Principal React Developer - Onsite Job Springfield area,Missouri USA,Software Development

Principal React Developer (Ecommerce Front-End Platform)

We are seeking a Principal React Developer to join our growing team and lead the development of modern, scalable, and high-performing front-end applications for our eCommerce platform. This role serves as a hands-on technical leader, driving complex engineering initiatives, influencing architectural decisions, and partnering with cross-functional teams to deliver exceptional digital customer experiences.

The Principal React Developer works closely with stakeholders to understand business requirements and translates them into robust, scalable front-end solutions. This role is responsible for advancing platform capabilities, driving modernization, optimizing performance, and mentoring engineering teams while remaining deeply involved in design and development.

This is an onsite position that is required to be based in Springfield, Missouri.

Essential Functions:

Design, develop, and deliver enterprise-scale front-end applications using React.js and Next.js (SSR/SSG/ISR). Serve as a hands-on technical leader, contributing to critical code paths while guiding engineering direction.
Lead implementation of micro-frontend architectures (Module Federation, Single-SPA) to enable scalability and team autonomy.
Drive front-end platform upgrades including React migrations, Next.js upgrades, and adoption of modern tooling such as React Compiler.
Build and enforce reusable, scalable component libraries and design system standards.
Implement page composition and stitching strategies across micro-frontends to create seamless user experiences.
Develop and integrate with RESTful and/or GraphQL APIs, ensuring efficient data flow and rendering strategies.
Influence and guide decisions on state management, routing, and data-fetching patterns (Redux, Recoil, etc.).
Lead performance optimization initiatives, including code splitting, lazy loading, memoization, React Compiler optimizations, SSR/edge rendering, and runtime improvements.
Design and implement advanced caching strategies using browser caching, CDN caching, ISR, edge caching, and tools like Varnish to improve scalability and response times.
Ensure cross-browser compatibility, mobile responsiveness, and compliance with accessibility (WCAG) standards.
Apply and promote secure coding practices (XSS, CSRF mitigation, data protection).
Drive testing strategy and implementation using Jest, React Testing Library, Cypress, or similar tools.
Monitor, analyze, and improve front-end performance and observability using tools like Lighthouse and Core Web Vitals.
Collaborate with Dev Ops teams to support containerized deployments using Docker and Kubernetes for front-end applications.
Establish and promote best practices for micro-frontends, code quality, and engineering standards.
Mentor developers, perform code reviews, and elevate overall team capability and code quality.
Collaborate cross-functionally with product, UX, backend, and Dev Ops teams to deliver end-to-end solutions.
Actively participate in Agile workflows and contribute to continuous delivery and engineering excellence.
Evaluate and introduce emerging technologies and innovations into the front-end ecosystem.
Lead initiatives focused on performance, scalability, modernization, and developer experience improvements.
All other duties as assigned

Experience/

Qualifications:

Minimum degree required:
Bachelor's degree in Computer Science, Engineering, or related discipline is required.
12+ years of experience in front-end development, with strong expertise in React.js.
Minimum 8+ years of experience with Next.js, Micro-Frontends, and modern front-end architectures.
Strong proficiency in JavaScript (ES6+), Type Script, HTML5, CSS3, SCSS.

Knowledge, Skills, and Ability:

Deep expertise in modern React concepts such as Hooks, Context API, functional components, and performance optimization techniques.
Hands-on experience with React upgrades, dependency management, and adoption of emerging features such as React Compiler.
Proven experience building and scaling micro-frontend architectures (Module Federation, Single-SPA, or similar).
Strong understanding of page orchestration, composition,…