Senior Front End Developer (React.js)

Senior Front-End Developer (React.js)

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Front-End Developer (React.js) based in United States.
This is a high-impact senior engineering role focused on building scalable, performant, and modern web applications within the financial services and fintech space. You will contribute to complex, enterprise-grade digital platforms used by credit unions and banking clients, working across both frontend and backend systems. The role requires strong architectural thinking, deep React expertise, and the ability to navigate full-stack environments involving Java,.NET, and Node.js. You will collaborate with distributed, cross-functional teams to deliver seamless user experiences backed by reliable APIs and cloud-native infrastructure. The environment is fast-paced, Agile-driven, and centered on engineering excellence, quality delivery, and continuous improvement. This position is ideal for a senior technologist who thrives in solving complex integration challenges while maintaining a strong focus on performance and usability.
Accountabilities:

Lead the development and delivery of scalable, high-performance web applications across complex financial and fintech ecosystems.
Build and maintain responsive, enterprise-grade web applications using React.js, TypeScript, HTML5, and CSS3
Architect modular, reusable, and scalable frontend and full-stack code structures
Integrate diverse backend services and APIs across Java (Spring Boot),.NET Core (C#), Node.js, and Python systems
Translate UI/UX prototypes into pixel-perfect, accessible, and high-performance interfaces
Optimize application performance across frontend and backend layers, ensuring reliability and speed
Lead code reviews, enforce engineering best practices, and mentor intermediate developers
Collaborate in Agile/SCRUM environments and contribute to continuous delivery improvements
Ensure seamless system integration, data flow, and cross-platform compatibility across cloud-native environments
Requirements:

10+ years of experience in full-stack or front-end-heavy development, including at least 3 years in a senior or lead role. Strong expertise in React.js and modern web technologies is essential, along with proven experience in complex, multi-stack environments.
Expert-level proficiency in React.js, TypeScript, HTML5, and CSS3 (Sass/LESS)
Strong backend experience across Java (Spring Boot),.NET Core (C#), and Node.js
Solid understanding of RESTful APIs and GraphQL design and integration
Hands-on experience with Azure cloud services (App Services, Functions, Key Vault, etc.)
Strong experience with Python in modern web or backend development contexts
Deep knowledge of testing frameworks such as Jest, Mocha, xUnit, or JUnit with a test-first mindset
Experience working in professional services or consulting environments with client-facing responsibilities
Strong system design skills and ability to work across distributed architectures
Bachelor's degree in Computer Science, Software Engineering, or equivalent experience
Canadian citizenship or permanent residency required
Experience in fintech, banking, or credit union projects is a strong asset
Familiarity with multi-cloud environments (AWS, GCP) or mobile development (React Native) is a plus
Benefits:

Competitive hourly rate: CAD $60–$90/hour, based on experience and location
Fully remote-first contract opportunity
Comprehensive medical, dental, and extended health coverage (for eligible full-time employees)
Employee bonus programs and performance incentives
Collaborative, high-performing engineering culture
Exposure to large-scale fintech and digital banking transformation projects
Team-bonding activities and professional development opportunities
Work with modern cloud-native and distributed system architectures