Senior Front End Developer for Platform Widgets Web

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. Why this role exists: The purpose of this role is to design and implement scalable software solutions, ensuring high-quality delivery within established timelines. The role focuses on solving complex technical challenges, improving engineering practices, and contributing to software reliability and performance. A Senior Developer mentors peers, shares technical expertise, and collaborates with cross-functional teams to deliver solutions that meet business requirements. What you’ll drive: Architecture and development Designing and implementing scalable and efficient software architectures. Writing, testing, and debugging complex code for new and existing software applications. Delivering code to production in a timely manner according to business expectations. Leadership and collaboration Providing guidance and mentoring to junior engineers and team members. Conducting thorough code reviews to ensure code quality, security, and best practices. Managing software development projects, ensuring timely delivery and quality. Collaborating with cross-functional teams to design and align technical solutions that meet business objectives Communicating effectively with stakeholders on technical concepts. Engineering processes and quality assurance Creating and maintaining comprehensive technical documentation for software development and system design. Creating and maintaining comprehensive technical documentation for software development and system design. Researching and implementing new technologies and methodologies to improve software performance and development processes. Identifying and resolving complex software issues and technical challenges. Developing and enforcing testing protocols to ensure software reliability and performance. Driving continuous improvement in software development practices and processes. What makes you a GR8 fit: Must-have Minimum of 5 years of experience in a similar senior engineering role; Deep knowledge of JavaScript, TypeScript, React, HTML, CSS, state management libraries, build tools, package managers, and web testing frameworks; Experience with microfrontend architectures and Module Federation patterns (Webpack Module Federation, dynamic remote loading, shared dependency management); Ability to analyze code, debug complex issues, optimize performance, and develop proofs of concept (PoCs); Understanding of web performance metrics and browser performance optimization, including Core Web Vitals (LCP, INP, CLS), FCP, TTFB, TBT, Speed Index, Time to Interactive (TTI), bundle size, and JavaScript parsing and execution performance; Understanding of browser internals, SPAs and static websites, client-server architecture, REST APIs, SSR, web security, and UI/UX patterns; Effective communication skills with both technical and non-technical audiences; Upper-Intermediate English level. Why you’ll love working here: Benefits Cafeteria — annual budget you allocate to: Sports • Medical • Mental health • Home office • Languages. Work-life & support 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. Our culture & core values: GR8_TECH culture is how we win — through trust, ownership, and a growth mindset. We move fast, stay curious, and keep it real, with open feedback, room to experiment, and a team that’s got your back. FUELLED BY TRUST : we’re open, honest, and have each other’s backs. OWN YOUR GAME : we take initiative and own what we do. ACCELER8 : we move fast, focus smart, and keep it simple. CHALLENGE ACCEPTED : we grow through challenges and stay curious. BULLETPROOF : we’re resilient, ready, and always have a plan.