Senior .NET Developer (WPF / Desktop Applications)

🏢 Summary: Senior .NET WPF Developer role focused on building and enhancing a Windows 11 desktop application for healthcare-related devices in the medical technology domain. The position involves developing safety-critical software solutions, implementing new features, testing, and supporting regulatory documentation and certification processes. The role is suited for experienced .NET and WPF developers working in a quality- and compliance-driven environment. 🗂️ Requirements: 5+ years of commercial experience with .NET and C#, Strong WPF desktop application development experience, Practical experience with MVVM, Experience with Git, Experience with software development lifecycle tools, English proficiency for international communication, Residency in Poland 📃 Skills: .NET, C#, WPF, MVVM, Git, Windows, SDLC 🏢 Description: We are looking for a Senior .NET WPF Developer to join a team delivering a project in the medical technology domain focused on developing advanced software solutions for healthcare-related devices. In this role, you will contribute to the development of a Windows 11 desktop application and play a key part in building and enhancing core product functionalities. The project involves working on solutions with high-quality, safety, and compliance requirements. Your tasks - Developing and maintaining a desktop application built with .NET, C#, and WPF for the Windows 11 platform - Designing and implementing new features in line with business requirements and quality standards applicable to safety-critical solutions - Creating and configuring customized Windows 11 system images to support application deployment and operation - Preparing, executing, and analyzing functional and technical tests to ensure the highest quality of the solution - Collaborating on technical and regulatory documentation required for product certification processes Requirements - At least 5 years of commercial experience in software development using .NET and C# - Strong expertise in WPF and desktop application development - Practical experience with the MVVM architectural pattern - Experience working with version control systems (Git) and software development lifecycle tools - Good command of English, enabling effective communication in an international environment - Residency in Poland Nice-to-have requirements - Knowledge of regulatory requirements within the medical industry or other highly regulated sectors - Experience supporting product certification processes or preparing compliance-related documentation

🏢 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 enhancing distributed microservices for digital banking systems in a European financial environment. The position involves designing scalable, high-quality solutions using C# and .NET, implementing asynchronous communication, and ensuring robust automated testing practices. Remote-first model with collaboration on complex financial platforms. 🗂️ Requirements: 5+ years of experience in C# and .NET development, Strong experience with microservices architecture, Knowledge of CQRS, REST, OOP, EventSourcing, Experience with RabbitMQ or Kafka, Experience with NoSQL and relational databases, Experience with automated testing (unit, integration, contract), Knowledge of DomainDrivenDesign principles, Understanding of BPMS workflows, Experience with Git, Good command of Polish, Legal right to work in the EU 📃 Skills: C#, .NET, Microservices, CQRS, REST, OOP, EventSourcing, RabbitMQ, Kafka, Git, NoSQL, SQL, Docker, Testcontainers, Pact, DomainDrivenDesign, BPMS 🏢 Description: Unleash innovation — revolutionize financial systems with expert .NET development! Wroclaw-based opportunity with remote work model (5 remote days per week). As a Senior .NET Developer , you will be working for our client, a leading financial organization committed to transforming the digital banking experience. You’ll contribute to building and enhancing distributed microservices that enable seamless financial operations across Europe, driving innovation and operational excellence. Your main responsibilities: Develop and maintain scalable, high-quality microservices using C# and .NET technologies following Domain-Driven Design principles. Design and implement asynchronous communication patterns with RabbitMQ or Kafka to ensure system robustness. Collaborate with cross-functional teams to create automated tests, including unit, integration, and contract tests, utilizing Docker, Testcontainers, and Pact. Optimize code for performance, scalability, and reliability, adhering to Clean Code standards. Implement RESTful APIs and work with NoSQL and relational databases for effective data management. Contribute to the continuous improvement of development processes and best practices. Engage proactively in team collaboration, sharing knowledge and solving complex technical challenges. You're ideal for this role if you have: Minimum of 5 years of experience in C# and .NET development in a senior role. Understanding of workflows in BPMS platforms. Strong knowledge of microservices architecture, CQRS, REST, OOP, and Event Sourcing. Practical experience with asynchronous messaging (RabbitMQ/Kafka), Git, NoSQL databases, and relational databases. Familiarity with automated testing frameworks, including unit, integration, and contract testing. Good understanding of Domain-Driven Design (DDD) principles and clean code practices. Excellent team collaboration skills and a responsible, engaged work attitude. It is a strong plus if you have: Experience with Polish language communication skills. Knowledge of automated testing tools and frameworks. Language Required for the role: Polish: Good command Eligibility for the role: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.

