The role involves building scalable web applications, designing robust APIs, and contributing to cloud-native and event-driven architectures. The ideal candidate is comfortable working across the full stack, collaborates well in agile teams, and has an interest in modern tooling, orchestration, and frontend ecosystems. Core Responsibilities • Design, develop, and maintain scalable fullstack applications • Build and maintain backend services using ASP.NET and C# • Develop responsive and modern frontend applications using React • Design and integrate APIs and asynchronous communication flows • Collaborate with developers, designers, QA, and DevOps teams • Contribute to architecture discussions and technical decisions • Ensure code quality through testing, reviews, and CI/CD practices • Participate in deployment, monitoring, and troubleshooting activities Must-Have Skills Backend • Strong experience with ASP.NET • Strong experience with C# • Experience building scalable backend services and APIs Frontend • Strong experience with React • Good understanding of modern frontend architecture and component-based development Should-Have Skills • Experience with GitLab Pipelines / CI-CD • Experience with API design and best practices Frontend Libraries & Tooling • Experience with: o TanStack o Tailwind CSS o Playwright o AI agent development (Kiro, Claude, Cursor) Messaging & Async Communication • Experience with: o RabbitMQ o Event-driven and asynchronous communication patterns • Understanding of async workflows across frontend and backend systems Infrastructure & Orchestration • Experience with: o Docker o Kubernetes • Familiarity with containerized deployments and orchestration Nice-to-Have Skills • Interest or experience in Unity / game development • Strong Linux competence Preferred Qualifications • Experience working in agile development environments • Strong problem-solving and debugging skills • Understanding of scalable and maintainable software architecture • Good communication and collaboration skills • Passion for learning modern technologies and frameworks Tech Stack Summary Area Backend: ASP.NET, C# Frontend: React Frontend Libraries: TanStack, Tailwind, Playwright Messaging: RabbitMQ Infrastructure: Docker, Kubernetes CI/CD: GitLab Pipelines Additional: Linux, API Design, Unity

🏢 Summary: Senior Full Stack Developer role focused on building and maintaining scalable financial-sector applications using .NET and React. The position involves backend and frontend development, API design, automated testing, and collaboration with cross-functional teams in a global engineering environment. 🗂️ Requirements: 6+ years of Full Stack Development experience, Strong knowledge of C#, Strong knowledge of .NET, Strong knowledge of React, Experience with Microsoft SQL Server, Experience with REST APIs, Experience with automated testing, Experience with CI/CD, Experience with Git, Experience with Docker, Understanding of software architecture, Understanding of microservices, Understanding of distributed systems, Strong problem-solving skills, Strong communication skills, Fluent English 📃 Skills: C#, NET, React, SQL, REST, Git, Docker, CI/CD, Microservices 🏢 Description: Senior Full Stack Developer (.NET & React) We are looking for an experienced Senior Full Stack Developer to join a global engineering team building business-critical applications for the financial sector. You will be responsible for designing, developing, and maintaining scalable backend services and modern web applications, working closely with business stakeholders and cross-functional teams. Responsibilities Design, develop, and maintain applications using C#/.NET and React . Build scalable APIs and responsive user interfaces. Collaborate with business and technical teams to deliver high-quality solutions. Write automated tests and contribute to CI/CD and DevOps best practices. Support production systems and drive continuous improvements in performance and reliability. Requirements 6+ years of experience as a Full Stack Developer. Strong expertise in C#/.NET , React , and Microsoft SQL Server . Experience with REST APIs, automated testing, CI/CD, Git, and Docker. Good understanding of software architecture, microservices, and distributed systems. Strong problem-solving and communication skills. Fluent English. Nice to Have Experience in the financial services or trading domain. Experience working in distributed, international teams.

