Founding Engineer - Gaming

Join an ambitious AI-powered gaming startup as a Founding Engineer and help build the next generation of user-generated mobile gaming experiences.

This role is ideal for experienced JavaScript game developers who have shipped browser-based games from concept to production and want direct ownership of a core product area.

The position offers a competitive salary plus meaningful equity participation in an early-stage startup.

Important

• On-site role in Sofia, Bulgaria
• Fluent English required
• Strong JavaScript experience required
• Proven web game development experience required
• Portfolio of polished, playable games required
• Experience shipping games from concept to production
• Founding team opportunity
• Equity package included
• Competitive salary
• Meaningful equity ownership in an early-stage startup

We are looking for a Founding Engineer focused on Web Gaming to help build the future of AI-powered game creation.

You will own the game creation layer of the platform and work closely with AI engineers, designers, and founders to develop browser-based games that can be created, played, and shared by users.

This role combines game development, product ownership, rapid prototyping, performance optimization, and startup execution in a fast-moving environment.

Responsibilities

• Build browser-based games using modern JavaScript technologies
• Own the game creation layer of the platform
• Collaborate closely with AI engineers and founders
• Design and implement engaging game mechanics
• Optimize performance across web and mobile devices
• Rapidly prototype and validate new game concepts
• Ship production-ready features and games
• Analyze user behavior and improve engagement
• Contribute to product direction and technical decisions
• Support preparation for major product and investor milestones

Required Skills

• Strong JavaScript development experience
• Proven experience building browser-based games
• Portfolio of polished and playable games
• Experience shipping games from concept to production
• HTML5 game development experience
• Strong product ownership mindset
• Experience with performance optimization
• Experience building interactive web applications
• Fluent English communication skills
• Ability to work on-site in Sofia

Technologies

• JavaScript
• HTML5
• Browser Game Development
• Web Technologies
• Mobile-First Development
• Performance Optimization
• Rapid Prototyping
• AI-Assisted Development

Nice To Have

• Experience leading game development teams
• Gaming studio experience
• Hyper-casual game experience
• Viral gaming product experience
• AI-assisted game development
• Startup experience
• Mobile gaming experience
• Founder or early-stage startup background
• Open-source contributions

Soft Skills

• Strong ownership mentality
• Entrepreneurial mindset
• Creativity
• Product thinking
• Fast execution
• Adaptability
• Collaboration skills
• Problem-solving ability
• Metrics-driven decision making
• Comfortable working in ambiguity