Senior.NET Developer Blazor UI focus

pbMission Overview: /b /p pJoin Keystone Solutions as a Senior .
NET Developer (Blazor, UI focus) on a consultancy mission at a client site. You will play a crucial role in building the future of public health technology, directly supporting digital services that enhance the health and wellbeing of millions. Your expertise will be essential in designing and delivering secure, accessible, and high-impact business applications, from the Blazor user interface to the .
NET services behind it. /p pbKey

Responsibilities:
/b /p ul liProvide technical leadership for the user interface, promoting a consistent approach to UI architecture and coding standards. /li liDedicate significant time to hands‑on development of features, reusable components, and technical improvements using C#, modern .
NET, Blazor, and Razor components. /li liDesign scalable and maintainable front‑end structures that align with architectural principles. /li liBuild responsive user interfaces that meet accessibility standards and ensure usability across devices. /li liCollaborate with analysts and UX stakeholders to clarify requirements and translate them into robust technical solutions. /li liIntegrate Blazor applications with REST APIs and ensure secure authentication and authorization flows. /li liMaintain high code quality through structured reviews and testing practices. /li liUtilize Git and Azure DevOps for version control and CI/CD pipelines. /li liCoach and share knowledge with other developers, fostering a culture of technical excellence. /li liLead troubleshooting efforts for complex issues across development and production environments. /li liEvaluate and recommend relevant technologies that align with architectural and security decisions. /li /ul pbKey Technical Expertise: /b /p ul liAdvanced proficiency in C# and modern .
NET development practices. /li liHands‑on experience with Blazor applications and component lifecycle management. /li liStrong command of HTML, CSS, and responsive design. /li liPractical experience with web accessibility standards (WCAG 2.1 level AA). /li liProven experience with REST APIs and JSON exchanges. /li liExperience implementing secure authentication using OAuth 2.0 and OpenID Connect. /li liWorking proficiency with Entity Framework Core and SQL. /li liStrong experience with unit testing and automated UI testing. /li liAdvanced use of Git and Azure DevOps. /li liKnowledge of AI-assisted development practices. /li /ul pbKey Soft

Skills:
/b /p ul liTechnical leadership and mentorship abilities. /li liEffective collaboration in a multidisciplinary environment. /li liStrong problem‑solving and decision‑making skills. /li liUser‑focused approach to digital experiences. /li liClear communication of complex technical matters. /li liResilience and adaptability to changing technologies. /li liCommitment to continuous improvement and professional development. /li /ul pbDuration: /b 23/11/2026
- 31/12/2026 2 months (full time) /p pbSkills required: /b /p ul libAgile / Scrum /b
- Level: Confirmed
- Most recent: Any time /li libAI-assisted development (GitHub Copilot, Claude Code or similar) /b
- Level: Junior
- Most recent: Any time /li libBlazor and Razor components, including Blazor Web App render modes /b
- Level: Junior
- Most recent: Any time /li libC# /b
- Level: Confirmed
- Most recent: Any time /li libEntity Framework Core and SQL /b
- Level: Confirmed
- Most recent: Any timebGit, Azure DevOps and CI/CD pipelines /b
- Level: Confirmed
- Most recent: Any time /li libHTML, CSS and responsive design /b
- Level: Confirmed
- Most recent: Any time /li libModern .
NET / ASP.
NET Core /b
- Level: Confirmed
- Most recent: Any time /li libOAuth 2.0 and OpenID Connect, JWT, claims-based authorisation /b
- Level: Confirmed
- Most recent: Any time /li libREST APIs and JSON exchanges /b
- Level: Confirmed
- Most recent: Any time /li libTesting: unit, component, integration and UI automation /b
- Level: Confirmed
- Most recent: Any time /li libWeb accessibility, WCAG 2.1 AA /b
- Level: Junior
- Most recent: Any time /li /ul pbLanguage

requirements:
/b /p pDutchbr/Level Active knowledgebr/Englishbr/Level Active knowledgebr/Frenchbr/Level Active knowledge /p