Senior React Developer

Weekday AI; Delhi; On-site; INR 700,000 - 3,500,000; Full time

Job summary

Weekday AI is seeking an experienced Senior React Developer in India to design, develop, and maintain scalable web applications using React.js, JavaScript/TypeScript, C#/.NET, and ASP.NET Core/Web API. This full-time role demands strong full-stack capabilities and collaboration with product, QA, and DevOps.

You will contribute to architecture, performance optimization, testing, and production support, mentoring junior engineers and driving best practices across the stack.

Qualifications

• 8+ years of professional software development experience.
• Strong proficiency in React.js and modern frontend development.
• Backend development using C# and .NET with ASP.NET Core.
• Experience designing and consuming REST APIs and integrating frontend and backend systems.

Responsibilities

• Design, develop, and maintain scalable web applications using React.js.
• Build reusable React components, hooks, services, state-management solutions, and frontend modules.
• Design and integrate backend services using C#, .NET, ASP.NET Core, and Web API.
• Develop and maintain robust RESTful APIs and application integrations.
• Work with MS SQL Server to design data-driven solutions and optimise queries.
• Translate requirements into scalable, maintainable software solutions.
• Participate in architecture and technical design discussions.
• Apply clean coding practices; adhere to SOLID principles.
• Develop and run unit and integration tests across frontend and backend.
• Perform code reviews and ensure security, quality, and reliability.

Skills

React.js

JavaScript

TypeScript

C#

.NET

ASP.NET Core

Web API

REST APIs

MS SQL Server

Unit testing

Integration testing

Git

CI/CD

Agile/Scrum

Education

Bachelor's degree in Computer Science, Information Technology, Engineering, or a related discipline

Tools

Git

CI/CD

Job description

This role is for one of the Weekly's clients

Salary range: Rs 700000 - Rs 3500000 (ie INR 7-35 LPA)

Experience: 8+ yrs

Location: India

Job Type: Full-time

We are looking for an experiencedSenior React Developer to design, develop, and maintain scalable, high-performance web applications usingReact.js, JavaScript/TypeScript, C#/.NET, and ASP.NET Core/Web API.

The ideal candidate will be a strong full-stack engineer with deep expertise in modern frontend development and solid backend experience across the .NET ecosystem. You will contribute to technical design, application architecture, development, testing, performance optimisation, and production support while working closely with product, engineering, QA, and other cross-functional teams.

Key Responsibilities

• Design, develop, test, and maintain scalable web applications usingReact.js.
• Build responsive, reusable, and high-performance user interfaces usingJavaScript and TypeScript.
• Develop reusable React components, hooks, services, state-management solutions, and frontend modules.
• Design and integrate backend services usingC#, .NET, ASP.NET Core, and Web API.
• Develop and maintain robustRESTful APIsand application integrations.
• Work withMS SQL Serverto design data-driven solutions, write efficient queries, and optimise database performance.
• Translate functional and technical requirements into scalable, maintainable software solutions.
• Participate in application architecture and technical design discussions.
• Apply clean coding practices, object-oriented programming principles, design patterns, and SOLID principles.
• Develop comprehensiveunit and integration testsacross frontend and backend components.
• Perform code reviews and ensure adherence to engineering, security, and quality standards.
• Troubleshoot complex application issues and conduct root-cause analysis.
• Optimise application performance, scalability, responsiveness, and reliability.
• Collaborate with Product Managers, UI/UX teams, QA engineers, DevOps, architects, and other stakeholders.
• Support application deployment, production releases, monitoring, and issue resolution.
• Identify opportunities for refactoring, automation, technical debt reduction, and engineering process improvements.
• Contribute to technical documentation, coding standards, development guidelines, and knowledge-sharing initiatives.
• Mentor junior and mid-level developers and provide technical guidance when required.

What Makes You a Great Fit

• 8+ years of professional software development experience with strong hands-on expertise in full-stack web application development.
• Strong proficiency inReact.jsand modern frontend development.
• Advanced knowledge ofJavaScript and TypeScript, including modern ES6+ concepts.
• Strong backend development experience usingC# and .NET.
• Hands-on experience withASP.NET Core and Web APIfor building scalable backend services.
• Strong experience designing and consumingREST APIsand integrating frontend and backend systems.
• Solid experience working withMS SQL Server, including SQL queries, database design, optimisation, and troubleshooting.
• Strong understanding of software architecture, object-oriented programming, design patterns, SOLID principles, and clean code.
• Proven experience implementingunit testing and integration testingacross application components.
• Strong debugging, performance optimisation, problem-solving, and root-cause analysis skills.
• Experience with Git and modern software development and CI/CD workflows.
• Good understanding of application security, scalability, reliability, and production support practices.
• Experience working in Agile/Scrum development environments.
• Strong communication and collaboration skills with technical and non-technical stakeholders.
• Ability to independently own complex technical deliverables while contributing effectively to a collaborative engineering team.
• Bachelor's degree in Computer Science, Information Technology, Engineering, or a related discipline is preferred.