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November 3, 2026
Senior Full-Stack Engineer (JavaScript/PHP)
Senior • On-site
149,977 - 278,530 PLN/yr
Gdańsk, Poland
Quick Facts
Role: Senior Full-Stack Engineer (JavaScript/PHP)
Description
Join a product-focused team building end-to-end social casino and gameplay systems. You will implement frontend features in JavaScript for iOS, Android, and Web, and develop backend services and REST APIs in PHP that support new gameplay, social features, and LiveOps. The work includes performance optimization, ensuring quality and testability, and iterating based on user behavior and analytics.
Responsibilities
- Develop comprehensive functionality and expand social systems and game mechanics
- Own features from concept through deployment and monitoring
- Implement JavaScript frontend functionality for iOS, Android, and Web
- Build backend services and PHP APIs supporting gameplay, social features, and LiveOps
- Design scalable REST interfaces used by client applications
- Co-create data models and information storage mechanisms for player progress, rewards, and events
- Optimize backend performance under high concurrency and large user volume
- Ensure high quality, reliability, and testability of delivered features
- Analyze and optimize frontend and backend performance for smooth player experiences
- Collaborate with Product Management to define technical solutions and make pragmatic design decisions
- Monitor outcomes post-deployment and evolve features based on user behavior and analytics data
- Turn creative ideas into engaging, scalable systems
- Identify opportunities to improve architecture, tools, and software delivery processes
Requirements
- Degree in CS or equivalent professional experience
- At least 4 years of professional software development
- Practical production experience with JavaScript
- Production experience building backend services
- Experience designing and integrating REST APIs
- Knowledge of client-server architecture
- Experience delivering features across the full software lifecycle
- Analytical thinking and problem-solving with focus on end-user needs
Benefits
- Competitive compensation package tied to results, recognizing individual impact and achievements
- Potential annual bonuses and motivation benefits depending on role and location
- Health and wellbeing benefits, paid time off, retirement programs, insurance coverage, and other local/statutory benefits
- Detailed compensation and benefits discussed during the recruiting process
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