Middle Full Stack Developer
GR8 Tech
- Location
- Poland
- Job Type
- full-time
- Salary
- Unknown
- Posted
- September 3, 2025
Job Description
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:
- Developing a user interface and logic for Aff.Tech;
- Participating in the development of software architectural solutions (create ADRs with the team, propose solutions and promote them);
- Supporting full development cycle (from accepting technical requirements from PO, code reviewing — to deliver changes to production);
- Closely communicating with product managers, providing best solutions and influence the product;
- Learning new things, new technologies, developing as a professional.
What Makes You a GR8 Fit:
- Working experience with commercial projects for over 3 years;
- Strong knowledge of React, PHP, Symfony, MySQL;
- Proven knowledge of JavaScript Core, ES6+, HTML5, CSS3;
- Knowledge of software design patterns, oop/functional programming;
- Experience with ClickHouse, Kafka & Redis would by a plus;
- Knowledge of Git flow and GitLab, JIRA, Confluence;
- Knowledge of CI/CD, Docker;
- Proficiency in working with build tools (Webpack);
- Familiarity with REST API;
- Experience with config management and distribution;
- Intermediate plus English level.
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.
🎯 Who is this job for?
This role suits a Middle Full Stack Developer with over 3 years of experience in React, PHP (Symfony), and MySQL. Candidates should be familiar with JavaScript (ES6+), HTML/CSS, REST APIs, Docker, and CI/CD pipelines, with bonus points for Kafka, ClickHouse, and Redis. The position involves end-to-end feature development, architectural contributions, and close collaboration with product managers.
💬 Potential Interview Questions
-
What are the key differences between React class components and functional components with hooks?
Functional components with hooks are simpler, encourage cleaner code, and allow using state and lifecycle logic without classes. Class components rely on lifecycle methods and are more verbose. -
How would you optimize a MySQL query for better performance?
By adding proper indexes, avoiding unnecessary joins, optimizing SELECT statements, and analyzing queries withEXPLAINto detect bottlenecks. -
What are some benefits of using Symfony for backend development?
Symfony provides reusable components, a strong ecosystem, built-in security features, and a structured MVC framework that supports scalable enterprise applications. -
How does Redis improve application performance?
Redis acts as an in-memory data store and cache, reducing database load and improving response times for frequently accessed data. -
What’s the role of Kafka in a distributed system?
Kafka enables high-throughput, fault-tolerant messaging between services, supporting event-driven architectures and real-time data streaming. -
Can you explain the difference between REST API and GraphQL?
REST exposes fixed endpoints with predefined responses, while GraphQL allows clients to request exactly the data they need in a single query, reducing overfetching and underfetching. -
How do you ensure secure handling of user authentication in a fullstack application?
By hashing passwords, using HTTPS, implementing token-based authentication (JWT/OAuth2), enforcing proper session management, and applying role-based access control. -
What is Git flow, and how does it improve collaboration in development teams?
Git flow defines a branching strategy with main, develop, feature, release, and hotfix branches, which helps teams manage parallel work and maintain stable releases. -
How would you use Docker in a development workflow?
By containerizing applications with all dependencies, ensuring consistency across environments, simplifying testing, and enabling easy deployment with Docker Compose or orchestration tools. -
What are some common design patterns you’ve applied in PHP or JavaScript projects?
Patterns like Singleton, Factory, Observer, and Dependency Injection help improve maintainability, scalability, and reusability of code in complex systems.
📋 Job Summary
GR8 Tech, a top-tier B2B iGaming solutions provider, is looking for a Middle Full Stack Developer to join their fully remote team. You'll work on Aff.Tech using React, PHP, Symfony, MySQL, and modern tools like Docker, Webpack, and CI/CD pipelines. The role covers full-cycle development and offers close collaboration with product managers to shape impactful features. Enjoy flexible time off, a benefits budget, remote support, and a culture driven by ownership, speed, and growth. Join 1000+ pros building success stories in the global iGaming arena.