.NET WinForms Developer

🏢 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: Senior Front End Developer role focused on building and maintaining enterprise-grade financial applications in a hybrid work model in Wrocław. The position involves working with modern frontend architecture, micro-frontends, and interoperability standards within an international team. 🗂️ Requirements: 8+ years of Front End development experience, Commercial experience with JavaScript, Commercial experience with TypeScript, Experience with React or similar frameworks, Understanding of component-based architecture, Knowledge of state management, Ability to work in an international team, Good communication skills 📃 Skills: JavaScript, TypeScript, React, Aurora, NEO, FDC3 🏢 Description: 📍 Wrocław, Poland (hybrid 3 days/week from the office) ⏳ 7+ years of commercial experience We are looking for an experienced Front End Developer to join team in Wrocław. The project is focused on building and maintaining enterprise-grade applications for a client in the financial domain. Tech stack and ecosystem: • Aurora – UI component library and design system • NEO – platform infrastructure and micro-frontend architecture • FDC3 – interoperability standard for financial desktop apps (intra-application communication) What we expect: • 8+ years in Front End development (JavaScript / TypeScript, React or similar) • Solid understanding of component-based architecture and state management • Experience with financial desktop ecosystems or complex B2B products is a plus • Good communication skills and ability to work in an international team Hit the apply button and let's get started! 🔥

🏢 Summary: The offer is for a .NET Developer to join a backend team building and enhancing systems that support business operations, integrations, and data processing in an international environment. The role focuses on developing high-performance .NET applications, designing APIs, and collaborating within a mixed .NET and Java ecosystem. It includes work on integrations, CI/CD processes, and cooperation with distributed teams in a hybrid work model. 🗂️ Requirements: Minimum 3 years of professional experience in .NET development, Strong knowledge of C#, Experience with Java, Experience in backend development and API creation, Working knowledge of relational databases, Familiarity with Git, Experience working in Agile/Scrum teams, English proficiency at B2 level or higher 📃 Skills: .NET, C#, Java, REST, Git, SQL, MS SQL Server, SQLite, PostgreSQL, CI/CD 🏢 Description: 📍Contract of Employment 📍Gliwice - hybrid (50%) 📍17.000 - 21.000PLN gross monthly Position Overview We are seeking a .NET Developer to join a backend team responsible for building and enhancing systems that support business operations, integrations, and data processing in our client’s international environment. This role focuses mainly on .NET technologies while offering opportunities to collaborate within a broader ecosystem that also includes Java-based solutions. What You’ll Be Working On Developing, maintaining, and optimizing backend applications built on .NET to ensure high performance and reliability Designing and implementing APIs that meet business and technical expectations Analyzing requirements and delivering new features, improvements, and system enhancements Supporting and expanding existing solutions Creating and managing integrations with internal and external systems Troubleshooting issues, performing root-cause analysis, and ensuring long-term stability Cooperating with distributed teams across locations such as Poland and Germany Participating in code reviews and shaping coding standards and best practices Preparing and maintaining clear, structured technical documentation Supporting deployment processes and contributing to CI/CD pipelines What We Expect From You At least 3 years of professional experience in .NET development Strong command of C# Experience with Java and readiness to work in a combined .NET + Java ecosystem Experience in backend development and API creation Working knowledge of relational databases Familiarity with Git Experience in Agile/Scrum teams Strong communication skills and readiness to collaborate in an international setting English at B2 level or higher Technology Environment .NET (including .NET Framework, .NET Core, .NET 5+) C# REST APIs Git Databases such as MS SQL Server, SQLite, PostgreSQL CI/CD tools and pipelines Hays Poland sp. z o.o. jest agencją zatrudnienia zarejestrowaną w rejestrze prowadzonym przez Marszałka Województwa Mazowieckiego pod numerem 361.

