Role
Senior Mobile Engineer (Flutter)
Role summary
Join an ambitious AI-powered gaming startup 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.
Important
• On-site role in Sofia, Bulgaria
• Competitive Salary + meaningful equity
• 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
Job description
We are looking for a Founding Engineer focused on Web Gaming to build the game creation layer of an AI-powered gaming platform.
Working directly with the founders and AI team, you'll build browser-based games, create reusable game systems, optimize performance, and help define a completely new category of AI-generated entertainment.
Responsibilities
• Build browser-based games using JavaScript and HTML5
• Own the game creation layer of the platform
• Design engaging game mechanics
• Optimize performance for web and mobile devices
• Rapidly prototype new gameplay concepts
• Ship production-ready features and games
• Collaborate closely with AI engineers, designers, and founders
• Improve gameplay using analytics and player feedback
• Help prepare major product releases and investor milestones
Required Skills
• Strong JavaScript experience
• HTML5 game development
• Browser-based game development
• Proven portfolio of polished web games
• Experience shipping games from concept to production
• Performance optimization experience
• Product ownership mindset
• Fluent English
Technologies
• JavaScript
• HTML5
• Browser Game Development
• Web Technologies
• Mobile-First Development
• Performance Optimization
• Rapid Prototyping
• AI-Assisted Development
Nice To Have
• Gaming studio experience
• Hyper-casual or casual games
• AI-assisted game development
• Startup experience
• Mobile gaming experience
• Leadership experience
• Founder or early-stage startup background
Soft Skills
• Entrepreneurial mindset
• Strong ownership mentality
• Creativity
• Product thinking
• Fast execution
• Adaptability
• Collaboration
• Problem-solving
• Metrics-driven decision making
• Comfortable working in ambiguity
Working directly with the founders and AI team, you'll build browser-based games, create reusable game systems, optimize performance, and help define a completely new category of AI-generated entertainment.
Responsibilities
• Build browser-based games using JavaScript and HTML5
• Own the game creation layer of the platform
• Design engaging game mechanics
• Optimize performance for web and mobile devices
• Rapidly prototype new gameplay concepts
• Ship production-ready features and games
• Collaborate closely with AI engineers, designers, and founders
• Improve gameplay using analytics and player feedback
• Help prepare major product releases and investor milestones
Required Skills
• Strong JavaScript experience
• HTML5 game development
• Browser-based game development
• Proven portfolio of polished web games
• Experience shipping games from concept to production
• Performance optimization experience
• Product ownership mindset
• Fluent English
Technologies
• JavaScript
• HTML5
• Browser Game Development
• Web Technologies
• Mobile-First Development
• Performance Optimization
• Rapid Prototyping
• AI-Assisted Development
Nice To Have
• Gaming studio experience
• Hyper-casual or casual games
• AI-assisted game development
• Startup experience
• Mobile gaming experience
• Leadership experience
• Founder or early-stage startup background
Soft Skills
• Entrepreneurial mindset
• Strong ownership mentality
• Creativity
• Product thinking
• Fast execution
• Adaptability
• Collaboration
• Problem-solving
• Metrics-driven decision making
• Comfortable working in ambiguity