Senior Frontend Developer
GR8_TECH builds B2B iGaming platforms for operators who play to lead. We deliver full-cycle, high-impact tech designed to scale - from seamless integrations and expert consulting to long-term operational support. Our platform powers millions of active players and drives real business growth. Call it what it is: the iGaming Platform for Champions. With 1000+ GR8 people across locations and time zones, we don’t just ship technology - we help operators build success stories across brands, markets, and geos. Our ambition drives us. Our people make it real. If you’re a challenger in spirit and a champion in action - join us.
- 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.
- 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.
- Familiarity with microservice/event-driven architectures and client-server communication (REST APIs, WebSockets).
- Experience with Cloud/DevOps practices (Docker, CI/CD pipelines, basic AWS/GCP/Azure knowledge).
- Basic understanding of backend database concepts (SQL/NoSQL) and broader system analysis.
- Annual budget allocated 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.
GR8 Tech is a business-to-business iGaming software provider headquartered in Limassol, Cyprus, supplying sportsbook and casino platform technology to operators. It is the rebranded B2B arm of Parimatch Tech, spun out from the consumer Parimatch brand in 2023. The company's modular platform supports millions of active users across more than 40 countries, maintained by a team of over 900 specialists. GR8 Tech focuses on high-performance, scalable sportsbook and gaming infrastructure.