🏢 Summary: Senior .NET/WPF Developer role focused on designing, developing, and maintaining advanced desktop applications in a hybrid work model. The position involves working with modern .NET technologies, reporting tools, and MS SQL Server, while collaborating with database teams and participating in client interactions. 🗂️ Requirements: 8+ years of experience with .NET technology stack, Strong expertise in WPF, .NET Framework 4.6+ proficiency, Strong knowledge of C#.NET, Experience with Unity Framework, Experience with Entity Framework 6, Experience with MS SQL Server, Experience with reporting tools: Crystal Reports, RDLC, Aspose, Excel, Proficiency with Visual Studio 2015/2017 Professional, Experience with SSDT, Fluent Polish and English, Availability for hybrid work (2–3 days onsite) 📃 Skills: WPF, .NET, C#, Unity, EntityFramework, MSSQL, CrystalReports, RDLC, Aspose, Excel, VisualStudio, SSDT 🏢 Description: Location: Łódź or Warsaw, Poland. Hybrid 2/3 days per week. Language Requirements: English & Polish About the Role: We are looking for an experienced Senior .NET/WPF Developer to join the team. This role involves developing and maintaining advanced desktop applications and contributing to high-quality software solutions. Key Responsibilities: Design, develop, and maintain desktop applications using WPF , .NET Framework 4.6+ , C#.NET , and Unity Framework . Work with Entity Framework 6 for database interactions. Develop, customize, and maintain reports using Crystal Reports , RDLC , Aspose , and MS Excel . Collaborate with database teams using MS SQL Server . Use Visual Studio 2015/2017 Professional and SSDT for development and database management. Participate in client interactions Requirements: 8+ years of experience with the technology stack listed above. Strong expertise in WPF, .NET Framework 4.6+, C#.NET, Unity Framework, Entity Framework 6 . Solid experience with MS SQL Server and reporting tools ( Crystal Reports, RDLC, Aspose, Excel ). Proficient with Visual Studio 2015/2017 Professional and SSDT . Fluent in Polish and English (both written and spoken). Ability to work 2–3 days per week onsite , and full-time during client visits (1 week) as required.

🏢 Summary: Long-term hybrid opportunity for an experienced .NET Developer to work on digital products and technology services for a major international investment bank. The role involves backend and frontend development, cloud-based architecture on Azure, and building scalable, secure microservices-based solutions. You will contribute across the full software development lifecycle, from design to deployment and production support. 🗂️ Requirements: Bachelor’s or Master’s degree in Computer Science, Computer Engineering, or related field, Strong experience with C# and .NET Core, .NET 6 or later experience, Experience building frameworks and APIs, Knowledge of object-oriented design, Design Patterns, SOLID, Understanding of multithreading, Experience with Microsoft Azure services, Experience with microservices architecture, Experience with event-driven architecture, Experience with messaging platforms, Experience with containers, Experience with React, Experience with TypeScript or JavaScript, Experience with CSS3 and HTML5, Agile mindset, Experience with Test Driven Development, Knowledge of DevOps practices, Focus on Clean Code principles 📃 Skills: C#, .NET, .NET6, API, OOP, SOLID, Multithreading, Azure, AKS, Containers, WebApps, AzureFunctions, ServiceBus, StorageAccounts, KeyVault, Microservices, EventDriven, Kafka, Kubernetes, React, TypeScript, JavaScript, CSS3, HTML5, TDD, DevOps 🏢 Description: We are currently looking for talented and experienced .NET Developer to join a long-term project with a major international Swiss investment bank operating in the financial sector. 📍 Location: Wroclaw or Krakow 🏢 Hybrid model: 3 days per week from the office Responsibilities Design, develop, and improve digital products and technology services for clients and employees Apply a broad range of software engineering practices, from analyzing user needs to automated testing and deployment Ensure quality, security, reliability, and compliance of solutions Build observability into solutions, monitor production health, resolve incidents, and remediate root causes Understand and advocate for client needs Share knowledge with colleagues, support hiring, and contribute to engineering culture and internal communities Requirements Education Bachelor’s and/or Master’s degree in Computer Science, Computer Engineering, or related technical discipline Backend / .NET Strong experience with C# and .NET Core Experience developing frameworks and APIs using .NET 6 or later Understanding of object-oriented design, Design Patterns, and SOLID principles Understanding of multi-threading Cloud & Infrastructure Experience with Microsoft Azure services: AKS Containers Web Apps Azure Functions Service Bus Storage Accounts Key Vault Experience with Cloud architecture and engineering, ideally Azure Architecture