Sr Full Stack Developer (React/.Net)

Company: Top Prospect Group, Inc.
Location: White Plains
Posted on: February 22, 2026

Job Description:

Job Description Job Description ESSENTIAL FUNCTIONS: Participate in the entire application lifecycle, including design, development, testing, deployment, and debugging. Develop and maintain modern Single Page Applications (SPA) using: React 18 / Vite (build tool and dev server) / Folder directory–based routing with react-router-dom Implement schema validation using Zod . Manage client-side application state using Zustand . Implement internationalization using react-i18next . Develop responsive, accessible UI components using Tailwind CSS . Build interactive data visualizations using Apache ECharts . Implement date formatting and manipulation using date-fns . Maintain code quality and consistency using ESLint and established linting rules. Build reusable, scalable component libraries and shared utilities. Optimize application performance and bundle size. Programs within multiple inter-related systems using C#, Web API, JSON. Designs, writes, validates, and modifies efficient and maintainable code. Designs SQL Server database tables to support project requirements. Writes efficient SQL queries to support data gathering requirements. Collaborates with cross-functional teams to conceptualize and develop new web applications. Develops and executes effective testing strategies. Creates and maintains documentation related to assigned web applications and systems. Tracks and reports project progress to supervisor. TECH STACK (PRIMARY) Front-End React 18 Vite Zod Zustand react-i18next react-router-dom (folder directory–based routing) Tailwind CSS Apache ECharts date-fns ESLint Back-End C# .NET 6 Web API JSON SQL Server NHibernate LINQ MINIMUM QUALIFICATIONS AT ENTRY: Extensive experience with React 18 and modern SPA architecture . Hands-on experience with Vite-based projects . Strong experience with client-side state management (Zustand or similar). Experience implementing schema validation (Zod or similar libraries). Experience implementing internationalization frameworks (react-i18next or equivalent). Experience building responsive applications using Tailwind CSS or similar utility-first frameworks. Experience implementing interactive data visualizations (ECharts or similar). Strong understanding of folder-based routing patterns using react-router-dom. Familiarity with date manipulation libraries (date-fns or similar). Proven work experience as a full stack developer. In-depth understanding of the entire web development lifecycle (design, development, deployment). Strong knowledge of Visual Studio, .NET 6, Web API, Git, NHibernate, LINQ, JSON, SQL. Experience with Git workflows (branching, pull requests, merging). Agile development experience preferred. Test Driven Development (TDD) experience preferred Company Description Top Prospect Group founders and management team offer more than 25 years of experience in Information Technology and Creative Staffing. Our fundamental goal is to build successful relationships resulting in accurate job and prospect representations. Top Prospect Group meets with those we work with face-to-face to garner a better understanding of candidate or client requirements. By leveraging our experience and market insight, we are then able to provide a more consistent recruitment process. Company Description Top Prospect Group founders and management team offer more than 25 years\r\n of experience in Information Technology and Creative Staffing. Our fundamental goal is to build successful relationships resulting in accurate job and prospect representations. Top Prospect Group meets with those we work with face-to-face to garner a better understanding of candidate or client requirements. By leveraging our experience and market insight, we are then able to provide a more consistent recruitment process.

Keywords: Top Prospect Group, Inc., West Haven , Sr Full Stack Developer (React/.Net), IT / Software / Systems , White Plains, Connecticut