Years Experience
Enterprise customers
Completed Projects
Positive feedback
Professional Summary
Microsoft Certified Senior .NET Developer with 25+ years of experience designing and developing enterprise software solutions using C#, ASP.NET Core, Azure and SQL Server.
Experienced in modernizing legacy applications, building cloud-native systems and delivering business-critical solutions for international organizations.
About me
Hi, I'm Petr Nejedlý, a Microsoft Certified Senior .NET Developer with more than 25 years of experience designing, developing and maintaining enterprise software solutions.
I specialize in building reliable web applications and backend systems using C#, .NET, ASP.NET Core, Azure and SQL Server. Throughout my career, I've worked on projects ranging from traditional ASP.NET Web Forms applications to modern cloud-native solutions built on Microsoft Azure with REST APIs, Azure Functions, Blazor and distributed services.
During the past two decades, I have contributed to software projects for international companies in telecommunications, banking, insurance, automotive and public sectors. I enjoy transforming complex business requirements into maintainable, scalable software that delivers real value to both customers and end users.
My experience extends beyond software development alone. I have participated in requirements analysis, technical design, solution architecture, code reviews, production support and direct communication with customers and business stakeholders. Understanding the business behind the software has always been just as important to me as writing clean, maintainable code.
Although my primary expertise is backend development, I am also comfortable working across the full web application stack when needed. I have extensive experience with HTML, CSS, and Bootstrap, enabling me to build complete web applications while keeping my main focus on server-side architecture, APIs, databases and business logic.
Technology evolves rapidly, and I genuinely enjoy learning. Over the years I have successfully adapted through multiple generations of Microsoft technologies, from classic ASP and ASP.NET Web Forms to ASP.NET Core, Razor Pages, Blazor and Microsoft Azure. I believe that solid software engineering principles remain valuable regardless of the framework or technology currently in use.
I am known for being reliable, analytical and detail-oriented. I take pride in writing clean, well-structured code, carefully considering edge cases, and delivering solutions that are easy to maintain and extend. Colleagues appreciate that I approach problems methodically, communicate openly and always strive to find practical, long-term solutions rather than quick fixes.
Whether joining an existing team or starting a new project, my goal is always the same: to help build software that is robust, maintainable and delivers measurable business value.
AI-Driven Development for Competitive Advantage: I actively leverage modern AI tools to deliver projects faster and more efficiently without sacrificing quality or control. GitHub Copilot accelerates intelligent code completion and in-editor development, reducing boilerplate and common patterns. OpenCode serves as my agentic assistant for complex refactoring, architectural improvements, and large-feature implementation. OpenSpec enables spec-driven development, transforming complex business requirements into well-structured technical specifications before development begins. This strategic use of AI means you benefit from faster delivery timelines, higher code quality, and better problem-solving — while I maintain complete ownership of all architectural decisions, design patterns, and technical strategy. I don't use these tools to cut corners; I use them to work smarter, stay current with industry practices, and give you more value.
Technologies and tools I am familiar with
.Net, .Net Framework, .Net Core, .Net Standard, .Net 10, C#, ASP.NET, ASP.NET Web Forms, ASP.NET MVC, ASP.NET Web API, Razor Pages, Blazor server, Blazor webassembly, REST API, JSON, SOAP, XML, ASP, IoC, DI, Autofac, Automapper, Dapper, Serilog, xUnit, SQL, SQLite, SQL Server, T-SQL, Stored procedures, TFS, Git, GitHub, Azure, Azure DevOps, Azure CI-CD, IaaC, Bicep, Azure App Services, Azure Functions, Azure Service Bus, Azure Blob Storage, Azure Key Vault, Private Endpoints, Triggers, Windows Server, Visual studio, GitHub Copilot, OpenCode, OpenSpec, Jira, Confluence, Teams, Agile, Google Analytics, HTML, HTML5, Sitecore, Kentico Xperience, Kontent.ai.
Recruit the attitude, skills can be taught!
I usually have very good relationships with colleagues and clients. Easy-going communication is a valuable asset I always handle with the greatest care.
If you feel that I might be a good fit for your team but you think there are some important skills missing on my list, I can learn quickly.
The way of work I am perfectly used to
- Using Microsoft Visual Studio 2022 for the C# backend development.
- Using Microsoft SQL Server Management Studio for the database logic development.
- Using Github, TFS (Team Foundation Server), or Azure DevOps for code versioning and deployments.
- Using Atlassian Jira or Trello for issue tracking.
- Using Atlassian Confluence for writing documentation.
- Integrating AI-assisted development (GitHub Copilot, OpenCode, OpenSpec) into the development lifecycle to accelerate delivery, improve code quality, and enhance solution architecture.
- Following the Agile project methodology.
What I am looking for
I prefer long-term projects with the possibility to work fully remotely. I thrive in small, agile, English-speaking teams, whether at a digital agency or an in-house product company.
Clients
Here is the list of clients I have worked for, both directly and indirectly as a subcontractor.
