Senior Frontend Developer (React.js & TypeScript) LTI

An empty job that is used foAt Sequoia Connect, we are a Talent-First Technology Ecosystem that redefines how elite professionals interact with the global digital landscape. We move beyond traditional models to act as a catalyst for the top 1% of global talent, connecting human potential with complex industrial execution. By joining our network, you are not simply taking a position; you are aligning with a strategic partner dedicated to updating your "Human OS" and accelerating your growth through world-class, high-impact projects.

We are currently partnering with a global technology consulting and digital solutions powerhouse that empowers more than 750 clients to succeed in a converging world. As a USD 3.4 billion organization with a workforce of 90,000+ professionals across five continents, our client is a recognized leader in the industries that drive economic growth, including Construction, Finance, and Technology. They are renowned for accelerating digital transformation through their proprietary Mosaic platform, enabling advanced journeys in IoT, cloud, social, and analytics for global customers.

This is your chance to thrive in a culture that "goes the extra mile" and prizes innovation-led solutions. You will join an international network of expertise where you will gain exposure to large-scale digital transformations and high-impact projects that define the modern economy. If you are a driven professional looking for a stable, global stage and the opportunity to work with cutting-edge technologies alongside the world’s most talented consultants, this is where you belong.

We are currently searching for a Senior Frontend Developer (React.js & TypeScript)

We are seeking a Senior Frontend Developer (React.js & TypeScript) with 5 to 10+ years of hands-on experience to design and build high-performance, dynamic web applications. The ideal candidate has deep technical expertise in modern JavaScript/TypeScript, React workflows, state management, and performance optimization, alongside a solid understanding of web security and RESTful API integrations connected to Java Spring Boot microservices.

Key Responsibilities & Activities

• Architect, build, and maintain dynamic, resilient web applications using modern JavaScript (ES6+), TypeScript, and React.js.
• Design and implement complex front-end state management using Redux, Redux Toolkit, React Context API, and advanced React Hooks.
• Analyze and optimize front-end rendering, Virtual DOM reconciliation, memory usage, and loading times for maximum performance.
• Integrate complex front-end modules with back-end Java Spring Boot microservices; mock and debug REST APIs using Browser DevTools and network tools.
• Enforce client-side security best practices, including secure handling of authentication tokens, CORS policies, client-side data encryption, and XSS/CSRF prevention.
• Support automated front-end deployments by collaborating on cloud infrastructure (GCP / PCF / GKE) and CI/CD pipelines (GitHub Actions).
• Participate actively in Agile ceremonies (Scrum/Kanban), conduct code reviews, and maintain clean version control using Git.

Technical Requirements (Must to have)

• Experience: 5 to 10+ years of professional experience in dedicated Frontend Engineering.
• JavaScript Fundamentals & ES6+: Comprehensive knowledge of core JS mechanisms, closure, scope, asynchronous patterns (Promises, async/await), and modern ES6+ features.
• TypeScript Types & Interfaces: Deep, hands-on experience creating robust interfaces, custom types, generics, and enforcing strict typing standards.
• Advanced experience with standard/custom React Hooks and a deep understanding of component lifecycle execution.
• Proven mastery of Redux, Redux Toolkit, and React Context API for large-scale applications.
• API Integration & Debugging: Hands-on expertise in integrating RESTful endpoints and using Browser Dev Tools for troubleshooting, network analysis, and profiling.
• Performance Optimization & Virtual DOM: Deep understanding of reconciliation, rendering cycles, memoization, lazy loading, and bundle optimization.
• Web Security & Defensive Coding: Direct experience handling authentication tokens safely, configuring CORS, preventing XSS/CSRF attacks, and securing client-side data.

(Nice to have)

• Java / Backend Microservices Awareness: Familiarity with how Java Spring Boot microservices expose REST APIs to enable smooth cross-team communication, mock setup, and API debugging.
• Cloud & CI/CD Awareness: Basic exposure to cloud-hosted front-end architectures (GCP, PCF, or GKE) and CI/CD deployment pipelines (GitHub Actions).
• Modern Tooling & AI: Familiarity with AI developer assistance tools (e.g., GitHub Copilot, Claude).
• Version Control & Methodology: Proficiency with Git workflow and experience working within Agile frameworks (Scrum/Kanban).

Languages

• Advanced English

Remote

Requirements

• Experience: 5 to 10+ years of professional experience in dedicated Frontend Engineering.
• JavaScript Fundamentals & ES6+: Comprehensive knowledge of core JS mechanisms, closure, scope, asynchronous patterns (Promises, async/await), and modern ES6+ features.
• TypeScript Types & Interfaces: Deep, hands-on experience creating robust interfaces, custom types, generics, and enforcing strict typing standards.
• Advanced experience with standard/custom React Hooks and a deep understanding of component lifecycle execution.
• Proven mastery of Redux, Redux Toolkit, and React Context API for large-scale applications.
• API Integration & Debugging: Hands-on expertise in integrating RESTful endpoints and using Browser Dev Tools for troubleshooting, network analysis, and profiling.
• Performance Optimization & Virtual DOM: Deep understanding of reconciliation, rendering cycles, memoization, lazy loading, and bundle optimization.
• Web Security & Defensive Coding: Direct experience handling authentication tokens safely, configuring CORS, preventing XSS/CSRF attacks, and securing client-side data.
• Java / Backend Microservices Awareness: Familiarity with how Java Spring Boot microservices expose REST APIs to enable smooth cross-team communication, mock setup, and API debugging.
• Cloud & CI/CD Awareness: Basic exposure to cloud-hosted front-end architectures (GCP, PCF, or GKE) and CI/CD deployment pipelines (GitHub Actions).
• Modern Tooling & AI: Familiarity with AI developer assistance tools (e.g., GitHub Copilot, Claude).
• Version Control & Methodology: Proficiency with Git workflow and experience working within Agile frameworks (Scrum/Kanban).