Javier Mejia.
Lead Roblox Developer · Luau
Senior Roblox gameplay engineer with 10+ years on the platform and a track record of shipping live-service titles across firebit, LFG Studio, Suit Up Games, and freelance work. I specialize in scalable, strict type-safe Luau architecture, server-authoritative systems, and the polish details that define great gameplay: combat, pets, customization, and live-ops engagement loops. Author and co-author of widely used open-source Wally packages (Replica, Maid, Util, ProfileDB, Analytics, Freshynoid, red). Comfortable owning features end-to-end across code, VFX, UI, and animation, and mentoring teammates as a technical lead.
50M+
Players Reached
10+ Yrs
Shipping Live Games
4 Studios
Led Programming At
10+
Roblox Titles Shipped
Skills
Specializations
Roblox Stack
Languages
Web & Backend
Tooling
Work History
Lead Software Developer
firebit
- Lead developer and designer on Farm Craze and Defend RV From Zombies, owning game architecture, gameplay systems, and live-service feature delivery end-to-end
- Define engineering standards, code review practices, and reusable system architecture across all studio projects
- Authored and maintained core open-source Luau packages used across every project: Replica (server-to-client state replication), ProfileDB (data persistence), red (gameplay framework), Maid, Util, and rojo-template (project boilerplate with GitHub Actions CI/CD)
- Ship live-ops content updates on a recurring cadence with iteration driven by player feedback and analytics
Lead Software Developer
LFG Studio
- Lead programmer across Sparkles Magical Market, Sparkles Roleplay, Noobz, Sweet Dreams, and an unannounced project (NDA)
- Designed and shipped a server-authoritative weapons system featuring combat/damage, perks, and projectile physics resilient to client exploitation and reused across multiple titles
- Built engagement and live-ops infrastructure: daily reward streaks, gacha/spinner, promo code redemption, marketplace and P2P trading, multi-currency economy, and tutorial/FTUE flow
- Co-authored open-source Wally packages: Analytics, DailyRewards, Freshynoid (performant AI NPCs), and Node-Graph
- Mentored junior engineers through pair programming, structured code reviews, and architectural guidance
Lead Software Developer
Suit Up Games
- Lead programmer on Nerf Extraction, Blippi's Playground / Find the Blippis, and the original Sparkles Magical Market (later transferred to LFG Studio)
- Contributed gameplay systems and features to Littlest Pet Shop and Max Mara Coats Adventure in collaboration with licensed brand partners
- Built a reusable company-wide project boilerplate with GitHub Actions CI/CD, accelerating new project bootstrap and standardizing deployment hygiene
- Collaborated cross-functionally with artists, QA testers, producers, and game designers to ship features on tight live-service cadences
Freelance Roblox Developer
Self-employed
- Launched live-service titles Survival Islands and Murder Escape as solo or lead programmer
- Authored open-source projects including red (gameplay framework), a Luau weapons module, and UIKit (UI component library)
- Delivered gameplay programming for short-form contracting projects across multiple studios