Experience with: Microservice architecture Event-Driven architecture Service/Micro-Service architectures Loosely coupled systems Reusable components Messaging & Containers Experience with messaging platforms, ideally Kafka Experience with Containers, ideally Kubernetes Frontend Experience with React Experience with TypeScript / JavaScript Experience with CSS3 and HTML5 Engineering Practices Agile mindset Test Driven Development (TDD) DevOps practices Focus on Clean Code and engineering best practices Benefits ✅ Stable long-term cooperation with opportunity for extension Opportunity to work with modern technologies in an international environment Professional growth and continuous development opportunities Participation in challenging and impactful projects 📩 If you’re interested and meet the qualifications, please send your CV at alina.pchelnikova@dcvtechnologies.co.uk

🏢 Summary: Offer for a .NET Developer to design and implement C#/.NET functionality and build a UI for an internal industrial automation tool, collaborating with firmware teams. The role emphasizes clean code practices and active participation in Scrum-based development. Remote B2B cooperation with competitive hourly rate. 🗂️ Requirements: 2-3 years of commercial or open-source software development experience, Proficiency in C# and .NET, Experience with UI development, Knowledge of data structures, Understanding of object-oriented design, Knowledge of design patterns, Experience working in Scrum/Agile, English level B2 minimum 📃 Skills: C#, .NET, Angular, TypeScript, Scrum, Agile, OOP, UI, Git 🏢 Description: For a company in the industrial automation sector we are looking for a person for the position of .NET Developer who will cooperate with firmware teams. Key responsibilities Designing and implementing functionality using .NET / C# for application Creating and developing the user interface (UI) for an internal company tool Ensuring high code quality (clean code, code reviews, refactoring) Participating in the software development process in accordance with Scrum / Agile, including Scrum ceremonies (daily meetings, sprint planning) Ideal candidate profile 2-3 years of experience in development of commercial or open-source software (preferably experience in the industrial automation sector) Required programming languages: C# (.NET) Optional programming languages: Angular/TypeScript are a plus Experience working with data structures, object-oriented design and design patterns Agile software development using Scrum Very good knowledge of English, minimum level B2 Conditions Location: Katowice Working mode: remote Form of cooperation: B2B Salary: 100-125 PLN / h Benefits: private medical care, life insurance, Multisport Recruitment Steps Initial call with a recruiter (20 min) Interview with the manager (90 min) Decision and feedback

🏢 Summary: Hybrid Regular .NET Developer role focused on building and maintaining IT solutions for the financial sector, including Oracle-based systems and web applications. The position involves software development, system design, testing, documentation, and collaboration with business users and external vendors. Candidates should have strong experience with .NET technologies, SQL, web development, and enterprise-scale financial systems. 🗂️ Requirements: Very good knowledge of .NET framework, Ability to work with LLMs, Minimum 3 years of experience with C# and .NET, Experience with WCF, Experience with SQL and SSIS, Knowledge of ASP.NET MVC, Proficiency in JavaScript, Proficiency in jQuery, Proficiency in HTML5 and CSS3, Experience with Visual Studio Ultimate 2013, Knowledge of unit testing and test automation, Experience developing web applications, Understanding of OOP principles and design patterns, Experience designing IT systems for financial institutions or enterprise environments, Ability to analyze business and system requirements, English proficiency for technical documentation 📃 Skills: .NET, C#, WCF, SQL, SSIS, HTML, HTML5, ASP.NET, MVC, JavaScript, jQuery, CSS3, VisualStudio, OOP, LLM, Oracle, PLSQL, UML, ITIL, AGILE, XP 🏢 Description: .NET Developer (Regular) Financial Technology Sector | Hybrid Work (Łódź, Poland) Work Model: Hybrid (On-site 2 times a month in Łódź) Role Overview & Responsibilities We are seeking a skilled Regular .NET Developer to join our team and build high-quality IT solutions for the financial sector. In this role, you will be responsible for: Conducting design and implementation work in IT systems (including Oracle-based technologies). Collaborating with end/business users to gather and analyze data requirements for new solutions, specifically detailing general tasks and business concepts. Actively participating in internal software testing. Creating and updating technical and functional system documentation. Cooperating in the development of new solutions and defining technical directions. Implementing actions to improve data quality in systems and applications exporting data to the data