Jaejin Bae

Available from 1 Dec 2026

Unity & Software Developer | Games, Android, Desktop & Web I develop browser games, mobile and desktop applications, and websites - with commercial Unity/C# experience and one year of professional native Android app…

About

Unity & Software Developer | Games, Android, Desktop & Web

I develop browser games, mobile and desktop applications, and websites - with commercial Unity/C# experience and one year of professional native Android app development. I also welcome Java game and HTML/PHP website work with the scope agreed before development.

I bring 7 years and 8 months of professional software development across employment and contract work, including 6 years and 7 months with Unity/C#. I also continue independent development. My work covers commercial games, XR/VR, multiplayer systems, prototypes, debugging, performance optimization, and release support.

What I can help you build:

  • Browser and web games using Unity/WebGL, plus clearly scoped Java game projects.
  • Native Android apps and Unity-based mobile or Windows desktop applications.
  • HTML/PHP websites, client/backend integration, feature updates, and bug fixes.
  • Gameplay, UI, networking, XR/VR interaction, and maintainable application systems.

Relevant delivery experience:

  • NEXTOR: Main Unity Developer / Technical Lead across six related VR applications, including multiplayer simulation, tracked interaction, runtime authoring tools, content delivery, and optimization.
  • IKINA GAMES: Main programmer on Order Zero (500,000+ downloads); gameplay, events, and live-service improvements for FAIRY TAIL.
  • Bloomery, my personal development brand: Independently developed and released Lofi Cozy Room on Steam, handling architecture, programming, UI, optimization, publishing, and support. Also developing Zero Point, a single-player sci-fi survival crafting game: gathering, crafting, survival, colony systems, quests, companion AI and combat. Steam Early Access planned for December 2026; active development.
  • Earlier work: End-to-end Unity projects at BDAPPS with PHP/backend integration, commercial mobile game release, and native Android development at Bizplanet.

My Java experience includes one year of professional native Android development at Bizplanet (February 2017–February 2018). I have also built a company PHP website and worked on PHP/backend integration; HTML includes study experience. For Java and web projects, I review your requirements and existing code before confirming the scope, timeline, and milestones.

I completed NCS Unity game-development teaching assignments for the startup classes of Oz Coding School’s 6th and 8th game-development camps.

You receive clear progress updates, testing against agreed acceptance criteria, and a documented handover. Based in Fukuoka, Japan. Target start date for new projects: December 1, 2026. Available 30-40 hours per week during weekday daytime hours (09:00-19:00 JST); no night or weekend work. Korean native, Japanese fluent; English communication primarily in writing with translation tools.

Base rate: USD 40 per hour. Project scope and milestones are agreed before work begins.

  • Joined October 2026

Languages

  • KoreanFluent
  • JapaneseFluent
  • EnglishIntermediate

Industry experience

  • Gaming
  • Software & Internet
  • Government
  • Media & Entertainment

More experts in Fukuoka, Japan

Projects · 5

Coast Guard VR Training Platform

My role Main Unity Developer / Technical Lead at NEXTOR, October 2023 - January 2026. Engineering contribution Led Unity development across six related VR training applications for Meta Quest and PC. My work covered Unity 6/HDRP architecture, server-authoritative multiplayer simulation, dedicated servers, full-body tracking, gesture recognition, runtime scenario authoring tools, Addressables remote content, NPC AI and Quest optimization. Delivery scope System design, implementation and integration across the related applications. This case study describes my programming contribution to a company-owned government R&D project. Public materials The image is an explanatory portfolio diagram prepared from publicly shareable engineering descriptions. It is not an internal screenshot, actual deployment topology or client document. No internal code, server addresses or confidential project materials are included.

  • App Developer
  • Developer
  • Game Developer
  • +2
Lofi Cozy Room - Commercial Windows Desktop Companion

Project A commercial 3D Windows desktop companion released on Steam on July 31, 2026. My contribution Working under my personal development brand Bloomery, I handled software architecture, Unity/C# programming, interactive room systems, character behavior, customization, UI/UX, optimization, publishing and post-launch support. The product combines a living 3D room with practical desktop tools, music controls and customization. Delivery Full software delivery from concept through a released Steam product and ongoing updates. Licensed assets were used; independent development describes my engineering and delivery role, not authorship of every art or music asset. Gameplay Gameplay showcase uploaded by me for Lofi Cozy Room. https://www.youtube.com/watch?v=o7ovmtgyxAo Public Steam product page: https://store.steampowered.com/app/4621450/

  • App Developer
  • Developer
  • Game Developer
  • +2
Zero Point - Sci-Fi Survival & Crafting

