Senior Frontend Developer

GR8 Tech

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.

Posted 5/11/2026full-timeRemote • 🌎 Anywhere in the WorldSeniorWebsite

Tech Stack

Tools & technologies

JavaScriptJestReactReduxSCSSTypeScriptWebpack

About the role

Key responsibilities & impact

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

What you’ll need

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

Comp & perks

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.

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

ReactJavaScriptTypeScriptstate managementWebpackCORSCSPOWASPJestReact Testing Library

Soft Skills

mentoringcode reviewscommunicationproblem-solvingcollaboration