Senior Software Engineer building scalable, high - performance web applications for Binance.US, a regulated cryptocurrency exchange. Leading front - end architecture, performance optimization, testing, and secure user experiences with Next.js and React.
About the role
- Senior Frontend Developer at GR8 Tech architecting scalable web interfaces for the iGaming industry. Mentoring engineers and ensuring adherence to UI/UX best practices in a global team.
Responsibilities
- Architect scalable and maintainable front-end solutions using React, modern JavaScript, and TypeScript.
- Drive the adoption of efficient state management and modular build processes (e.g., Webpack, module federation).
- Design resilient, failure-tolerant systems that account for load, performance, and web security (CORS, CSP, OWASP).
- Ship complex, high-quality code to production in a timely manner to meet crucial business expectations.
- Optimize web pages for maximum speed and scalability by deeply tuning the event loop and rendering steps (style, layout, paint, composite).
- Validate code reliability by building out comprehensive testing infrastructure (Jest, React Testing Library, unit/integration testing).
- Mentor junior developers and elevate team standards through thorough, constructive code reviews.
- Partner with Product Managers, Designers, and Delivery Managers to align technical execution with overarching business goals.
- Unblock the team by debugging deeply rooted technical issues and creating Proof of Concepts (POCs) for new technologies.
Requirements
- 5+ years in a senior frontend engineering role with a strong track record of shipping complex, user-facing web applications.
- Deep understanding of modern JavaScript (event loop, closures, async programming) and advanced TypeScript (generics, advanced types).
- Strong command of React core concepts, component lifecycle, rendering optimization, and modern state managers (Redux, Zustand, etc.).
- Expert knowledge of the browser rendering pipeline, DOM manipulation, semantic HTML5, and CSS preprocessors (Sass/Less).
- Proficiency in configuring build tools (Webpack) and writing comprehensive automated tests.
- The ability to clearly articulate complex architectural decisions and trade-offs to both technical and non-technical audiences.
- Upper-Intermediate+ English and fluent Ukrainian.
Benefits
- Benefits Cafeteria — annual budget you allocate to: Sports • Medical • Mental health • Home office • Languages.
- Paid maternity/paternity leave + monthly childcare allowance.
- 20+ vacation days, unlimited sick leave, emergency time off.
- Remote-first + tech support + coworking compensation.
- Team events (online/offline/offsite).
- Learning culture with internal courses + growth programs.
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