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Senior HTML5 Game Developer

Booming Games · Pressig

On-siteSeniorPosted 23 Sept 2026

What this role requires

3 requirements, read out of the advert rather than guessed from the job title:

Also mentioned, not required: HTML5, Phaser, Git, JIRA, Spine, CSS3, English. Worth having, but their absence is not what gets a CV filtered out.

Check my CV against these 3 requirements

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Job description

About the role

You will complete our Game Development crew of 14 lovely and skilled people and report to the Team Lead Frontend Games. Your passion for online casino games combined with your technical knowledge allows us to bring the best slots to the market.

Responsibilities

Game Development & Implementation

Translate game design documents (GDD) into HTML5 game presentations.

Break down GDD features into a Work Breakdown Structure (WBS) and create JIRA tickets.

Read the full description (65 more sections)

Ensure tasks are manageable within a maximum of one workweek and align with team estimates.

Implement game features and functionality using TypeScript (latest standard).

Follow best practices, ensuring well-typed and well-documented code.

Use JavaScript (ECMAScript) only when necessary, documented with JSDoc.

Version Control & Code Management

Work with Git (GitLab as the central repository).

Commit code at least once per working day to feature branches.

Follow semantic commit conventions, including (JIRA or similair) ticket ID.

Submit merge requests (MR) when work is completed and defect-free.

Address feedback from MR reviewers and escalate disputes to the Architect or Engineering Manager if needed.

Ensure code adheres to Secure Development Principles.

Visual & Audio Effects Implementation

Integrate static art, animations (Spine), image sequences, and particles.

Use libraries like PIXI.js for optimal rendering performance.

Collaborate with Tech Art to optimize assets for efficient implementation Code Quality & Optimization

Code Quality & Optimization

Ensure clean, well-documented, and tested code.

Use browser developer tools to track FPS, memory, CPU/GPU usage, and draw calls.

Prioritize and fix bugs with utmost urgenc

Maintain unit and integration test coverage, ensuring communicated line coverage is not reduced.

Remove dead code and optimize project assets.

Game Code Building & Delivery

Utilize Webpack for efficient bundling, minification, and optimizat

Optimize images, text, and assets for a production-ready build.

Understand and enhance GitLab CI for efficient deployment

Ensure games are optimized for HTTP/HTTP2/HTTP3, WebSockets, and other network communications to enhance player experience.

Collaboration & Development Process

Work closely with Game Producers, Art Directors, and QA to ensure smooth development.

Conduct game demos for Product Owners.

Address QA-reported defects with highest urgency.

Follow structured development milestones:

* Alpha – Game functions as per specification (even if assets are incomplete

* Beta – Full asset implementation; game ready for QA testing

Requirements

At least 3 years of Game Development experience and 5 years overall development

Fluent in Typescript and Javascript (ES6) and HTML5/CSS3

Highly experienced with PixiJS, Phaser, or equivalent

Complete fluency in English, written and spoken

Strong communication and teamwork skills

Experienced with Git, JIRA (or equivalent Issue / Project tracking software), and GSuite

Attention to detail, problem-solving, and multitasking skills

Experience with Spine animations, including optimization

Nice to have

Experience with WebGL or other graphics programming API.

Casino slot player.

Creativity.

Background in statically typed languages.

Good to know

This full-time position is on an indefinite freelance basis for contractors within the Central European Timezone +/-2.

Why Work for Booming Games

Founder led. Impact driven. Employee centric.

At Booming Games, we're reshaping the iGaming world with our remote-first approach. Our rhythm? Thrilling slot games with captivating features and stunning designs released every two weeks - no exceptions! Here, it's all about co-ownership and real growth. Dive into a diverse team where your input powers every game we craft!

Our perks

We’re a 100% remote-first company, offering a best-in-class remote experience

Competitive package

Dog friendly offices in Berlin and Malta

Family friendly policies

Career growth opportunities

Zestful working environment

Knowledge sharing opportunities

Dynamic culture surrounded by industry experts

Company social events for team bonding

Contact

Recruiting Team

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