ivasmigins(verified on Roblox)

Ivan ArcosFounder & Senior Engineer

I've been building on Roblox since 2018, and the games I've shipped have passed 1.5 billion visits between them, from The Mimic at 1.3 billion to Wonderland, which I co-founded and led to a 72,000 concurrent-user peak. I build systems for live games at scale, plus low-level systems, drivers and embedded firmware.

Open to collaborations, freelance and new game projects

View work Get in touch

Projects

Click any project for details.

Wonderland

Co-founder, project lead and lead engineer. Launched August 2026, peaked at 72,000+ CCU.

View project

The Mimic

Lead Programmer and Game Designer on a Roblox horror game with 1.3 billion visits.

Dark Deception: Hunted

Development and live ops at Exclusible on the official Dark Deception Roblox game, 152M+ visits.

Rabbids: Takeover

Live ops engineer on Ubisoft's Rabbids team-PvP Roblox game, built with Exclusible.

Barbie DreamStyle

One of two engineers on the approved proof of concept for Mattel. The full game is now live.

Clean Crew

Live ops at Exclusible on a co-op cleaning game.

Conductor

The private Roblox template my games start from: module lifecycle, typed networking, and a check loop for failures that are silent at runtime.

Arduino I²C Temperature Sensor

C firmware reading an I²C sensor, streaming over UART to a live web dashboard.

Python MQTT Broker

An MQTT broker in Python ingesting sensor data into a MariaDB datastore.

Flask RESTful API with HTTPOnly Cookies

Cookie-authenticated Flask API backing a health-tracking website and smartwatch.

ESP32 WiFi Manager

A C++ singleton that manages WiFi connectivity and HTTP requests on the ESP32.

Monster Mayhem

A Roblox game where you play a monster destroying maps and fighting the military.

Tide Riders

A retro-style physics-based jetski racing game in Roblox (circa 2020).

x86-64 Assembly Calculator

A console calculator written in x86-64 assembly with floating-point arithmetic.

Linux Character Device Driver

A Linux kernel module driving a 16-segment display and buttons on a Raspberry Pi.

POSIX Semaphores Roller Coaster

A multithreaded roller-coaster loading simulation in C using pthreads and semaphores.

Lua Graph Generator

A Lua console app that pulls API data and renders graph PNGs with oocairo.

Roblox In-Game Catalog System

An in-game catalog for Roblox that proxies the official catalog with caching and smooth UI.

Simple Recipe Finder App

A C#/XAML app that finds recipes and calculates their macronutrients via two APIs.

Art Leap by Belvedere Museum

Live ops at Exclusible on the Belvedere Museum's award-winning Roblox experience.

About

I'm a senior Roblox engineer and have been building on the platform since 2018. My focus is systems for live games at scale, from client/server architecture through to backends and data systems built to survive heavy traffic, launches and live updates.

I'm equally comfortable leading a team and working inside one, and I'm easy to work with. Pressure is where I do my best work, whether that's a launch day, a live incident, or an update going out to tens of thousands of players at once.

I spent most of my career writing every line by hand. Since agents got good I've gone all in on them, but only inside a process built to catch what they get wrong. I've set out how that works further down.

Alongside that I'm a 4th-year Computer Science student, working on low-level systems like device drivers, embedded firmware and concurrency in C.

AI Workflow

AI is central to how I work day to day. I run Orca as my agentic development environment, with Claude and ChatGPT as coding agents, and delegate real work to them, from feature implementation and test cases through to UI, boilerplate and documentation. What keeps it trustworthy is the process around it, not the agents themselves.

Orca: Agentic development environment
Claude: Coding agent
ChatGPT: Coding agent
Greptile: Automated code review
Delegated: Feature implementation, Test cases, UI, Boilerplate code, Documentation

How an agent-built feature ships

01
Project instruction files
Every repo carries the context an agent needs before it writes a line: conventions, architecture and the things it must not do.
02
Plan review before implementation
The agent proposes a plan and I review it first. Catching a wrong approach here costs minutes instead of a day.
03
One task per pull request
Scope stays small enough to reason about, so a bad change is easy to spot and cheap to revert.
04
Verification before review
The agent runs the test suite, checks the build and exercises the feature in the running product, then fixes what it broke. Reading code never proves that it works.
05
Automated review
Greptile or a reviewer agent does the first pass, catching the mechanical problems before a human looks.
06
Manual code review
I do the final pass myself, judging quality, performance and usability. Nothing ships on an agent's word alone.

The result is that I can move fast on unfamiliar code, spot problems early and give actionable feedback that keeps delivery moving.

Skills & Tools

Languages: Luau, C, C++, C#, Python, Assembly, JavaScript, TypeScript
Roblox: Replication, Networking, Anti-Exploit, Procedural Gen, Pathfinding, Raycasting, DataStores, Declarative UI, Optimization, AI
Luau Libraries: React Luau, Jecs, Trove, Signal, Promise, Observers, Component, ProfileStore, ObjectPool, Replica, Packet, Blink, CMDR, TopbarPlus, ShapecastHitbox, CameraShaker
Authored: Conductor, Marionette, InputContextHandler, SoundWrapper
Tooling: Rojo, Wally, pesde, Rokit, Selene, StyLua, UI Labs, Git
AI Workflow: Orca, Claude, ChatGPT, Greptile, Agent code review
Leadership: Team Lead, Project Lead, Hiring & Onboarding, Live Ops, Launch Management
Systems & Embedded: Linux, Linux Kernel, Raspberry Pi, ESP32, Arduino, GPIO, Concurrency, I²C / UART, MQTT
Web & Backend: Next.js, React, Tailwind, Flask, REST APIs, SQL / MariaDB

Experience

ScaryPlay (Wonderland)

2024 - Present

Co-founder, Project Lead & Lead Engineer

Co-founded the studio with The Mimic's founder and led a team of eight across engineering, modeling, animation, art and music, hiring and onboarding the engineers myself. Launched August 2026 and peaked at 72,000+ concurrent users. Roblox invited me to pitch it to investors at RDC 2026.

Exclusible

Jul 2025 - Present

Senior Engineer

Development and live ops on Dark Deception: Hunted (152M+ visits), Clean Crew, Art Leap for the Belvedere Museum and Ubisoft's Rabbids: Takeover. One of two engineers on the approved proof of concept for Barbie DreamStyle for Mattel, their biggest client to date, then part of the larger team that shipped the full game in September 2026. Also interview and onboard programmers.

The Mimic

2023 - 2025

Lead Programmer & Game Designer

One of two programmers on a Roblox horror game with 1.3 billion visits. Led programming on major updates that consistently drew around 70,000 concurrent users at release: boss fights, AI monsters, puzzles and scripted sequences in Luau.

Freelance

2018 - Present

Game Programmer

Freelance programming across a wide range of Roblox genres: RP, shooters, medieval, survival, simulators, tycoons and more.

Computer Science Student

Present

4th Year

Studying computer science, building low-level systems, device drivers, concurrency, embedded firmware and web backends along the way.

Connect

The fastest way to reach me is email, but any of these work.