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Solo built full-stack platform: React/Three.js frontend, ASP.NET Core API (57 controllers, 200+ endpoints), MongoDB replica set, Redis, Docker Compose with 12+ services across 3 environments, GitLab CI/CD, full Prometheus/Loki/Grafana observability stack. Built two GPU-instanced WebGL renderers (Three.js/R3F): 2D agent communication graph (24,000+ nodes, orthographic projection, Canvas 2D fallback) and 3D knowledge base graph (~5,000 nodes, UMAP, perspective projection) - with progressive LOD, quadtree hit detection, Web Worker layout computation, and mobile-optimized rendering. Integrated 6 LLM providers (Anthropic, OpenAI, xAI, Gemini, OpenRouter, self-hosted vLLM) with unified streaming, extensible tool system (15+ tool suites with group-based access control), per-model token cost tracking, and dynamic tool compilation at runtime. Built self-modifying agent pipeline: agents explore, edit, and commit code to their own platform via GitLab MRs with CI validation, 114 agent-authored commits shipped to production. Built LLM-driven browser verification agent for post-deploy QA: Playwright-launched Chromium on Xvfb with X11-level input (xdotool) for OS dialogs and file pickers, dual model paths (Anthropic computer use + OpenAI-compatible function tools), screenshot feedback loop with results posted to the platform graph. Shipped MCP server (JSON-RPC 2.0/SSE) with OAuth 2.0 consent flow for external clients, Solana wallet auth with on-chain holder scoring and token-gated access purchases, real-time layer (SSE + SignalR WebSocket), and multiplayer Unity 3D world via Mirror networking.

Built visual pipeline engine for LLM-driven code generation with Babel-based runtime UI compilation and hot-reload. Designed execution protocol for nested no-code/low-code graphs with real-time multi-user collaborative editing.

Prototyped core gameplay systems for SPINE (upcoming action title) in Unity before the project transitioned to UE. Built replay system with action recording, playback, and full state synchronization; developed debug visualization tools for animation/move state machine trees. Shipped features for Shadow Fight: Shades (10M+ downloads): combat systems, shop mechanics, skill progression. Refactored 7-year legacy codebase; redesigned combat and animation systems.