warehouse. Supporting the review of technical specifications, as well as project, technical, and administrative documentation prepared by third-party vendors. Key Requirements Absolute Must-Haves: Very good knowledge of the .NET framework. Ability to work with Large Language Models (LLMs) . Strong teamwork skills combined with high independence. Experience & Technical Skills: Minimum 3 years of programming experience in IT projects using C#, .NET (including v4.5), WCF, SQL, SQL Server Integration Services (SSIS), HTML, and ASP.NET MVC. Proficiency in JavaScript, jQuery, jQuery UI, HTML5, and CSS3. Familiarity with Visual Studio Ultimate 2013. Knowledge of unit testing and the test automation process. Proven experience in developing web applications. Strong understanding of Object-Oriented Programming (OOP) principles and design patterns. Practical experience designing and programming IT systems for financial institutions (or similar enterprise environments in terms of scale, complexity, and quality standards). Soft Skills & Competencies: High degree of independence, goal orientation, and consistency in task execution. Excellent work organization, fast learning ability, and teamwork skills. Knowledge of business and system requirements analysis, specifically analytical thinking and precise communication. Ability to effectively cooperate with business clients, internal stakeholders, and external suppliers. High communication skills, natural inquisitiveness, and negotiation abilities. English proficiency sufficient for freely working with technical documentation and literature. Nice to Have Understanding of basic UX design principles. Familiarity with AGILE and XP methodologies. Knowledge of PL/SQL and Oracle databases. Practical knowledge of at least one CASE tool (e.g., Sparx Systems Enterprise Architect) and UML. Experience working in a matrix organizational structure. Familiarity with ITIL best practices.

🏢 Summary: Long-term hybrid .NET Developer role for an international Swiss investment bank focused on building and improving digital products and technology services using modern cloud, microservices, and frontend technologies. The position involves full software development lifecycle responsibilities, production support, and collaboration within agile engineering teams. 🗂️ Requirements: Bachelor’s or Master’s degree in Computer Science, Computer Engineering, or related discipline, Strong experience with C# and .NET Core, Experience building frameworks and APIs with .NET 6 or later, Understanding of object-oriented design, Design Patterns, and SOLID principles, Understanding of multi-threading, Experience with Microsoft Azure services, Experience with cloud architecture and engineering, Experience with microservice and event-driven architectures, Experience with messaging platforms, Experience with containers and Kubernetes, Experience with React, Experience with TypeScript or JavaScript, Experience with CSS3 and HTML5, Agile mindset, Experience with Test Driven Development, Knowledge of DevOps practices, Focus on Clean Code and engineering best practices 📃 Skills: C#, .NET, .NETCore, .NET6, Azure, AKS, Containers, WebApps, AzureFunctions, ServiceBus, StorageAccounts, KeyVault, Microservices, EventDriven, Kafka, Kubernetes, React, TypeScript, JavaScript, CSS3, HTML5, TDD, DevOps, SOLID, Multithreading 🏢 Description: We are currently looking for talented and experienced .NET Developer to join a long-term project with a major international Swiss investment bank operating in the financial sector. 📍 Location: Wroclaw or Krakow 🏢 Hybrid model: 3 days per week from the office Responsibilities Design, develop, and improve digital products and technology services for clients and employees Apply a broad range of software engineering practices, from analyzing user needs to automated testing and deployment Ensure quality, security, reliability, and compliance of solutions Build observability into solutions, monitor production health, resolve incidents, and remediate root causes Understand and advocate for client needs Share knowledge with colleagues, support hiring, and contribute to engineering culture and internal communities Education Bachelor’s and/or Master’s degree in Computer Science, Computer Engineering, or related technical discipline Backend / .NET Strong experience with C# and .NET Core Experience developing frameworks and APIs using .NET 6 or later Understanding of object-oriented design, Design Patterns, and SOLID principles Understanding of multi-threading Cloud & Infrastructure Experience with Microsoft Azure services: AKS Containers Web Apps Azure Functions Service Bus Storage Accounts Key Vault Experience with Cloud architecture and engineering, ideally Azure Architecture Experience with: Microservice architecture Event-Driven architecture Service/Micro-Service architectures Loosely coupled systems Reusable components Messaging & Containers Experience with messaging platforms, ideally Kafka Experience with Containers, ideally Kubernetes Frontend Experience with React Experience with TypeScript / JavaScript Experience with CSS3 and HTML5 Engineering Practices Agile mindset Test Driven Development (TDD) DevOps practices Focus on Clean Code and engineering best practices Benefits ✅ Stable long-term cooperation with opportunity for extension Opportunity to work with modern technologies in an international environment Professional growth and continuous development opportunities Participation in challenging and impactful projects 📩 If you’re interested and meet the qualifications, please send your CV at alina.pchelnikova@dcvtechnologies.co.uk

