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AndresL230/README.md

Hey there! I'm Andres Lopez

About Me

I'm a Computer Science student at Boston University, class of 2028, and I build things people actually use. Right now I'm engineering payments and AI document-extraction infrastructure at an early-stage startup, and studying machine learning through Cornell Tech's Break Through Tech program.

  • Currently engineering at Grove Tax, working on payments infra and AI document extraction
  • AI/ML Fellow at Break Through Tech @ Cornell Tech, and backend at Hack4Impact BU
  • Previously co-founded Recost, an API cost-intelligence platform
  • Eagle Scout · based in Boston, MA
  • Connect with me on LinkedIn

Current Focus

  • Shipping payments and AI extraction infrastructure at Grove Tax
  • Building out Sapling Learn, now in closed beta at BU, with a pitch at the Neurotech Frontiers Summit this fall
  • Deepening my ML work through the Break Through Tech industry challenge project
  • Interested in developer tooling, fintech infrastructure, and anything where correctness actually matters

Featured Projects

Sapling | CivicHacks BU '26, AI Tutor Track Winner

An AI study platform that builds a live knowledge graph as you learn. Three tutoring modes (Socratic, Expository, Teach-back), adaptive quizzes driven by per-concept mastery data, syllabus-to-assignment extraction, and study rooms for comparing progress with classmates. Currently in closed beta at BU.

Scale: 166 API endpoints · 47-table Postgres schema · 18 LLM agents · 1,050+ tests

Key Features:

  • Live knowledge graph that grows as you learn new concepts
  • Adaptive quiz generation from per-concept mastery data
  • Syllabus parsing with automatic assignment tracking and calendar integration
  • Study rooms for comparing progress with classmates
  • Application-layer AES-256-GCM encryption on sensitive columns, with numeric-preserving decryption for grades

Tech Stack: TypeScript Next.js React Python FastAPI Google Gemini PostgreSQL Supabase D3.js

Live: saplinglearn.com | GitHub: View Project | Devpost: View Submission

Recost | HackIllinois '26, Best Web API (Stripe Track)

An API cost-intelligence platform for developers: analyze codebase API usage, estimate cost, detect inefficiencies, and generate optimization suggestions. Co-founded and incorporated as a Delaware C-corp with a 3-person team; launched on Product Hunt. Won the Stripe-sponsored Best Web API track, the second-largest sponsor track at UIUC's flagship hackathon (677 participants).

Key Features:

  • Serverless REST API with 30+ endpoints on Cloudflare Workers (Hono, D1), Google OAuth, API key management, KV-based rate limiting
  • VS Code extension using web-tree-sitter to parse JS/TS/Python and detect N+1 hotspots, batching and caching opportunities, and cross-file call origins
  • Node.js and Python SDKs intercepting outbound HTTP at runtime to capture cost and latency telemetry across 8+ providers
  • Interactive dashboard with D3.js visualizations for API spend, risk heatmaps, and optimization insights
  • Endpoint-level risk assessment with cacheable pattern detection and estimated savings calculations

Tech Stack: TypeScript Cloudflare Workers Hono D1 KV React D3.js VS Code Extension API Tree-sitter

GitHub: View Project | Devpost: View Submission

noogie | PennApps XXVI, Best Design

A node-cluster visualization platform that collects, deduplicates, clusters, and summarizes breaking news from across the web to mitigate media bias and show the complete picture of an event.

Key Features:

  • Multi-source news collection via RSS feeds and web scraping
  • Smart deduplication using sentence embeddings and FAISS vector indexing
  • AI-powered clustering and headline generation with OpenAI GPT-4o
  • Interactive D3.js node visualization for exploring news clusters

Tech Stack: TypeScript React D3.js Python Flask OpenAI GPT-4o Supabase FAISS

GitHub: View Project | Devpost: View Submission

Eyrie | HackHarvard '25, Best Use of Cloudflare

A real-time crowd monitoring system using AI-powered drones to detect dangerous crowd formations and predict crowd crush events before they occur, giving authorities critical minutes to respond.

Key Features:

  • Multi-source WebRTC streaming from drones with real-time person detection overlays
  • YOLOv8 detection with high-accuracy bounding boxes
  • Spatial density analysis using Gaussian kernel algorithms with normalized coordinates
  • Predictive alerts and interactive D3.js risk heatmaps with time-series analytics

Tech Stack: TypeScript Next.js React D3.js Python FastAPI YOLOv8 aiortc WebRTC OpenCV PyTorch Cloudflare

GitHub: View Project | Devpost: View Submission

Also worth a look

  • TaxForm Automation: Gemini-powered extraction for W-2 and 1099-NEC/INT/DIV forms, built on Cloudflare Workers with source highlighting, arithmetic validation, and an audit trail. React TypeScript Vite Cloudflare Workers
  • ETL Pipeline: modular Python ETL with automated validation, quality checks, and production logging. Python Pandas
  • Stock Portfolio Insights: full-stack portfolio tracker with real-time analytics and AI-generated risk assessment. React Flask Python

Technologies & Tools

Python TypeScript JavaScript Java C SQL

React Next.js Node.js FastAPI Flask D3.js PyTorch OpenCV

Cloudflare AWS Docker PostgreSQL Supabase Stripe Git GitHub Actions

Anthropic OpenAI Gemini

Also working with: Model Context Protocol (MCP), RAG + FAISS, model evaluation, Tree-sitter, Apache Airflow, WebRTC, Hono.

Achievements

  • Best Web API (Stripe Track) | HackIllinois '26 | Recost
  • AI Tutor Track Winner | CivicHacks BU '26 | Sapling
  • Best Design | PennApps XXVI | noogie
  • Best Use of Cloudflare | HackHarvard '25 | Eyrie
  • Eagle Scout · HSF Scholar · MLT Career Prep Fellow · SEO Edge · Dean's List

Let's Connect!

LinkedIn GitHub Devpost Portfolio


Pinned Loading

  1. etl-pipeline etl-pipeline Public

    Python 1

  2. ruslannnn2/noogie ruslannnn2/noogie Public

    Node-cluster visualization platform for world news

    Python 3

  3. recost-dev/extension recost-dev/extension Public

    VS Code extension that parses your codebase for API usage patterns and surfaces cost and optimization insights in your editor.

    TypeScript 9