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ShadowEsu/README.md

Preston Susanto

EECS student, independent reinforcement-learning researcher, and founder building practical AI products.

I work at the intersection of AI, product engineering, and education—turning ambitious ideas into shipped, testable experiences. I am currently studying Electrical Engineering & Computer Science at Diablo Valley College, researching reward shaping for accessible AI tutoring, and building Regrade.

Portfolio · LinkedIn · Regrade · Email

What I use

Product engineering: TypeScript, React, Next.js, Vite, Tailwind CSS, Electron
Backend & infrastructure: Node.js, Express, Python, Supabase, PostgreSQL, GitHub Actions
AI work: LLM integrations, prompt and context design, model-routing experiments, reinforcement learning

Selected work

Project What I built Stack / focus
Regrade A student-facing product that analyzes graded work against a rubric to surface potentially recoverable credit and support a respectful appeal workflow. React, TypeScript, Vite, Supabase
Unvibe A desktop-first companion that explains AI-assisted code changes in context and helps developers retain what changed. Electron, TypeScript, Next.js, Supabase
Repo Doctor An OpenAI Hackathon project exploring healthier, more understandable code repositories. OpenAI Hackathon 2026
Vigilante Competitive-intelligence monitoring for pricing, filings, hiring pages, and product updates, with sourced daily briefs. Next.js, Supabase, mobile clients
Meridian AI LLM cost intelligence: usage tracking, per-key budgets, alerts, and model-routing experiments. Node.js, Express, Supabase, Python
Sortify A gamified waste-sorting experience using AI classification, location tools, and leaderboards. React, TypeScript, Gemini

Currently building

  • Regrade — more transparent, student-centered grade review.
  • Unvibe — comprehension tooling for the era of AI-assisted development.
  • Accessible AI tutoring research — investigating reward shaping for community-college learners.

Evidence, not buzzwords

  • Built and shipped projects across AI, education, developer tools, sustainability, and competitive intelligence.
  • Earned three awards at SF Hacks 2026 for Sortify, including Best Hardware and Best Beginner.
  • Maintaining a 4.0 GPA while pursuing independent research and product work.

Collaboration

I am open to internships, research collaborations, hackathons, and technically ambitious product work. If you are building something useful with AI, education, or developer tools, I would love to compare notes.

Every project here is presented with its current status; I prefer clear scope, working demos, and honest documentation over inflated claims.

Pinned Loading

  1. meridian-ai meridian-ai Public

    Meridian AI — LLM cost intelligence, budgets, virtual keys, and ML routing

    JavaScript

  2. OpenAIHack-Repo_Doctor OpenAIHack-Repo_Doctor Public

    Repo Doctor — OpenAI Hackathon 2026 project for healthier, more understandable repositories

  3. Sortify_App Sortify_App Public

    Sortify — AI-powered waste sorting with gamified learning and location-aware disposal guidance

    TypeScript

  4. Unvibe Unvibe Public

    Unvibe — a desktop companion for understanding and retaining AI-assisted code changes

    TypeScript

  5. Vigilante Vigilante Public

    Vigilante — competitive intelligence monitoring. Launch site + waitlist + product app.

    TypeScript

  6. YC_regrade YC_regrade Public

    Regrade — student-centered AI grade review and rubric analysis

    TypeScript