Check out _Website not available. Sign in: https://www.twine.net/signup_ Hi, I'm Justin, an independent game developer and general software engineer with a broad background in game programming, systems engineering, and full-stack web development. I'm currently contracting at Sony Interactive Entertainment, and I'm the co-founder of Sin Tiempo, an independent game development studio. I love building games, engines, and gameplay systems, and I earned a B.S. in Computer Science from Florida International University.…

HanshinJ

Check out _Website not available. Sign in: https://www.twine.net/signup_ Hi, I'm Justin, an independent game developer and general software engineer with a broad background in game programming, systems engineering, and full-stack web development. I'm currently contracting at Sony Interactive Entertainment, and I'm the co-founder of Sin Tiempo, an independent game development studio. I love building games, engines, and gameplay systems, and I earned a B.S. in Computer Science from Florida International University.…

Available to hire

Check out Website not available. Sign in: https://www.twine.net/signup
Hi, I’m Justin, an independent game developer and general software engineer with a broad background in game programming, systems engineering, and full-stack web development.
I’m currently contracting at Sony Interactive Entertainment, and I’m the co-founder of Sin Tiempo, an independent game development studio. I love building games, engines, and gameplay systems, and I earned a B.S. in Computer Science from Florida International University.

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Language

English
Fluent
German
Intermediate
Spanish; Castilian
Beginner

Work Experience

Software Engineer in Test at Sony Interactive Entertainment / PlayStation
November 1, 2025 - Present
Develop internal tooling to automate build pipelines and benchmark system library performance. Build and maintain Unreal Engine projects used across PlayStation testing infrastructure.
Backend Web Services Developer at Top Card Swap
June 1, 2024 - November 1, 2024
Developed Java-based backend services for an online trading card marketplace built from the ground up. Integrated third-party platforms including Twilio (SMS/notifications), Stripe (payments), and Shippo (shipping).
Gameplay & Systems Programmer at The Eagle On The Sun / DP Games
April 1, 2024 - June 1, 2024
Developed input, interaction, and save/load systems for a first-person narrative puzzle game (Unity, C#).
Game Designer & UE5 Blueprints Developer at Minimally Invasive / Marion Surgical Inc.
January 1, 2024 - March 1, 2024
Co-led game and level design for a VR surgical simulator adventure game targeting PC VR platforms. Implemented gameplay mechanics and systems using Unreal Engine 5 Blueprints.
Co-Founder at Sin Tiempo
March 1, 2023 - Present
Co-founded an independent game development studio; managed studio operations, client relationships, and project scoping across multiple engagements.
Game Developer at Atlantis World — Limitless Labs
May 1, 2022 - March 1, 2023
Built core game systems for a 2D online multiplayer browser game: Inventory, Quests, Action Triggers, and Collision Detection (JavaScript, TypeScript, Phaser). Developed and managed the game server using Node.js, Redis, and MongoDB. Implemented real-time in-game video chat using Jitsi and WebRTC.
Lead Software Developer at CaringOnDemand
May 1, 2016 - September 1, 2021
Led a team building an on-demand home health aide platform spanning Android, web, and backend services. Architected and developed cloud infrastructure on AWS using Java microservices and event-driven patterns. Integrated Twilio, Sendgrid, Stripe, Firebase, and other third-party platforms. Built a native Android app with offline support, geo-fencing, push notifications, and encryption. Partially managed MySQL and Redis databases.

Education

Bachelor's Degree in Computer Science at Florida International University
January 1, 2011 - January 1, 2016

Qualifications

Bachelor's Degree in Computer Science
August 20, 2011 - May 1, 2016

Industry Experience

Gaming, Software & Internet, Healthcare, Media & Entertainment, Professional Services
    Game Dev Showcase | Sin Tiempo Projects Showreel 2023
    A video showcase of past in-house project, prototypes, game jam games, and more. video preview showcase showreel…