🏢 Summary: Senior .NET Developer role focused on building and maintaining extended functionalities within a distributed, cloud-based system. The position involves working with modern .NET technologies, Angular, cloud platforms, and microservices architecture in an Agile/Scrum environment. The role requires close collaboration with stakeholders while applying clean code and best development practices. 🗂️ Requirements: Bachelor’s degree or Microsoft .NET certification, Strong experience with .NET and C#, Experience with ASP.NET Core and Web API, Experience with Angular (2+), Experience with Azure or AWS, Experience with microservices and distributed systems, Experience with PostgreSQL and SQL Server, Experience with database migrations, Experience with GitHub, Knowledge of SOLID and DRY principles, Fluent English (written and spoken) 📃 Skills: .NET, C#, ASP.NET, Angular, Azure, AWS, Microservices, Kafka, PostgreSQL, SQL, GitHub, WebAPI 🏢 Description: We are looking for a Senior .Net Developer . Responsibility: Develop and maintain extended functionalities Collaborate closely with internal and external consultants, as well as key business stakeholders Work with technologies including Angular (2+), Azure/AWS Cloud, and the .NET stack (.NET 8/9, ASP.NET Core, C#, Web API), along with microservices and distributed systems, Kafka (or similar messaging tools), and databases such as PostgreSQL and SQL Server Actively participate in daily stand-ups, sprint reviews, and planning sessions with Danish colleagues, contributing to continuous improvement of the Scrum process To succeed in this role, you: Hold a relevant bachelor’s degree or a Microsoft certification related to .NET Apply clean code principles and best practices such as SOLID and DRY, with a strong object-oriented mindset Have proven experience in Microsoft .NET (C#), GitHub, PostgreSQL, and database migrations Communicate fluently in English, both written and spoken

🏢 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: 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: Senior .NET Developer role focused on designing and maintaining high-performance backend services using .NET and Azure for a scalable electronic components platform. The position involves building resilient cloud solutions, setting up test automation from scratch, and leveraging AI coding assistants in daily development. This is a 100% remote role requiring close collaboration with a US-based Agile team. 🗂️ Requirements: Minimum 8 years of professional experience in .NET development, Strong experience with C#, Experience with Azure cloud ecosystem, Experience with CosmosDB, Practical experience using AI tools in software development, Fluent English, Availability to attend meetings between 17:00 and 19:00 CET, Residence in Poland or eligibility to work in Poland 📃 Skills: .NET, C#, Azure, CosmosDB, Playwright, Selenium, GitHubCopilot, ChatGPT, Cursor, CI/CD, Git, TypeScript, JavaScript 🏢 Description: We are part of an international organization listed on Nasdaq Stockholm, operating in 11 countries. In Poland, we work with full autonomy. We independently choose our technologies, processes, and ways of working while maintaining the highest professional standards. We deliver a wide range of IT projects in Poland and internationally, across multiple domains and technologies. This allows our consultants to develop their competencies and gain experience aligned with their professional ambitions. Our collaboration is built around the CARE philosophy. For us, it means responsible project matching, transparent cooperation, and a long-term approach to professional growth. Join us as Senior .NET Developer Grow in an environment that cares about your development as much as you do. Your responsibilities Designing, developing, and maintaining high-performance back-end services using .NET and C# for an established, scalable system used for selecting electronic components and integrating with manufacturer databases. Working extensively with Azure cloud services and CosmosDB to build, maintain, and monitor resilient solutions. Setting up test automation structures and frameworks from scratch using tools like Playwright or Selenium . Actively leveraging AI coding assistants such as GitHub Copilot , ChatGPT , or Cursor to enhance productivity and troubleshooting, while proactively sharing AI-assisted development practices with the team. Collaborating directly with the US-based team in an Agile environment, actively participating in code reviews, sprint planning, and architectural discussions. Communicating with business stakeholders to understand requirements and translate them into effective technical solutions. Requirements Minimum 8 years of professional experience in .NET development, demonstrating a senior-level mindset and problem-solving capabilities. Experience with C# , the Azure cloud ecosystem, and CosmosDB . Practical experience in using modern AI tools in daily software development and a willingness to promote these practices. Fluency in English to ensure seamless communication with US managers and developers. Flexibility to align with US working hours, specifically attending daily meetings between 17:00 and 19:00 CET. You need to live in Poland and/or be eligible to work here. Nice to have: Background or interest in Electrical Engineering. General understanding of testing practices, CI/CD pipelines, and Git version control. Knowledge in TypeScript or JavaScript. What we offer 100% remote work Work in a Scandinavian culture built on logic and dialogue. Health and sports benefits tailored to your needs. Speed Coaching – short sessions that provide new perspectives and solutions. Sports training, an internal team, and opportunities to take part in competitions. Team events and development-focused meetups.