Project Solo-developed single-player sci-fi survival crafting adventure for Windows, under my personal development brand Bloomery. My engineering contribution Unity/C# architecture and gameplay/UI integration across gathering and tool crafting; oxygen, food, hydration and rest; inventory and equipment; colony resources, power and oxygen management; construction at designated sites; quest progression and journal/UI; companion AI, dialogue and third-person ranged/melee combat. I also handle debugging, optimization and ongoing production. Latest gameplay A continuous 29:57 opening session from the updated development build: crew interactions, gathering, crafting and the early colony. https://www.youtube.com/watch?v=4MIOZwq5zsc Development status Steam Early Access is planned for December 2026. Active development; this is not a released demo or a finished game. Construction currently uses designated sites and systems, balance and progression continue to evolve. Licensed assets are used; my role is software engineering, integration and production, not authorship of every art, animation or music asset. Public Steam page: https://store.steampowered.com/app/4496220/

  • App Developer
  • Developer
  • Game Developer
  • +2
FAIRY TAIL 極・魔法乱舞 - Live-Service RPG

Project FAIRY TAIL 極・魔法乱舞, a company-owned licensed-IP mobile RPG. My role Unity Developer at IKINA GAMES, October 2020 - April 2023. Engineering contribution Contributed to live-service development through battle-system updates, event implementation, quality-of-life improvements and ongoing content updates. My work involved maintaining and extending an existing Unity production codebase and delivering recurring gameplay and content changes. Team project and public media This case study describes my programming contribution. The game, licensed IP, artwork and branding remain with their respective rights holders. The video below is third-party public gameplay footage for project context. My work was Unity development and live-service updates; I do not claim ownership of the footage. https://www.youtube.com/watch?v=sM3WsSfJVHI

  • Developer
  • Game Developer
  • Programmer
  • +1
Order Zero - Commercial Mobile Shooter

Project A company-owned commercial mobile shooter with 500,000+ downloads. My role Main Programmer at IKINA GAMES, October 2020 - April 2023. Programming contribution Implemented chapters, bosses, gameplay gimmicks and placement tools, progression, buffs, player skills, events, dungeons and live updates using Unity/C#. My role focused on turning gameplay and content requirements into maintainable production systems. Team project and public media This portfolio presents my programming contribution to the company project. The game, artwork and branding remain with their rights holders. The video below is third-party public gameplay footage provided for project context. I did not upload or create this footage and do not claim ownership of it. https://www.youtube.com/watch?v=BBXXCxFPKDE

  • Developer
  • Game Developer
  • Programmer
  • +1

Work experience· 6 roles

Independent Unity Developer (Senior Unity Developer) · Bloomery (independent / personal brand)Jan 2026 – Present · 11 mos

Developed and shipped Lofi Cozy Room, a commercial 3D Windows desktop companion released on Steam in July 2026. Owned the software architecture and Unity/C# implementation, including interactive room and avatar systems, customization features, UI/UX, performance optimization, publishing, and post-launch support. Also developing Zero Point, a solo-developed single-player sci-fi survival crafting game for Windows. I integrate gathering, crafting, survival needs, colony resources, designated-site construction, quests, companion AI and third-person combat. In active development; Steam Early Access is planned for December 2026.

Main Unity Developer / Technical Lead · NEXTOROct 2023 – Jan 2026 · 2 yrs 4 mos

Led system architecture and implementation across six related VR applications for a government-funded training platform. Built Meta Quest/PC systems using Unity 6 and HDRP, including server-authoritative multiplayer simulation, dedicated servers, full-body tracking, gesture recognition, runtime scenario authoring, Addressables remote content, and NPC AI. Optimized performance for Quest and contributed to overall optimization and NPC improvements in collaboration with project teams (including Zemiverse).

Unity Developer / Main Programmer · IKINA GAMESOct 2020 – Apr 2023 · 2 yrs 7 mos

Main programmer for Order Zero, a commercial mobile shooter with 500,000+ downloads. Built gameplay features and production tools including chapters, bosses, combat gimmicks, progression, buffs, player skills, events, and dungeons; supported live updates. Contributed to battle updates, events, quality-of-life improvements, and content production for FAIRY TAIL: Goku Mahou Ranbu. Also developed prototype and core systems for an idle shooting RPG.

Unity Developer · BDAPPSFeb 2019 – Mar 2020 · 1 yr 2 mos
Freelance Unity Developer · Self-employedSep 2018 – Feb 2019 · 6 mos
Android Developer · BizplanetFeb 2017 – Feb 2018 · 1 yr 1 mo

Education

Associate Degree, Information Processing · ITBANK / Academic Credit Bank System2017 – 2019

Certifications and awards

Japanese Language Proficiency Test Level 12008

Passed in February 2008. Historical JLPT Level 1 qualification; Japanese proficiency is fluent. Qualification dates are recorded to month/year precision.

Cambridge First Certificate in English (FCE)2012

Certificate obtained in December 2012. Current English proficiency is conversational. Qualification dates are recorded to month/year precision.

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