Mouseîon · stevenvallejo.com
Software engineer · Philosopher
Think before you build. Systems that hold up what they say they do.
"Abstraction is not stepping away from the problem. It is seeing it from the exact height."Hire me
Each project is a thesis: on logic, complex systems or software that drives revenue.
12+ years of backend, agentic AI, devtools and business software.
The technical jewel, live: write in Spanish → autologic (rule-based NLP formalizer) translates it → ST executes it (a logic language with a home-grown CDCL SAT solver, 6,333 tests). No AI, no database: it all runs in-process, serverless on Vercel.
Showcase of the personal AI stack: Jarvis v1/v2 (RAG over ChromaDB, 14B–70B models), local GGUF chat via llama-cpp-python, an MCP swarm on Ollama (deepseek-r1 + qwen2.5) and a GPU OCR PDF→Markdown converter. Static docs in Next.js 15: no models run on the server.
Docs and showcase of OSS devtools for Linux: Ultimate Terminal (browser-based distributed machine control), Mission Center Web (Electron-free resource monitor), clawbar (voice + Hyprland status bar with Whisper/Kokoro) and Hyprland Multi-Monitor (independent per-monitor workspaces). Astro Starlight, fully static.
Multi-tenant platform for Discord communities: web portal (events, library, ranking, store and roles), a NestJS 10 API over Neon Postgres and a discord.js bot with XP and voice rewards. A single codebase and database for many communities isolated by tenantId.
Commercial landing for a suite of three ready-to-customize SMB starter kits: CRM (React + Vite + Express), Hours Tracker (Next.js 15 + Turso) and VPN Manager (Flask + Docker). Model: "80% is already built, you pay for the 20% custom". Fixed-scope sale or micro-SaaS.
SaaS app for freelance time tracking and Colombia-localized invoices: single or bulk entry, income calculation with configurable rate, PDF export, weekday filters and average-based autofill. Next.js 15 + SQLite.
CRM for Colombian SMBs with 19 entities: kanban pipeline, contacts, companies, deals, activities, quotes and invoices. Localized for tax ID, COP, departments and company types. React 19 + Vite + Express + Neon Postgres, deployed on Vercel.
Legislative document indexer with full-text search: adapts scraping to Colombia’s House and Senate and the DR Chamber of Deputies via a swappable Source Adapter pattern that never touches the pipeline. FastAPI + Neon Postgres + Mangum on Vercel serverless.
Warehouse and inventory management system: stock, orders, movements, roles (admin/manager/worker), notifications and analytics. React 19 + Vite + Neon Postgres on Vercel serverless functions, with seed demo data to start instantly.
Full-stack editorial platform (Next.js 16 + Neon/Postgres + Firebase Auth): publishes papers, archives research and runs collective experiments with real-time visualization, with a /studio panel for editorial CRUD behind real auth. The name evokes paradox, but the product is scientific publishing infrastructure.
The judgment that shapes everything else.
Digital humanities portal with 227 static MDX routes: Classical Greek (morphology, translations, glossary), Neurophilosophy (210 files across 10 modules) and Philosophy of the City. Next.js 15, no database, fully static — built to be read and cited as academic material.
Offline PWA to moderate academic and competitive debates: manages turns, timer, scoring and fallacy detection, and bundles a dynamics simulator with a cellular automaton (2D canvas) inherited from the complex-systems research.
Complex systems, emergence, simulation.
Interactive educational catalogue of 16 repos on complex systems, emergence and scientific computation: coupled ABM and ODE models, a home-grown emergence metric (EDI) and its grounding in operative structural realism. 22 SSG pages, no database, fully static.
Doctoral thesis (Jacob Agudelo + Steven Vallejo, UdeA) in philosophy of science and complexity sciences: proposes "pre-ontological structures" as operative regularities prior to objecthood, anchored in a dynamic material substrate and validated with the EDI metric and multiscale compression over multi-domain evidence. Quantitative rigor and ontological grounding in a single program.
Production business software: the Prizma suite.