JoJo: Steel Ball Crusaders (Multiplayer Systems Project)

Multiplayer, real-time game systems project demonstrating distributed systems, client–server architecture, and production-style software ownership

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Overview

JoJo: Steel Ball Crusaders is a multiplayer game project built on the Roblox platform, where I designed and implemented real-time, networked gameplay systems with a strong focus on reliability, state synchronization, and performance under live multiplayer conditions.

The project is actively developed and tested in a real-world production environment, with live players, continuous iteration, and rapid debugging cycles based on observed runtime behavior.

This repository represents a systems-oriented software engineering project, not just a game.

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Key Technical Highlights

Real-Time, Distributed Software

• Designed client–server gameplay architecture with authoritative server logic
• Implemented network-synchronized ability systems with strict consistency guarantees
• Managed real-time visual effects lifecycles across multiple clients
• Ensured deterministic behavior under latency and player churn

Reliability & State Management

• Built robust cooldown, resource, and state validation systems to prevent desynchronization
• Solved complex issues involving:
  • Player death and respawn
  • UI state persistence across character resets
  • Preventing invalid state transitions in live sessions
• Defensive programming to handle partial failures and unexpected client behavior

Software Ownership & Iteration

• Responsible for the entire software lifecycle:
  • Design
  • Implementation
  • Debugging
  • Live testing
  • Refinement based on observed runtime behavior
• Regularly closed the feedback loop between:
  • Design assumptions
  • Actual multiplayer runtime performance

Architecture & Code Quality

• Modular system design (ability registry, cooldown manager, VFX system)
• Clear separation of concerns between:
  • Gameplay logic
  • Networking
  • Presentation
• Designed extensible systems to support rapid prototyping of new abilities

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Networking & Distributed Systems Experience

While implemented within Roblox’s networking model, the project demonstrates core distributed systems concepts applicable beyond game development:

• Client–server message passing
• Server-authoritative validation
• Latency-aware design
• Synchronization of transient and persistent state
• Security-minded design (preventing client-side authority exploits)
• Highlight: many major VFX do not exist on the server. The server simply tells all clients to render them, thus saving the server's processing power.

These concepts directly translate to large-scale distributed systems like those used in satellite communications and real-time networked services.

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Collaboration & Leadership

• Led a cross-disciplinary team of contributors:
  • Environment builders
  • Asset researchers
  • Animators
• Defined technical constraints and interfaces so non-programmers could work independently
• Acted as sole software engineer, owning all programming decisions and integrations
• Practiced clear written communication through documentation and internal coordination

This mirrors real engineering environments where software engineers collaborate across disciplines.

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Technologies & Languages

• Primary Languages: Lua (Roblox)
• Concepts:
  • Real-time systems
  • Distributed state synchronization
  • Client–server architecture
  • Event-driven design
  • Debugging live systems
• Tools: Roblox Studio, Git/GitHub

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Why This Project Is Relevant to Employers

This project demonstrates:

• Ability to build highly reliable, real-time software
• Comfort working in distributed, networked environments
• Strong engineering fundamentals and problem-solving skills
• Full ownership of production software used by real users
• Willingness to iterate rapidly and handle changing requirements

While the application domain is a game, the engineering challenges mirror those found in real-world, large-scale systems — including networking, reliability, performance, and state management.

Some content from the game:

Fully playable game link (working on PC, IOS, and Android): https://www.roblox.com/games/118168989887674/JoJo-Steel-Ball-Crusaders#!/game-instances

Repository Visibility Note

This repository represents a sanitized and shareable subset of the full project.
Additional details, architecture discussions, and live demonstrations can be provided upon request. (Now available on Mobile)

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Author

ChillinTurt
Software Engineering Student (Graduating 2025–2026)
Strong background in C++, Python, C#, Lua, and real-time distributed systems

JoJoSteelBallCrusaders

Generated by Rojo 7.5.1.

Getting Started

To build the place from scratch, use:

rojo build -o "JoJoSteelBallCrusaders.rbxlx"

Next, open JoJoSteelBallCrusaders.rbxlx in Roblox Studio and start the Rojo server:

rojo serve

For more help, check out the Rojo documentation.