[BOOT] Initializing system...

[AUTH] Operator verified: JOHN GUERRA

[LOAD] Loading modules: Java, TypeScript, Python, Rust, C++

[NET ] Frameworks online: Spring Boot, Netty, React, Electron

[INFR] Infrastructure: Docker, K8s, AWS, Cloudflare

[ OK ] All systems nominal. Ready for tasking.

OPERATOR LAREDO, TX

JOHN GUERRA

BACKEND SOFTWARE ENGINEER

Building and operating production systems in Java. Strong foundation in networking, distributed systems, APIs, and performance engineering — managing live systems serving thousands of concurrent users.

FOCUS Backend Systems, Java, Distributed Architecture
EXPERIENCE 5+ years in production environments
SCALE Built systems handling 7K+ concurrent users
CLIENTS Mineplex, content creators with 8M+ subscribers
EDUCATION B.S. Software Engineering — WGU (2026)
LOCATION Laredo, TX — open to remote

CORE

Java

Spring

Netty

K8s

AWS

PgSQL

◈ VIEW EXPERIENCE ⟐ GET IN TOUCH ⌗ GITHUB

AUG 2023 → PRESENT ● ACTIVE

SOFTWARE ENGINEER

GEKKOQUEST // CONTRACT

→ Contracted by Mineplex (Guinness World Record–holding server network) to improve production anti-cheat system (GWEN) — enhanced heuristics, server-side movement validation, and packet order inspection while architecting its next-generation replacement
→ Built custom multiplayer game servers in Java with Netty for content creators with 8M+ subscribers, deploying across 3 production environments on dedicated infrastructure
→ Scaled platform to support 7,000+ concurrent players during a viral launch, diagnosing and resolving performance bottlenecks and memory leaks within 24 hours
→ Maintained 99.9% uptime through proactive monitoring, incident response, and JVM tuning

JavaNettyJVM TuningAnti-Cheat

FEB 2020 → SEP 2025 ○ COMPLETE

BACKEND DEVELOPER

DRAGONBALL ONLINE GLOBAL // REMOTE

→ Maintained and extended backend systems for an online multiplayer platform with an active global playerbase, working with legacy client code and limited documentation
→ Resolved a 2-year-old client stability issue causing daily crashes — used ProcMon to identify excessive disk I/O as root cause, reducing I/O by 60% and eliminating CPU spikes
→ Built real-time anti-cheat service in Python receiving player data from C++ game servers; automated bans for speed hacking via heartbeat validation
→ 5-year tenure shipping weekly patches and monthly releases — improved player satisfaction by 40%, grew active users by 15%

PythonC++CI/CDPacket Analysis

EXPECTED 2026 ◐ IN PROGRESS

B.S. SOFTWARE ENGINEERING

WESTERN GOVERNORS UNIVERSITY

OPERATIONAL SVC-001

STELLA

AI VTUBER CO-HOST

AI VTuber co-hosting live Twitch streams. Real-time processing pipeline integrating Whisper STT, GPT-4o, and Azure TTS with VTube Studio for synchronized speech, emotion, and Live2D avatar control across 20+ emotional dimensions.

+60% ENGAGEMENT

2x VIEWERSHIP

20+ EMOTIONS

Whisper STTGPT-4oAzure TTSVTube StudioLive2D

VISIT STELLA ↗

OPERATIONAL SVC-002

KIKICOPY

REAL-TIME FUTURES TRADE COPIER

Electron desktop app copying trades from a leader Tradovate account to multiple followers in real time via WebSocket. Position-delta mirroring, full order replication with brackets and SL/TP. Secure OAuth with Cloudflare Worker proxy and per-account risk management.

ElectronTypeScriptWebSocketOAuth 2.0Cloudflare

GITHUB ↗

OPERATIONAL SVC-003

WALLET

ZERO-KNOWLEDGE PASSWORD MANAGER

Spring Boot password manager with full client-side encryption via Web Crypto API (AES-GCM, PBKDF2 100k iterations). Server stores only ciphertext. Passwordless email auth, IP-based anomaly detection, auto-lockout, rate limiting, and Cloudflare proxy.

JavaSpring BootMongoDBWeb Crypto API

GITHUB ↗