Senior Game Developer (Casino Slots)

Arenaentertainment; Greater London; On-site; GBP 80,000 - GBP 100,000; Full time

Job summary

A digital entertainment company based in London is seeking experienced Front End Developers to join their Games Studio. You will be responsible for designing and maintaining a cutting-edge slots game framework while collaborating with a talented team. The ideal candidate has over 3 years of experience in building HTML-5 browser-based games and is proficient in HTML5, Javascript, and API integration. This position offers a highly competitive salary and a dynamic work environment.

Benefits

Highly competitive salary

Regular company socials

Reward and recognition programs

Free bicycle parking

20 days annual leave

Free on-site fruit and drinks

Free snacks and a PS5 in the office

Modern office space in central London

Qualifications

• 3+ years of professional experience building HTML-5 browser-based slot games.
• Extensive knowledge in HTML5, Javascript, Typescript.
• Great understanding of web services and API integration.

Responsibilities

• Design, build, and maintain multi-platform slots game framework.
• Stay up-to-date with new tools and technologies.
• Ensure best practices for development and testing.

Skills

HTML5

Javascript

Typescript

API integration

Cross-browser compatibility

PIXI.JS

Node.js

Tools

Git

Job description

About us

Arena is a fast-moving digital entertainment company creating platforms people genuinely love. Since 2021, we have launched bold brands including MetaWin, WOW Vegas, BetZoo Media, Hit.com and Rolla, with more on the way.

We operate globally from London, Malta, Gibraltar and Miami, combining the agility of a startup with the scale of a high-growth technology company. Free from legacy systems, we innovate fast and think big.

Arena is the place for self-starters who want to break away from corporate processes, take ownership of meaningful work, and build products that make a real impact.

Role Overview

Our Games Studio is looking for talented Front End Developers at mid or senior level to join our team to build state-of-the-art slot games and to improve our framework. The ideal candidate is a guru in their field and with plenty of passion for what they do. You will be working in a team of dedicated and highly talented people with long and proven track record building slots and other casino type products.

The Games Studio is a new venture founded by business veterans with over 16 years of experience, responsible for some of the top-performing games in the industry over the last two decades. We set high standards and strive for excellence in every aspect of our products and the gaming experience. We are assembling a team of individuals who are genuinely passionate about their work and excel in their respective areas of expertise.

Role Description

• Responsible for designing, building, and maintaining our multi platform slots game framework with a mobile first approach.

• To stay up-to-date with new tools and technologies within your field and proactively implement them in your work.

• Ensuring best practices for development and testing of the code base.

• Optimise applications for maximum speed, responsiveness, and best user experience.

• Collaborate closely with the studio head, game designers, mathematicians, artists, server developers, QAs etc. from project inception to completion and beyond.

• Proactively suggest improvement to processes and workflows.

• Assist game designers in visualising their game ideas building prototypes.

• Verify that math models, server responses, art assets and sounds are correctly implemented.

• Connect framework with backend servers, including RESTful APIs and WebSocket integration.

• Use version control systems such as Git to manage code repositories and ensuring workflows.

• Document code and framework, making it easy for other developers to use and understand.

The Candidate Must

• Have 3+ years of professional experience building HTML-5 browser-based slot games or similar applications.

• Possess extensive knowledge in HTML5, Javascript, Typescript.

• Have a great understanding of web services and API integration (especially REST APIs).

• Must have proven experience inPIXI.JS , Node.

• Be proficiency in cross-browser compatibility, usability, and accessibility design considerations.

• Have the ability to write efficient, clean and structured code that is easy to maintain and test.

• Be meticulous, proactive, and possess a keen eye for detail.

• Be an experienced problem solver and troubleshooter.

• Be fluent in English and communicate clearly and efficiently.

Bonus / Preferred (AI-Assisted & Vibe Coding)

• Hands-on experience with AI-assisted development tools, especially Claude Code, ChatGPT, GitHub Copilot, or similar.

• Comfortable practicing “vibe coding” — leveraging AI as a collaborative coding partner for rapid prototyping, refactoring, debugging, and idea exploration.

• Strong ability to review, validate, and take full ownership of AI-generated code, ensuring performance, maintainability, and correctness.

• Experience using AI to improve development velocity, code quality, and problem-solving efficiency is a strong plus.

Company Benefits

• Highly competitive salary reflecting your skills and experience.

• Regular company socials and outings.

• Reward and recognition programs to acknowledge your contributions.

• Free bicycle parking to promote eco-friendly transportation options.

• 20 days of annual leave, in addition to 8 days of bank holiday. (depending on contract)

• Free on-site fruit and hot drinks to keep you energised throughout the day.

• Free snacks, beer, and soft drinks and a PS5 in the office

• Lovely and modern office space in central London.