Kelvin Julian
Lead Game Engineer with strong expertise in scalable Unity systems and clean architecture.
See My Works ↓ or
Download My CV 
Citampi Stories
Role: Project Technical Lead
Studio: Ikan Asin Production
Platform: Mobile (Android & iOS)
Performance: 6M+ downloads, 15K DAU, 35% D1 retention, 10% D7 retention
A narrative-driven life-sim RPG with millions of downloads. I led the technical architecture, systems design, and core engineering direction across multiple major updates while building tooling and pipelines that enabled non-engineers to deliver content quickly and safely.
Cisini Stories
Role: Project Technical Lead
Studio: Ikan Asin Production
Platform: Mobile (Android & iOS)
Performance: 2M+ downloads, 10K–20K DAU, 35% D1 retention, 9% D7 retention
A narrative-driven life sim expanding the Citampi universe. I started the initial architecture for the project, led technical direction, core systems engineering, content pipeline development, and performance optimization across platforms.
Soul Shift
Role: Programmer
A Puzzle platformer 3 day gamejam entry for the Game Dev League August 2022 Jam, Winning 2nd place out of 50 entries
Goodbye
Role: Programmer
Finalist in the University of Indonesia’s Indie Game Ignite Competition
Plane Strike
Pure Java (Swing) • Custom Game Engine • No External Dependencies
A fully custom-built 2D action shooter developed entirely with pure Java Swing, showcasing low-level engine design without relying on external libraries.
Created a custom game framework from scratch, including the update loop, render pipeline, and frame-rate independent timing model.
Implemented a GameObject component architecture, enabling modular behaviors, reusable logic, and clean extensibility.
Quantitative Finance Backtesting Framework - Personal
Dart • Python • Lua
A modular, multi-language quantitative trading research framework designed for strategy development, simulation, and statistical evaluation.
Developed a complete backtesting engine with plug-and-play indicators, portfolio models, signal generators, and execution rules.
Implemented a custom multi-language binding layer enabling seamless communication across
Dart : server orchestration
Python : analytics, plotting, machine-learning-based evaluation
Lua : strategy scripting with fast reload and sandboxing
Supports both message passing and remote function execution.
Built a dataset processing pipeline for OHLCV data, featuring windowed transformations, rolling statistics, and custom feature engineering.
Integrated statistical performance metrics, including Sharpe, Sortino, Calmar, max drawdown, volatility, and benchmark comparison.
Lua Game Framework Wrapper
A custom lightweight framework built on top of LÖVE2D, designed to provide modern engine-like structures such as scenes, game objects, components, and UI features. Built a full OOP-style architecture in Lua, including classes, inheritance, and encapsulated behaviors without relying on external dependencies. Implemented a GameObject component system inspired by Unity, allowing modular behavior composition with clean lifecycle methods. Designed a Scene Management system supporting transitions, loading screens, pausing, and isolated scene contexts.