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Freddy Hajas

Principal Gameplay Designer/Programmer specializing in FPS/TPS systems and AI

Rio de Janeiro, BrazilInnovative Gameplay Designer & Programmer28 years experiencePrincipalVideo GamesSoftware DevelopmentInformation Technology & Services
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About

Long-time Call of Duty mod/game-mode creator (Call of Duty Frontlines/Rio) who designed 40+ gametypes, including “Swarm” later released officially as MW3’s Team Defender. Known for deep tuning/balance iteration and for overcoming engine constraints (e.g., expanding limited model slots via load-time model merging to ship large amounts of new weapons/vehicles/enemies). Currently building an UE5 game (Comando Rio) on Lyra, implementing custom audio systems and camera/movement features, collaborating with Gooseman (Counter-Strike creator).

Experience

Gameplay/Level Design (Third Person Shooter 171)171 (Betagames Group)
Gameplay QA / Gameplay Design Support (Cyborg3003)Banzato Games
Developer (Comando Rio)Hajas Game Studio
Developer (AfterImpaKt)Hajas Game Studio
Adobe ColdFusion DeveloperEletrobras
Application Servers Admin with .NET & ASP supportEletrobras
Microsoft SharepointEletrobras
Adobe ColdFusion DeveloperIRB-Brasil RE
General Internet SupportOpenlink Network (PSINet)

Education

PUC-RIObachelor, Computer Science (1999)
IBA-Wakigawahigh_school, Electronics & Computers (1993)

Key Strengths

  • Owned and shipped multiple multiplayer game modes end-to-end (40+ gametypes)
  • Strong multiplayer tuning instincts (spawn randomization, scoring/respawn adjustments based on play outcomes)
  • Deep domain experience with Call of Duty/id Tech engine and shipped mods/content used across titles
  • Solves hard engine constraints with technical design (model slot limitation workaround via load-time model merging)
  • Focus on replayability through systemic variation/unknowns in each play session
  • Built core gameplay systems in UE5 (custom audio behavior system; camera perspective switching; movement tweaks) using Lyra as a foundation

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Languages

PortugueseEnglish

Skills

Gameplay DesignGame DesignGameplay ProgrammingAI ProgrammingAI Behavior DesignBots DevelopmentGametypes DesignGame Modes DesignWeapon Modes DesignGameplay BalanceAsymmetric Multiplayer DesignFPS DesignTPS DesignLevel DesignMapping