Split Personas
Building CorpRaiders — isometric cyberpunk tactical co-op in Unity. Procedural worlds, online multiplayer, persistent consequences.
UnityNetcodeProcedural WorldsState Sync
About
Computer scientist with 20+ years of professional experience. I translate unstated needs into resilient, high-impact systems — from enterprise AI tooling and RAG pipelines to multi-tenant SaaS and real-time game infrastructure.
Programming since age 10 on a Commodore 64. Most recently at the ABC Innovation Lab building AI tooling for newsrooms. Now founder at Split Personas under PolymorphicIT, shipping CorpRaiders — cyberpunk tactical squad co-op with procedurally generated worlds. Available for select contract work.
Current ventures
PolymorphicIT
Principal systems architect — AI agents, solution design, contract software engineering, and technical leadership.
AI AgentsSolution DesignC# / .NETTypeScript
Experience
Founder & Game Developer — Split Personas
Lead architect and developer on CorpRaiders. Procedurally generated worlds where mission outcomes feed persistent state. Real-time netcode and deterministic sync in Unity.
UnityNetcodeProcedural GenerationOnline Co-op
Principal Systems Architect — PolymorphicIT
Contract engineering, AI agent implementations, solution design, and technical leadership. Parent company for Split Personas and client-facing delivery.
AI AgentsMicroservicesAPI DesignTechnical Leadership
Senior Software Engineer — ABC Innovation Lab
- Cross-system AI Chrome extension — ~6 months of sprint time saved, rapid newsroom adoption.
- RAG pipelines for video content (Gardening Australia) — searchable metadata and knowledge graphs.
- Video Chapters platform with embedded quizzes — used nationwide in high schools.
- Prompt engineering, LLM evaluation, React/TypeScript, Docker, Azure/GCP.
RAGLLMReactTypeScriptAzureGCP
Senior Solutions Consultant — CauseIS
Complex integrations, APIs, and microservices for not-for-profit clients on the iMIS ecosystem. Technical anchor for the delivery team.
Earlier roles
Information Systems Manager & lead developer at University of Sydney; contractor at Artis Group; senior developer at Praxa Ltd; computer scientist at Q-Free (underground cashless toll systems).
Selected projects
CorpRaiders — Split Personas
Cyberpunk, isometric tactical squad game in a Shadowrun-style setting. Manage mercs, run jobs for creds. Procedurally generated worlds — mission outcomes and player choices feed back into each world's state.
UnityProcedural WorldsNetcodePersistent StateOnline Co-op
Booka.work — Multi-tenant SaaS
B2B2C booking platform for salons and solo pros (~86% complete). High-concurrency scheduling with strict tenant isolation, real-time calendar sync, and Stripe payments.
Next.jsPostgreSQLLISTEN/NOTIFYTenant IsolationRedisStripek6
Newsroom AI Extension — ABC
Chrome extension unifying siloed enterprise systems into an AI testing harness. Alt-text automation, content workflows, rapid editorial adoption.
RAGChrome ExtensionReactTypeScriptLLM
Core stack & capabilities
Architecture & AI
System DesignMicroservicesRAGAI AgentsPrompt EngineeringLLM Evaluation
Back-end & Data
C# / .NETNode.jsTypeScriptPostgreSQLGraphQLEvent-Driven
Front-end & Cloud
ReactNext.jsDockerAzureGCPAWSCI/CD
Game Dev
UnityNetcodeState SyncProcedural WorldsOnline Co-op
Contact
Contract enquiries: info@polymorphicit.com.au · Personal: hello@mattheff.me · +61 466 954 545
Download résumé (PDF)