Senior Full Stack Engineer - .Net/React.js
First seen by Alion on Oct 27, 2026.
Role Overview :
Hiring a Senior Full Stack Engineer to design, build, and operate secure, scalable products and integrations across our global mobility platform.
You will deliver hands-on engineering across Next.js and React front ends and C# and .NET services running on Microsoft Azure, operating in a regulated, global environment.
What You Will Do :
- Build and evolve modern web experiences using Next.js, React, and TypeScript with a focus on performance, reliability, and usability.
- Design and implement backend services and APIs using C#, .NET, and WebAPI, including integrations that support payroll, tax, and immigration workflows.
- Deliver Azure-native implementations using Microsoft PaaS services, secure patterns, and operational best practices.
- Design and implement AI-powered features within products including prompt engineering, LLM integration, retrieval-augmented generation (RAG) patterns, and AI-assisted user workflows.
- Use agentic development practices including agent-driven development with Claude Code, Codex, or similar AI coding agents to accelerate design, implementation, testing, and operations.
- Own production readiness including logging, monitoring, alerting, and incident response.
Tech Stack & Requirements :
- 5+ years professional software development experience building enterprise web applications.
- Strong experience with Next.js, React, and TypeScript.
- Strong backend development experience in C# and .NET (ASP.NET, WebAPI).
- Proven experience with Microsoft Azure PaaS services.
- Experience delivering systems in regulated or compliance-oriented environments.
- Experience with agentic or AI-assisted development workflows (e.g., Claude Code, Codex).
- Bachelor's degree in Computer Science, Engineering, or related field required.
Skills
Full Stack, .Net, C#, API, WebAPI, Azure, AI Integration, React.js, Next.js