🏢 Summary: Senior .NET Developer role focused on designing, building, and maintaining scalable .NET applications and APIs across diverse projects, including AI-driven and legacy modernization initiatives. The position involves backend development, architectural input, code quality improvement, and cloud-based deployments within Agile teams. B2B contract with flexible remote collaboration. 🗂️ Requirements: 5+ years experience with C# and .NET, .NET Core / .NET 6+ experience, ASP.NET Core experience, Entity Framework experience, Experience building RESTful APIs, SQL and NoSQL database experience, Cloud platform experience (AWS, Azure, or GCP), CI/CD pipeline knowledge, Git version control proficiency, Understanding of OOP and design patterns, Experience in Agile/Scrum, English level B2+ 📃 Skills: C#, .NET, .NETCore, ASP.NET, EntityFramework, REST, SQL, PostgreSQL, MySQL, MongoDB, AWS, Azure, GCP, CI/CD, Git, OOP, Scrum, AI 🏢 Description: Who we are: We are Inspeerity (part of DevelopX group), engineering consultancy providing software development and consultancy. Our primary expertise is systems architecture and full stack development – from defining project requirements, to designing, building, and deploying software applications for web, backend, enterprise and mobile. We are crazy about technology, serious about people. About position: We are currently building our talent pool for future Senior .NET Developer roles. As our company is expanding, you may have the opportunity to work on a variety of software solutions across multiple initiatives, including projects we will be delivering in the future, from building native AI solutions to modernizing legacy systems. If you enjoy collaborating in a skilled team and are committed to delivering top-notch software, we’d love to connect. We're not prescriptive about background. Whether you've worked in fintech, SaaS, e-commerce, or enterprise systems, what matters is that you've shipped production software at scale, cared about its reliability, and learned from what broke. TL;DR • Who: Senior .NET Developer • Contract Type: B2B Framework Agreement • Salary range: Up to 150 PLN/h • Company: Software House What you’ll be doing: • Designing, implementing, and maintaining high-quality .NET applications. • Developing backend components and APIs to support scalable software solutions. • Collaborating with cross-functional teams. • Reviewing and refactoring code to ensure maintainability, performance, and security. • Participating in technical design discussions and contributing to architecture decisions. • Writing and maintaining technical documentation for systems, APIs, and processes. • Supporting deployment and integration of applications in different environments. You will be the best fit if you have: • 5+ years of experience as a C#/.NET developer, preferably with exposure to .NET Core / .NET 6+ , ASP.NET Core , Entity Framework or similar frameworks. • Strong understanding of object-oriented programming, design patterns, and clean code principles. • Experience with RESTful APIs and web services integration. • Familiarity with SQL and NoSQL databases (e.g., PostgreSQL, MySQL, MongoDB). • Experience with cloud environments such as AWS, Azure, or GCP. • Knowledge of CI/CD pipelines and version control systems (e.g., Git). • Strong problem-solving skills and ability to troubleshoot complex issues. • English level B2 or higher. • Experience working in Agile/Scrum teams and contributing to iterative development. • Experience with AI technologies, including using AI tools for development and building AI-powered features or applications. What we offer • Remote work or working from our Bialystok, Warsaw, Rzeszow offices. It's up to you! • Collaboration with experienced and engaged people who will appreciate your work and support you whenever you need it 😊 • Hybrid and flexible cooperation model based on a B2B Framework Agreement. • Great working conditions and best equipment: Dell or MacBook, your choice. Good to know: We don’t require a degree. We don’t do whiteboard puzzles or trick questions. Our interview process is practical: a technical conversation, and a chat about how you work. We value direct communication and intellectual curiosity. If you’re someone who gets excited debugging a tricky concurrency issue - not because you have to, but because you want to understand it — we’ll get along well.

