Senior Full-Stack (React and C#)
First seen by Alion on Oct 7, 2026.
Our Customer:
Our customer develops specialized software products for professional business workflows. The engineering team works on established production applications and is looking for a full-stack engineer who can contribute across both frontend and backend development.
Your Tasks:
Develop and maintain full-stack applications across React/TypeScript frontend and C# backend.
Work on medium and large-scale production applications throughout the development lifecycle.
Develop and maintain frontend functionality using React, including both Hooks and class-based components.
Build and maintain backend functionality using ASP.NET MVC and Web API on the classic .NET Framework.
Investigate, debug, trace, and resolve complex frontend and server-side issues.
Apply software engineering principles, design patterns, and clean development practices.
Quickly learn and adopt new technologies when required.
Work independently while contributing across the full technology stack.
Required Experience and Skills:
3+ years of experience working with medium or large-scale React applications.
2+ years of experience working with medium or large ASP.NET MVC or Web API applications.
Strong knowledge of React Hooks and classic class-based components.
Strong TypeScript skills.
Good understanding of core web technologies, including JavaScript, XHTML, and CSS.
Production experience with Redux, Redux Saga, and Immutable.js.
Strong frontend debugging and problem analysis skills.
Hands-on experience with the classic .NET Framework; working experience with .NET Core is not required, but solid knowledge of .NET Core is required.
Strong knowledge of C#, OOP, SOLID principles, design patterns, reflection, and algorithms.
Strong understanding of XML and JSON serialization.
Ability to debug, trace, and resolve complex server-side issues.
Strong ability to learn new technologies quickly and work independently.
University degree in Computer Science or a related field, or equivalent industry experience.
Excellent English.
Would Be a Plus:
Experience with AWS services such as SQS, EKS, and Fargate.
Experience with cloud-oriented systems.
Experience with Kubernetes.
Experience with Node.js.
Knowledge of nw.js or similar technologies.