JACE SLEEMAN
Backend & Full-Stack Software Engineer
Rutledge, Tennessee | Remote only
jacesleeman603@gmail.com
github.com/thejacedev
linkedin.com/in/jace-sleeman-b65ab0205/

SUMMARY
Backend and full-stack software engineer with professional and freelance experience since 2019. Builds dependable backend systems, real-time products, public APIs, and developer tools.

EXPERIENCE
Software Developer, Complex Gaming | September 2025 - Present
- Build and operate player-facing systems in a live multiplayer environment.
- Work across real-time gameplay features, persistent state, live deployments, production debugging, and performance work.
- Support systems used by a network reaching roughly 4,000 peak concurrent players.

Freelance Software Developer | 2019 - 2025
- Delivered custom systems and operational tooling for online communities.
- Built persistent data workflows, gameplay systems, and administration features.

SELECTED WORK
McHeads API | github.com/thejacedev/McHeads-API
Self-hosted Node.js/Express REST API generating Minecraft player heads, avatars, and body renders for Java and Bedrock editions. Uses image processing, Mojang and GeyserMC integrations, and SQLite or PostgreSQL-backed caching. Approximately 10 million monthly requests served.

Noteriv | github.com/thejacedev/Noteriv
Open-source markdown knowledge workspace built on Tauri 2 with a Rust native layer, Next.js renderer, plugin API, Git/WebDAV sync, and MCP server.

ImgPlayGround | github.com/thejacedev/ImgPlayGround
Native desktop application for image-generation workflows across six providers, with bulk runs and local Git-tracked storage.

TECHNICAL CAPABILITIES
Java, JavaScript, TypeScript, SQL, Bash, C#, Rust
PostgreSQL, MySQL, MongoDB, Redis
React, Next.js, Docker, Linux, Git, Gradle, Maven, REST APIs
Distributed systems, real-time systems, MCP/LLM integrations
Paper, Spigot, Bukkit, Velocity, BungeeCord, NMS, ProtocolLib