🏢 Summary: The offer is for a .NET Developer responsible for building and enhancing scalable backend systems and REST APIs for global travel platforms. The role involves contributing to architecture, optimizing performance, and collaborating in an agile environment to deliver reliable, high-quality software. It includes hybrid work, international projects, and professional development opportunities. 🗂️ Requirements: Minimum 3 years of commercial experience with .NET development, Strong knowledge of ASP.NET MVC, Experience developing REST APIs, Experience working in agile software development teams, Good knowledge of MS SQL, Good knowledge of Elasticsearch, Experience with CI/CD tools (Git, TeamCity or similar), Experience writing unit and integration tests, Ability to write clean, maintainable, and well-tested code, Very good English communication skills 📃 Skills: .NET, ASP.NET, MVC, REST, MS SQL, Elasticsearch, Git, TeamCity, CI/CD, UnitTesting, IntegrationTesting, Umbraco, Angular, AWS 🏢 Description: We are looking for a .NET Developer to join our team and help build scalable, high-quality solutions that power our global travel platforms. In this role, you will work on the development and enhancement of backend systems, contribute to architectural decisions, and collaborate with cross-functional teams to deliver reliable and efficient software used by customers worldwide. Your responsibilities Design, develop, and maintain applications using .NET technologies Translate business requirements into scalable and maintainable technical solutions Develop and enhance REST APIs and backend services Maintain, troubleshoot, and improve existing applications Refactor and optimize code to improve performance, scalability, and maintainability Write clean, well-structured, and testable code following best practices Participate in code reviews and contribute to improving development standards Identify and resolve performance bottlenecks and system issues Contribute to application architecture, technical design, and system documentation Collaborate closely with developers, QA engineers, Product Owners, and other stakeholders in an agile environment Our requirements At least 3 years of commercial experience with .NET development Strong knowledge of ASP.NET MVC and REST APIs Experience working within agile software development teams Good knowledge of MS SQL and Elasticsearch Experience with CI/CD tools and practices (Git, TeamCity or similar) Experience writing unit and integration tests Ability to write clean, maintainable, and well-tested code Very good English communication skills Nice to have Experience with Umbraco CMS Experience with Angular Knowledge of AWS services and cloud-based solutions How we work Clean Code principles Design patterns and software engineering best practices Code reviews and knowledge sharing Static code analysis Continuous Integration and Continuous Deployment (CI/CD) Agile and collaborative development environment What we offer Hybrid work model (1–2 days per week in our Katowice office) Opportunity to work on international, large-scale projects Attractive remuneration paid in EUR Flexible working hours Individual development budget Partially or fully funded training and certifications English lessons Mentoring and support from experienced technical leaders Participation in conferences in Poland and abroad A culture focused on learning, collaboration, and knowledge sharing Space to innovate and bring your own ideas to life Support for IT community initiatives