AI Programmer

LightSpeed Japan Studio is a game development studio dedicated to crafting original AAA action game titles for global audiences. Led by industry veteran Hideaki Itsuno, the studio operates across two locations in Tokyo and Osaka.

The studio offers a flexible and inclusive work environment and actively welcomes game creators who are full of talent and passion for pushing the boundaries of game development.

• Design and implement player character behavior AI (combat AI, exploration AI, etc.)
• Build AI architecture using Behavior Trees, Utility AI, State Machines, etc.
• Implement and improve Navigation Mesh and Pathfinding
• Design logic for advanced tactical behaviors such as surrounding, encircling, and evasion
• Collaborate with level designers and game designers to define AI specifications
• Debug AI behavior, adjust behavior, and optimize performance
• Extend AI-related systems and improve tools using UE5
• If you have experience with learning AI (ML, reinforcement learning, etc.),
• You can also be responsible for applying it to NPC behavior optimization and test automation.

• Practical game development experience using C++
• AI development experience in console games or medium to large-scale titles
• Experience implementing AI logic using Behavior Trees, State Machines, etc.
• Basic understanding of Navigation, Pathfinding, and Movement control
• Communication skills to understand game design intentions and translate them into AI specifications
• Debugging skills and analytical ability to improve AI behavior
• Experience with humanoid AI/ally AI
• Experience building AI architecture (decision-making) using Behavior Trees, Utility AI, State Machines, GOAP (Goal-Oriented Action Planning), etc.
• Experience implementing and improving Navigation Mesh, Pathfinding, steering behaviors, and formation movement
• Group control/meta AI: Experience managing the entire game (enemy, ally AI, NPCs) rather than individual AI
• Conversation systems: Experience developing real-time character chatter and combat conversations.

• Annual salary: Negotiable (with salary increases/bonuses)
• Will be commensurate with experience and skills, based on our company regulations.
• For general employees, a fixed overtime allowance for 35 hours per month is included.

For management positions, a fixed overtime allowance for 10 hours per month is included.

• Working hours: 09:30 ~ 18:30, Break time: 60 minutes
• Flextime available
• Complete two-day weekend system (Saturdays, Sundays, and national holidays)
• Paid leave: In the first year of employment, granted pro-rata based on the month of joining. Up to 22 days based on years of service.
• New Year's holiday (December 30th - January 3rd)
• Sick leave (paid): 12 days/year (granted separately from paid leave)
• <Various insurances>

Health Insurance, Employment Insurance, Workers' Accident Compensation Insurance, Employees' Pension Insurance, Group Life Insurance (GTL)

Business Accident Assurance (GPA), Group Long-Term Disability Income Protection Insurance (GLTD)

Overseas travel insurance

• <Various allowances>

Commuting allowance (up to 50,000 yen/month), Communication allowance (up to 10,000 yen/month), Self-improvement allowance (up to 20,000 yen/month), Meal subsidy of 1,800 yen/day for days worked in the office, Regular health check-up allowance (up to 75,000 yen once a year)

• <Support systems and other benefits>

Free drink corner, Gift cards (paid twice a year, for Obon and New Year, 20,000 yen/time)

Employee Assistance Program (EAP), Condolence money, Long-service award/leave