🏢 Summary: Senior .NET Developer role focused on designing and delivering scalable, cloud-native enterprise solutions using .NET 6+ and Microsoft Azure. The position involves building modern APIs and microservices, working with Kubernetes and containers, and ensuring high availability, security, and observability of distributed systems. Hybrid work model in Wroclaw with strong emphasis on DevOps, clean code, and engineering best practices. 🗂️ Requirements: 7+ years of professional software development experience, Strong hands-on experience with C# and .NET Core / .NET 6+, Proven experience building modern APIs and enterprise applications using .NET, Strong experience with Microsoft Azure services (AKS, Azure Containers, Azure Web Apps, Azure Functions, Azure Service Bus, Azure Storage Accounts, Azure Key Vault), Experience with messaging platforms, preferably Kafka, Strong experience with Containers and Kubernetes, Solid understanding of Microservices and Event-Driven Architecture, Strong knowledge of Object-Oriented Programming, Design Patterns, and SOLID principles, Good understanding of Multi-threading and concurrent programming, Experience with Cloud Architecture and Engineering on Azure, Experience with Azure App Services, Container Apps, Event Grid, Service Bus, Frontend experience with React and TypeScript/JavaScript, Strong knowledge of HTML5 and CSS3, Experience working in Agile environments using TDD and DevOps practices, Strong analytical, troubleshooting, and problem-solving skills, Excellent verbal and written communication skills 📃 Skills: C#, .NET, ASP.NET, Azure, AKS, Kubernetes, Docker, Kafka, React, TypeScript, JavaScript, HTML5, CSS3, Microservices, CI/CD, DevOps, TDD, EventGrid, ServiceBus, AzureFunctions, AzureStorage, AzureKeyVault 🏢 Description: Location: Wroclaw, hybrid 3 days/week About the Role We are looking for an experienced and passionate Senior .NET Developer with strong Azure expertise to join our engineering team. In this role, you will design, develop, and enhance scalable digital products and technology services used by clients and internal teams worldwide. You will work in a modern cloud-native environment, contribute to high-impact projects, and collaborate with cross-functional teams to build secure, reliable, and highly available enterprise solutions. Key Responsibilities Design, develop, and improve enterprise-grade digital products and technology services Analyze business and user requirements to deliver scalable and efficient technical solutions Develop modern APIs and backend services using .NET 6+ and Azure cloud technologies Apply software engineering best practices including automated testing, CI/CD, and DevOps methodologies Ensure quality, security, reliability, and compliance across all delivered solutions Build observability into applications, monitor production systems, troubleshoot incidents, and resolve root causes Contribute to cloud-native and microservices-based architecture initiatives Collaborate closely with product owners, architects, and engineering teams to deliver business value Advocate for client and user needs while driving technical excellence Share knowledge with peers, mentor team members, and contribute to engineering culture and hiring activities Required Skills & Experience 7+ years of professional software development experience Strong hands-on experience with C# and .NET Core / .NET 6+ Proven experience building modern APIs and enterprise applications using .NET technologies Strong experience with Microsoft Azure services including: AKS (Azure Kubernetes Service) Azure Containers Azure Web Apps Azure Functions Azure Service Bus Azure Storage Accounts Azure Key Vault Experience with messaging platforms, preferably Kafka Strong experience with Containers and Kubernetes Solid understanding of Microservices and Event-Driven Architecture Strong knowledge of Object-Oriented Programming, Design Patterns, and SOLID principles Good understanding of Multi-threading and concurrent programming Experience with Cloud Architecture and Engineering on Azure platforms Experience with: Azure App Services Container Apps Event Grid Service Bus Experience working in Agile environments using TDD and DevOps practices Passion for Software Craftsmanship, Clean Code, and engineering best practices Strong analytical, troubleshooting, and problem-solving skills Excellent verbal and written communication skills Nice to Have Experience implementing: Service-Oriented / Microservice Architectures Event-Based Architectures Loosely Coupled Systems Reusable Enterprise Components Experience working with distributed systems and high-scale applications Exposure to observability and monitoring tools