- T-Mobile
- Prague Boats
- SCHOTT AG
- GEALAN Fenster-Systeme GmbH
- Postillion Hotels B.V.
- La Lorraine, Inc.
- Raiffeisen - Leasing
- Allnex
- Pietro Filipi
- BMW Group
- Komerční pojišťovna
- Komerční banka
- The Academy of Performing Arts in Prague
- Nationale-Nederlanden Life Insurance
References
If you have a professional obligation to your client and need to reference every candidate you submit to them, here are some contacts you may want to reach out to.
- Miroslav Beneda
Former superior at T-Mobile
https://www.linkedin.com/in/miroslav-beneda-776b03224/ - Jan Pomahač
Former colleague at T-Mobile
https://www.linkedin.com/in/pomahac/ - Michael Sido
Former business partner at T-Mobile
https://www.linkedin.com/in/michael-sido-b100b44/ - Simona Kašturová
Former business partner at T-Mobile
https://www.linkedin.com/in/simonakasturova/ - Tereza Gutierrez
Former superior at ACTUM Digital
https://www.linkedin.com/in/terezagutierrez/ - Ondrej Zubec
Former superior at ACTUM Digital
https://www.linkedin.com/in/ondrejzubec/ - Václav Novák
Former superior at ACTUM Digital
https://www.linkedin.com/in/v%C3%A1clav-nov%C3%A1k-8178a693/ - Jindřich Piroutek
Former colleague at ACTUM Digital
https://www.linkedin.com/in/jindrichpiroutek/ - Filip Zeman
Former colleague at ACTUM Digital
https://www.linkedin.com/in/filip-zeman-8620b937/ - Gianluca Turturro
Chief Solutions Officer at ACTUM Digital
https://www.linkedin.com/in/gianlucaturturro/ - Jan Havel
Co-Founder and Chief Strategy Officer at ACTUM Digital
https://www.linkedin.com/in/janhavel/ - Thijs Wolters
Former superior at Nationale-Nederlanden
https://www.linkedin.com/in/thijs-wolters-2a88a521/ - Gabriel Balogh
Former superior at Nationale-Nederlanden
https://www.linkedin.com/in/gabrielbalogh/
Certifications
MCSD: App Builder
MCSA: Web Applications
MCSA: Universal Windows Platform
MCP
Sitecore CPAD
Kentico
Work History
NN Group (Nationale-Nederlanden) Insurance company
I was responsible for working on an enterprise application that processes information about incoming and outgoing payments. The application is a set of applications, including an asp.net core web api application, Blazor webassembly front-end application, and an Azure Functions application, and is hosted in Microsoft Azure, leveraging other Azure resources, such as Microsoft SQL Server, Blob storages, Service Bus, Vnets, Subnets, Private endpoints, etc.
My responsibilities included designing, developing, testing, and deploying new features and enhancements to the application, maintaining the existing codebase, collaborating with other developers and stakeholders to identify and resolve technical challenges, troubleshooting and resolving production issues, and staying up-to-date with the latest technologies, trends, and best practices in full-stack development and Azure serverless applications.
ACTUM Digital
Working on large-scale implementations of Experience Management and Commerce technologies by leading vendors Sitecore and Kentico, powered by Microsoft Azure.
Working for both international and local enterprise clients including SCHOTT AG, GEALAN Fenster-Systeme GmbH, Postillion Hotels B.V., La Lorraine, Inc., Raiffeisen - Leasing, Allnex, Pietro Filipi, BMW Group, Komerční pojišťovna and Komerční banka.
T-Mobile Czech Republic a.s.
Independent architecture design and development of the tailor-made Intranet portal, its Content Management System, and extensive intranet web applications using ASP.NET (C#) and MSSQL or Oracle.
Authoring various APIs for communication with other systems, e.g. SMS Center, TIBCO, TIP, IVR, Genesys, GIS, Facebook Workplace, etc.
Experience with the full software development lifecycle, from the initial meetings with customers, identifying their needs, solution proposals, through the architecture design, development, and testing, to the final handover, training, and subsequent support.
T-Mobile Czech Republic a.s.
Analysis and development of tailor-made application systems and services using ASP.NET (C#) and MSSQL or Oracle. Cooperation with suppliers during the implementation of applications and services, support of the current applications and systems.
Altermedia
Altermedia is a small digital agency based in Prague, Czech Republic, focusing on production of websites and e-commerce applications, creating text and multimedia content, and managing social networks.
Altermedia helps individuals, small and large companies in their growth, increasing their traffic and sales.
My responsibilities are business consultancy, project management, software design and architecture.
See altermedia.cz
Atlas Česka
Atlas Česka (Czech Atlas) is one of the largest and most recognizable free time activity websites in the Czech Republic with approximately 12.000 unique visitors every day.
My responsibilities are relationship management, business development, contracts negotiation and team management. In the past year I have been in charge of redesigning the website with more than 150 000 content pages (1.000+ working hours).
See atlasceska.cz