Senior HTML5 Game Developer

Role overview

Join Booming Games as a Senior HTML5 Game Developer and help build the next generation of online casino slot games. You’ll translate game design documents into playable HTML5 experiences, working closely with frontend/game, art, QA, and product stakeholders.

Responsibilities

Game development & implementation

• Translate GDDs (Game Design Documents) into HTML5 game presentations
• Break down features into a Work Breakdown Structure (WBS) and create Jira tickets
• Ensure tasks fit within ~one workweek and align with team estimates
• Implement game features in TypeScript (use JavaScript/ECMAScript only when necessary, documented with JSDoc)
• Maintain well-typed, well-documented code and follow Secure Development Principles

Visual & audio effects

• Integrate static art, animations (Spine), image sequences, and particles
• Use PIXI.js (or similar) for rendering performance
• Collaborate with Tech Art to optimize assets for efficient implementation

Code quality, optimization & testing

• Keep code clean, documented, and tested
• Use browser dev tools to monitor FPS, memory, CPU/GPU, and draw calls
• Prioritize and fix bugs urgently
• Maintain unit and integration test coverage without reducing communicated line coverage
• Remove dead code and optimize project assets

Game code building & delivery

• Use Webpack for bundling/minification/optimization
• Optimize assets for production builds
• Improve GitLab CI for efficient deployment
• Ensure performance across HTTP/HTTP2/HTTP3, WebSockets, and other network communications

Collaboration & delivery process

• Work with Game Producers, Art Directors, and QA
• Run game demos for Product Owners
• Address QA defects with highest urgency
• Follow milestones:
  • Alpha: functions per spec (even if assets are incomplete)
  • Beta: full assets implemented; ready for QA

Requirements

• 3+ years of game development experience
• 5+ years overall development experience
• Strong in TypeScript, JavaScript (ES6), and HTML5/CSS3
• Highly experienced with PIXI.js, Phaser, or equivalent
• Fluent in English (written and spoken)
• Experience with Git and Jira (or equivalent issue/project tracking)
• Experience with GSuite
• Strong communication, teamwork, attention to detail, problem-solving, and multitasking

Nice to have

• Experience with WebGL or other graphics programming APIs
• Spine animation experience (including optimization)
• Background in statically typed languages
• Knowledge/experience with casino slot player domain
• Creativity

Contract / remote policy

• Full-time indefinite freelance basis for contractors
• Must be available within Central European Time (CET) +/- 2 hours