🏢 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: Senior .NET Developer role focused on building and maintaining secure, high-performance online banking solutions in a distributed Agile environment. The position involves developing backend features in .NET 8, optimizing SQL-based data access, and working with containerized applications. Hybrid work model with strong emphasis on reliability, security, and collaboration. 🗂️ Requirements: Minimum 4 years of experience in IT system development, Hands-on experience with .NET, especially .NET 8, Strong knowledge of PostgreSQL, Strong knowledge of MS SQL, Experience with Docker, Experience with Kubernetes, Practical experience in Agile software development, Experience in developing new features and maintaining existing systems, Good command of Polish, Legal right to work in the European Union 📃 Skills: .NET, C#, PostgreSQL, MSSQL, SQL, Docker, Kubernetes, Agile 🏢 Description: Ignite digital innovation — shape the future of online banking! Warszawa-based opportunity with hybrid work model (2 days in the office/month, up to 4 remote days/week). As a Senior .NET Developer , you will be working for our client, a leader in online banking, supporting the development and maintenance of secure, high-performance financial solutions. You’ll join a dynamic team dedicated to building cutting-edge banking functionalities, ensuring top-tier reliability and innovation. Operating within a distributed Agile environment, you’ll play a pivotal role in implementing complex backend logic while collaborating seamlessly across teams. This is your chance to contribute to transformative financial technology and accelerate your career growth. Your main responsibilities: Design and develop new features in .NET 8 to enhance banking solutions. Implement and optimize SQL-based data access for performance and security. Build and maintain containerized applications using Docker and Kubernetes. Collaborate with distributed teams within an Agile framework. Participate in the development of secure payment solutions. Share knowledge and mentor less experienced team members. Ensure code quality through reviews and testing. Maintain existing functionalities and address production issues. Manage your time effectively while working remotely. You're ideal for this role if you have: At least 4 years of experience in IT system development. Solid hands-on experience with .NET (especially .NET 8). 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 responsibilities. Experience developing new features and maintaining existing ones. Passion for software development and continuous learning. Experience with Docker and Kubernetes. It is a strong plus if you have: (optional) Certifications in relevant technologies. Experience with financial or payment systems. Language Required for the role: Good command of Polish. Eligibility to work on this role: Only candidates with an existing legal right to work in the European Union will be considered for this role. #MAKEYourCareerBETTER Interested? Apply now and include your CV (preferably in English) along with a statement confirming your consent to the processing and storage of your personal data.

🏢 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.