Senior React Engineer

N-iX is looking for a Senior React Engineer to join the team. Our client is a leading, fully regulated US-based digital asset trading platform providing secure, low-latency access to cryptocurrency markets, acting as a bridge between traditional finance and the Web3 ecosystem.

• Bachelor’s or Master’s degree in Computer Science or related field
• 8 years of professional software engineering experience, or 6 with an advanced degree
• Strong communication and collaboration skills, motivation, problem solving mindset
• Strong proficiency in Next.js, React, TypeScript, JavaScript, HTML5, and CSS3
• Strong experience with GraphQL and REST API
• Experience with performance optimization tools (Lighthouse, WebPageTest, Chrome DevTools)
• Solid understanding of SSR/SSG, CDN strategies, caching, and responsive design principles
• Familiarity with front-end security best practices
• Experience with Git, CI/CD pipelines, and modern deployment workflows
• Exposure to cloud platforms such as AWS or GCP
• Strong collaboration skills working with Product, Design, and Backend teams
• Experience mentoring junior engineers and contributing to team development
• English level: Upper-intermediate or higher, sufficient for daily team communication and code review discussions

Nice to have:

• Experience with analytics instrumentation or blockchain-integrated front-ends (e.g., ethers.js, wallet integrations)

• Design and build scalable, high-performance web applications using Next.js and modern front-end technologies
• Partner with Product, Design, Backend, and DevOps teams to deliver performant, accessible, and secure user experiences
• Contribute to front-end architecture and engineering best practices
• Design and implement scalable front-end features using Next.js, React, and TypeScript
• Own end-to-end development of web features, including testing, deployment, and maintenance
• Build modular and reusable UI components to support scalable development
• Optimize web performance through SSR/SSG, lazy loading, and responsive design techniques
• Monitor and improve performance metrics such as page load time, TTI, and Core Web Vitals
• Collaborate cross-functionally with Product, Design, Backend, and DevOps teams to define requirements and deliver features
• Participate in code reviews and mentor junior engineers to improve code quality and team standards
• Partner with DevOps to support CI/CD pipelines and reliable deployment processes
• Ensure high standards in code quality, accessibility, security, and automated testing (unit, integration, E2E)