🏢 Summary: Fullstack Developer role focused on building and enhancing dynamic web applications using .NET on the backend and React on the frontend. The position involves developing robust, high-performance solutions, integrating APIs, and resolving complex technical issues within a collaborative team environment. Strong emphasis is placed on delivering seamless end-to-end functionality. 🗂️ Requirements: 5+ years of fullstack development experience, .NET backend expertise, Strong React knowledge, Experience with WCF and REST APIs, Database management experience, Proficiency in HTML, JavaScript, CSS, Understanding of message queues, Fluent English communication 📃 Skills: .NET, C#, React, REST, WCF, SQL, HTML, JavaScript, CSS, Databases, MessageQueues, English 🏢 Description: Summary: The ideal candidate is expected to function as a Fullstack Developer, contributing both front-end and back-end functionalities with a strong focus on .NET and React technologies. The primary goal is to enhance the team's capabilities in developing seamless, robust applications. Main Responsibilities: Engage in full-stack development to create dynamic web applications. Implement the front-end components using React. Develop back-end services using .NET. Communicate effectively with team members and stakeholders in English. Investigate and resolve complex technical problems proactively. Collaborate with team members to enhance application performance and usability. Key Requirements: 5+ years of experience in fullstack development. Expertise in .NET for backend development. Strong understanding of React for frontend development. Fluent communication skills in English. Knowledge of Web APIs (WCF and REST APIs). Familiarity with database management. Competence in HTML, JavaScript, and CSS. Understanding of message queues. Nice to Have: Experience with cloud services or platforms. Familiarity with CI/CD practices. Exposure to Agile methodologies.

🏢 Summary: Fullstack Developer role focused on building and enhancing dynamic web applications using .NET on the backend and React on the frontend. The position involves developing robust services, implementing responsive UI components, and resolving complex technical issues. The goal is to strengthen the team’s capability to deliver high-performance, scalable applications. 🗂️ Requirements: 5+ years of fullstack development experience, .NET expertise for backend development, Strong React knowledge for frontend development, Experience with Web APIs (WCF, REST), Database management experience, Proficiency in HTML, JavaScript, CSS, Understanding of message queues 📃 Skills: .NET, React, WCF, REST, WebAPI, HTML, JavaScript, CSS, SQL, Databases, MessageQueues 🏢 Description: Summary: The ideal candidate is expected to function as a Fullstack Developer, contributing both front-end and back-end functionalities with a strong focus on .NET and React technologies. The primary goal is to enhance the team's capabilities in developing seamless, robust applications. Main Responsibilities: Engage in full-stack development to create dynamic web applications. Implement the front-end components using React. Develop back-end services using .NET. Communicate effectively with team members and stakeholders in English. Investigate and resolve complex technical problems proactively. Collaborate with team members to enhance application performance and usability. Key Requirements: 5+ years of experience in fullstack development. Expertise in .NET for backend development. Strong understanding of React for frontend development. Fluent communication skills in English. Knowledge of Web APIs (WCF and REST APIs). Familiarity with database management. Competence in HTML, JavaScript, and CSS. Understanding of message queues. Nice to Have: Experience with cloud services or platforms. Familiarity with CI/CD practices. Exposure to Agile methodologies.

🏢 Summary: Senior Full Stack Developer role focused on designing, building, and enhancing enterprise-level applications using .NET and React. The position involves contributing to architecture decisions, improving performance and usability, and ensuring application reliability across the full technology stack. It includes ownership of backend services, frontend development, CI/CD processes, and production support. 🗂️ Requirements: Minimum 5 years of professional experience in .NET application development, Strong proficiency in C# and Web API, Hands-on experience with React for web application development, Advanced knowledge of SQL Server and database architecture, Experience with CI/CD pipelines, Understanding of Software Development Life Cycle, Proficiency in HTML5 and CSS, Experience in system architecture and design patterns, Ability to troubleshoot production issues 📃 Skills: .NET, C#, WebAPI, React, SQL, SQLServer, CI/CD, HTML5, CSS, SDLC 🏢 Description: We Are Hiring: Senior Full Stack Developer (.NET and React) We are seeking an experienced Full Stack Developer who is ready to play a key role in designing, building, and improving enterprise-level applications. This position is ideal for someone who enjoys working across the entire technology stack, contributing to architectural decisions, enhancing user experiences, and ensuring application reliability and performance. This is a senior-level opportunity for a professional who combines deep technical expertise with strong analytical thinking and a proactive mindset. Key Responsibilities Contribute to system architecture planning and technical design discussions Drive user interface enhancements to improve usability, performance, and overall application resilience Apply industry-recognized design principles and architectural patterns when implementing solutions Review and interpret business and technical requirements, proposing improvements where appropriate Produce clear and detailed technical documentation for developed features and systems Build proof-of-concept solutions and prototypes to validate architectural approaches Oversee and manage system modifications within structured service management processes Support and enhance automation initiatives across development and operational workflows Deliver high-quality technical support, ensuring timely resolution of issues Collaborate closely with stakeholders to understand objectives and provide effective solutions Required Qualifications and Experience A minimum of Five years of professional experience developing and maintaining production-grade applications within the .NET ecosystem Strong proficiency in C# and Web API development, with experience building secure, scalable, and high-performing backend services Solid hands-on experience with React, developing dynamic, responsive, and performance-optimized web applications Advanced knowledge of database architecture and SQL Server, including complex query development, performance optimization, and tuning Practical experience with continuous integration and continuous delivery pipelines Comprehensive understanding of the Software Development Life Cycle, from requirements analysis through deployment and ongoing support Strong command of modern web standards including HTML5 and Cascading Style Sheets, with the ability to create intuitive user interfaces Excellent analytical and troubleshooting abilities, particularly in demanding production environments High attention to detail and commitment to delivering robust, maintainable solutions If you are passionate about developing high-quality software, improving system performance, and contributing to meaningful technical decisions, we would welcome the opportunity to connect with you. Please feel free to reach out directly or share this opportunity within your professional network. #Hiring #FullStackDeveloper #DotNet #React #SoftwareEngineering #TechnologyCareers

