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Middle/Senior Front End Developer for Sportsbook

GR8 Tech
Full-time
On-site
Warsaw, Masovian Voivodeship, Poland

GR8 Tech is a leading B2B provider of iGaming solutions that empowers operators to grow, lead, and win.


We deliver high-impact, full-cycle tech solutions designed to scale. From seamless integration and expert consulting to long-term operational support, our platform powers millions of active players and drives real business growth. It’s more than just a product — it’s the iGaming Platform for Champions, built for those who play to lead.


We know the game and how to take it to the next level. With 1000+ talented professionals on board, we don't just build tech — we build success stories for iGaming operators all over the world. 


Our ambition drives us, our people make it real. Join us and be part of building champion-level success!


What You’ll Be Driving:



  • Designing and implementing scalable and efficient software architectures;

  • Writing, testing, and debugging complex code for new and existing software applications;

  • Providing guidance and mentorship to junior engineers and team members;

  • Conducting thorough code reviews to ensure code quality, security, and adherence to best practices;

  • Creating and maintaining comprehensive technical documentation for software development and system design;

  • Leading and managing software development projects (shared responsibility with the Delivery Manager) to ensure timely delivery and quality;

  • Collaborating with cross-functional teams, including product management, design, and operations, to align development efforts with business goals;

  • Researching and implementing new technologies and methodologies to enhance software performance and streamline 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;

  • Communicating effectively with stakeholders, including presenting technical concepts and project updates;

  • Delivering code to production in a timely manner according to business expectations.


What Makes You a GR8 Fit:



  • 3+ years of experience in automation testing;

  • Expertise in React and TypeScript — strong understanding of component architecture, hooks, and type safety;

  • Experience building scalable front-end solutions (multi-brand or modular architecture, shared component libraries);

  • Proficiency in front-end performance optimization — bundle analysis, caching, code-splitting, and rendering efficiency;

  • Practical experience with testing frameworks (Jest, React Testing Library);

  • Strong collaboration skills — ability to work closely with QA, backend, and product teams in Agile environments;

  • Ability to take ownership of complex features or domains and deliver end-to-end solutions;

  • Fluent in Ukrainian;

  • Intermediate level of English.



 

Why You’ll Love Working Here:


Benefits Cafeteria


An annual fixed budget that you can use based on your needs and lifestyle. You decide how to allocate it:



  • Sports – gym, yoga, or any activity to keep you active;

  • Medical – insurance and wellness services;

  • Mental health– therapy or coaching support;

  • Home office – ergonomic furniture, gadgets, and tools;

  • Languages – courses to improve or learn new skills.


Work-life 



  • Parental support with paid maternity/paternity leave and monthly childcare allowance;

  • 20+ vacation days, unlimited sick leave, and emergency time off;

  • Remote-first setup with full tech support and coworking compensation;

  • Regular team events – online, offline, and offsite;

  • Learning culture with internal courses, career development programs, and real growth opportunities.


Our Culture & Core Values


GR8 Tech culture is how we win. Behind every bold idea and breakthrough is a foundation of trust, ownership, and a growth mindset. We move fast, stay curious, and always 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.


To keep things efficient, please apply only for roles that closely match your experience.