Hiring: Senior Full-Stack Developer (C#, ASP.NET, React) — Coimbatore | Vaanam Technology

ROLE-SPEC // FULL-STACK-DEV // COIMBATORE

Senior Full-Stack Developer, Coimbatore: .NET, C# and React on One Team

An onsite, permanent opening for an engineer who's equally comfortable in a C# backend and a React front end — not just one or the other.

Hiring Company — Vaanam Technology
Job Title
Senior Full-Stack Developer
Experience
3 – 8 Years
Work Mode
Onsite, Coimbatore
Employment Type
Permanent
Company
Vaanam Technology

About the role

Vaanam Technology is hiring a senior full-stack developer for a Coimbatore-based, on-premise engineering team working across the Microsoft stack and React. The role sits at the point where backend architecture decisions meet front-end delivery — you'll write the API, shape the data layer, and also touch the UI that consumes it. It suits someone with 3+ years of production experience who's tired of context-switching between "backend person" and "frontend person" roles and wants ownership of the full slice.

What you'll be doing

  • Build and maintain backend services using ASP.NET, .NET Core, MVC and Web API
  • Write and consume APIs that power a React-based front end
  • Design and optimize database queries for performance at scale
  • Join technical discussions to help shape how requirements get fulfilled
  • Give accurate effort estimates for your own tasks and work you delegate
  • Maintain and review code to a consistently high engineering standard
  • Mentor junior developers on the team through code reviews and pairing

Core tech stack

C# ASP.NET .NET Core MVC Web API React.js SQL

Role snapshot

CategoryDetails
Job TitleSenior Full-Stack Developer
Experience Required3 to 8 years, Microsoft stack + React
Must-Have SkillsC#, ASP.NET 3.0/4.0, MVC, Web API, React.js
Work ModeOnsite — Coimbatore office
Employment TypePermanent, full-time
Team ResponsibilityMentoring junior developers

Why join Vaanam Technology for this role

This isn't a narrow, single-layer engineering job. You get architectural input on the backend and a real say in how the React front end consumes what you build — which is a rare combination for a "senior developer" title that, at a lot of companies, really just means senior backend developer. If you want your full-stack skills to stay full-stack instead of slowly narrowing to one layer, this is worth a look.

Interview questions to prepare for this role

01
Walk through the request lifecycle in ASP.NET MVC.
Be ready to explain routing, controller action selection, model binding, and how the view gets rendered and returned to the client.
02
How is .NET Core different from the traditional .NET Framework?
Cover cross-platform support, performance improvements, modular NuGet-based packages, and how project configuration differs between the two.
03
How would you design a Web API endpoint that a React front end will consume?
Discuss RESTful resource naming, status codes, consistent error response shapes, and versioning so the frontend team isn't broken by backend changes.
04
How do you approach writing a high-performing database query?
Talk about indexing strategy, avoiding N+1 query patterns, execution plan review, and when to denormalize for read-heavy workloads.
05
How do you manage state and data fetching in a React app connected to a .NET backend?
Mention hooks (useState/useEffect), a data-fetching pattern (or library), handling loading/error states, and keeping API contracts predictable.
06
How do you estimate effort for a feature you haven't built before?
Explain breaking the feature into known sub-tasks, flagging unknowns explicitly, and padding estimates for integration and testing time, not just coding time.
07
How do you mentor a junior developer without slowing your own delivery down?
Talk about code review as teaching, pairing on tricky problems instead of just handing over solutions, and setting clear conventions so questions reduce over time.
Ready to apply for this Senior Full-Stack Developer role?

Have examples ready of production C# / .NET work paired with React features you've shipped — end-to-end ownership is exactly what this role is built around.

Apply Now

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