Senior Frontend Engineer (React) at Nix

Company Overview Our client is a leading, fully regulated US-based digital asset trading platform. They provide secure, low-latency access to cryptocurrency markets, acting as a bridge between traditional finance and the Web3 ecosystem. About This Role The Senior Software Engineer, Web is part of the Engineering team and reports to our Manager, Engineering. As a Senior Software Engineer, Web, you will be responsible for designing and building scalable, high-performance web applications using Next.js and modern front-end technologies. You will partner with Product, Design, Backend, and DevOps teams to deliver performant, accessible, and secure user experiences while contributing to front-end architecture and engineering best practices. Key Responsibilities • 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. • Contribute to front-end architecture decisions and engineering best practices. • 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). Required Qualifications • 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 mind set. • 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. • Bonus: Experience with analytics instrumentation or blockchain-integrated front-ends (e.g.,ethers.js, wallet integrations). We offer*: • Flexible working format - remote, office-based or flexible • A competitive salary and good compensation package • Personalized career growth • Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more) • Active tech communities with regular knowledge sharing • Education reimbursement • Memorable anniversary presents • Corporate events and team buildings • Other location-specific benefits *not applicable for freelancers