Senior Frontend Engineer Department:
Engineering Team
Employment Type:
Full Time
Location:
Warsaw (Remote)
Reporting To:
Ilir Koskija
Description RubyPlay
is a place where passion meets competence. Since 2017, we've created 250+ innovative games and built 100+ strong partnerships worldwide.
Proud to be:
The Winner at BFTH Arena Awards — Best Online Casino Game
Shortlisted for SBC Awards 2024 — Casino/Slots Developer of the Year
A strong player across 10+ global markets
A trusted workplace for hundreds of specialists from 34 countries
Our team builds the interactive features that make online casino games more engaging, including promotions, free rounds, tournaments, missions, and jackpots.
We're looking for a
Senior Frontend Engineer
to develop and maintain the shared frontend technology powering these features across our game portfolio.
This isn't a typical UI development role. You'll work on complex application behavior, real-time events, asynchronous workflows, and reusable components that need to work reliably across many games.
Here’s How You’ll Make an Impact:
Develop and maintain shared frontend libraries used across multiple games
Build event-driven features involving complex state transitions, asynchronous operations, and real-time communication with backend services
Ensure new functionality integrates reliably with existing game systems while maintaining backward compatibility
Investigate challenging issues involving race conditions, application lifecycle, and interactions between different features
Improve code quality, maintainability, and reusability through thoughtful architecture and refactoring
Collaborate with fellow engineers, game developers, designers, and product stakeholders to shape technical solutions.
Contribute to technical decisions, code reviews, and improvements to development practices
What Makes You A Strong Candidate:
5+ years of experience with TypeScript and JavaScript, building complex frontend applications, frameworks, or shared libraries
Strong understanding of asynchronous programming, event-driven architecture, state management, and application lifecycle
Experience designing and maintaining reusable components or libraries
Ability to investigate complex issues across frontend and backend integrations
Solid understanding of software architecture, maintainability, testing, and backward compatibility
Upper-Intermediate English or higher (B2+, C1 preferred)
Nice to have:
Experience in iGaming or HTML5 game development, particularly with PixiJS or Phaser
Experience developing SDKs, frameworks, or shared libraries used by multiple teams
Familiarity with WebSockets, Server-Sent Events, or other real-time communication technologies
Experience with state machines or statechart-based architectures
Understanding of distributed systems and asynchronous messaging
Strong candidates with fewer years of experience but demonstrated expertise in complex frontend architecture or shared frameworks are welcome to apply
What you'll tackle early on
Get familiar with our shared frontend architecture and how interactive features integrate with game clients
Start contributing to existing functionality, improving reliability and addressing technical issues
Work on integrations with external promotion and engagement platforms
Contribute to upcoming features, including jackpot functionality and improvements to our existing player engagement systems
What success looks like in 6 months:
You independently deliver complex frontend changes with a strong focus on quality and reliability
You've taken ownership of meaningful parts of our shared frontend technology
You've contributed to a major feature or technical improvement
Your work has improved the maintainability, stability, or extensibility of our systems
You collaborate effectively with engineers and product stakeholders across the organization
Why You’ll Love It Here:
Your work reaches players across RubyPlay's entire game portfolio
Interesting engineering challenges involving state machines, real-time events, and shared frontend architecture
A strong international team with a fully remote working environment
Growth budgets, bonuses, English classes, development days, paid vacation, and well-being support
If you enjoy figuring out how complex systems behave, not just how they look, we should talk!
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Senior Frontend Engineer (Engagement) in Warsaw – pracodawca: RubyPlay
RubyPlay w Warszawie to doskonały pracodawca, który oferuje wyjątkowe możliwości rozwoju zawodowego w dynamicznym środowisku gier. Pracując z nami, będziesz częścią zespołu, który ceni kreatywność i współpracę, a także zapewnia wsparcie w podnoszeniu umiejętności oraz dostęp do najnowszych technologii w branży. Nasza kultura pracy sprzyja innowacjom i pozwala na elastyczność, co czyni nas idealnym miejscem dla pasjonatów animacji 2D, którzy chcą mieć realny wpływ na projekty.
