Senior Full-stack Developer (.NET / React)

Senior Full-stack Developer (.NET / React)

Our client, a US healthcare nonprofit, is building a clinical application that turns AI-generated risk predictions into timely action. Frontline and clinical staff get alerts on their phones and tablets when a participant is identified as being at elevated risk. They can review the participant's recent history and record the actions they took, while supervisors monitor follow-ups and manage escalations.The product handles protected health information (PHI), runs on Microsoft Azure and is built with an AI-first approach, so you'll use AI coding tools as part of your daily workflow.EngagementStart: ASAPDuration: up to 4 months, with a possible extension for ongoing supportMonth 1, discovery phase: up to 60 hoursMonths 2 to 4, development phase: full-time, about 160 hours per monthWorking hours: Mon to Fri, with at least 4 hours of overlap with the team's 9:00 to 17:00 ESTMust-have skillsExperience: 5+ years of commercial full-stack developmentBack end: C#, .NET, ASP.NET Core Web API, Entity Framework Core, PostgreSQL, REST API design and developmentFront end: TypeScript, React.js, Vite and Tailwind CSS; responsive, mobile-first interfaces; accessibility standards (WCAG)Security: authentication and authorization with OAuth2 / OpenID Connect and SSOQuality: automated unit, integration and end-to-end testing; Git and CI/CD workflowsAI-assisted development: hands-on daily use of tools such as Claude, Codex or similarEnglish: upper-intermediate or higherNice to haveHealthcare or another regulated industry, particularly HIPAA requirementsProgressive web apps (PWA) and offline-first solutionsMicrosoft AzureHiring processHR interview.Technical interview with the team.If needed, a final conversation to align on the last details.