Looking for a job

Juan Hernandez

@juanhernandez5

Message

I build local-first AI workbenches, RAG systems, and full-stack software.

Argentina

Message

What I'm looking for

I'm looking to build local-first AI, LLM, RAG, agentic, and full-stack systems where I can validate real workflows, ship durable software, and deepen my work in multimodal AI and engineering.

I build local-first AI and software engineering systems, including SupporterAI Core v1.0-Alpha, a workbench combining local LLM inference, hybrid RAG, vector-backed memory, MCP/tool orchestration, and durable project state.

In private R&D for SupporterAI, I use Python, FastAPI, JavaFX, llama.cpp, GGUF, and Qdrant to orchestrate 80+ tools and capabilities. I validate autonomous engineering workflows through seven canonical gates covering execution, recovery, checkpoints, tests, diffs, and durable continuation.

I also research local-first multimodal model systems through SAItron and build practical software projects with C#, Unity, React, Next.js, Node.js, and PostgreSQL. My public work includes game plugins, code-review tooling, YOLOv11 training, and the PyHelper PyPI package.

Experience

Work history, roles, and key accomplishments

Current

Multimodal Model Systems Research

Current

SAItron

Jan 2026 - Present (8 months)

Designing and validating a local-first multimodal architecture spanning three primary model systems: cognition, perception/world modeling, and generation, coordinated through asynchronous routing, verification, and resource-aware execution. Completed two TIES model-merging experiments across Nemotron-based H0 and Qwen-based H1, preserving expected logical behavior in both candidates and multimodal

Multi modal Systems Hybrid Model Merging Ties Nemotron Qwen LLamacpp Vulkan Asynchronous Routing Verification Resource Aware Execution

Current

AI Engineer / Full Stack Developer

Current

SupporterAI

Jan 2025 - Present (1 year 8 months)

Building a local-first AI workbench with Python/FastAPI, JavaFX, GGUF/llama.cpp runtimes, Qdrant-backed RAG/memory, and MCP/JSON-RPC integrations. Engineering hybrid semantic and lexical retrieval with embeddings, reranking, context pruning, long-term project memory, planning/replanning, and orchestration across 80+ registered tools and capabilities.

Python fastAPI Java FX GGUF LLamacpp Qdrant RAG MCP JSON RPC Embeddings Reranking Pruning Planning Orchestration

Current

Software Engineer / AI Project Developer

Current

Selected Software Engineering & AI Projects

Jan 2023 - Present (3 years 8 months)

Developed OverhaulCrafter, a unified C#/Unity/BepInEx/Harmony plugin for The Planet Crafter spanning RPG, QoL, NPC, and quest systems, with the current release build compiling with 0 warnings and 0 errors. Engineered ZombiesDeOP7DtD, a C#/Harmony perception and diagnostics system using source analysis and decompilation, including physical line of sight, audio occlusion, and deterministic runtime e