🏢 Summary: B2B contract role for a Full-Stack Developer (.NET + Blazor WebAssembly) focused on developing and maintaining backend services and microfrontend-based solutions in a financial domain project. The position involves designing system components, implementing REST integrations, and contributing to system architecture. Work is remote or hybrid with a long-term project perspective. 🗂️ Requirements: 4+ years of experience in a similar role, Experience in C#, Experience in .NET / .NET Core, Experience in Blazor WebAssembly, Experience with Entity Framework Core, Experience with SQL Server, Experience with microfrontends, Experience with Git or Bitbucket 📃 Skills: C#, .NET, .NETCore, Blazor, WebAssembly, EntityFrameworkCore, SQLServer, REST, Git, Bitbucket, Microfrontends 🏢 Description: Dołącz do zespołu z sektora finansowo-ubezpieczeniowego, w organizacji która tworzy nowoczesne rozwiązania IT, realizuje transformację cyfrową w skali całej grupy kapitałowej oraz buduje kompleksowe ekosystemy dla klientów. W roli Full-Stack Developera (.NET + Blazor WebAssembly) będziesz odpowiedzialny za pracę na narzędziu klienta, w tym między innymi za rozwój i utrzymanie usług backendowych w technologii .NET czy implementację integracji w oparciu o REST API. Kluczowe obowiązki Rozwój i utrzymanie usług backendowych w technologii .NET; Implementacja integracji w oparciu o REST API oraz Apache Kafka; Analiza wymagań oraz projektowanie komponentów systemu; Udział w definiowaniu i rozwoju architektury (backend + mikrofrontendy); Refaktoryzacja oraz rozwój istniejących modułów systemu. Idealny profil kandydata Ponad 4 lata doświadczenia na podobnym stanowisku Doświadczenie w programowaniu w C# oraz .NET / .NET Core Doświadczenie w tworzeniu aplikacji frontendowych w Blazor WebAssembly Doświadczenie w pracy z Entity Framework Core oraz bazą danych SQL Server Doświadczenie w pracy z mikrofrontendami Umiejętność pracy z systemami kontroli wersji (Git / Bitbucket) Mile widziane: Doświadczenie z Apache Kafka (producenci, konsumenci) Podstawowa znajomość JavaScript / TypeScript Doświadczenie w tworzeniu testów automatycznych (xUnit, NUnit, testy integracyjne) Warunki współpracy Dostępność: ASAP Projekt : Najprawdopodobniej do końca roku; z możliwością przedłużenia Lokalizacja: Warszawa Model pracy: zdalny bądź hybrydowy - 1 dzień z biura, 4 dni zdalnie. Biuro znajduje się na Woli Forma współpracy: kontrakt B2B Stawka: 150 PLN/h Etapy rekrutacji Rozmowa z rekruterem z KUBO (20 minut) 1 lub 2 etapy z klientem Ostateczna decyzja i feedback