MA

Marcos Hernanz

Software Engineer & Competitive Programmer. National Olympiad Finalist. Building high-performance apps with React Native & Next.js.

Madrid, Spain (Open to Relocation)

Website

@MarcosHernanz

Joined December 2021

3 Followers

0 Following

AI Insights & Achievements

42/ 100

Growth

9 new projects with 20 stars.

Consistency

25 day streak.

Veteran

Coding for 5 years.

Profile README

Hi there, I'm Marcos 👋

Software Engineer & Competitive Programmer based in Madrid. I build scalable products with modern stacks and enjoy solving complex algorithmic problems.

Current Status: Looking for Summer 2026 Internships in SF/US. 🇺🇸 J-1 Visa Eligible (Self-Funded / Sponsorship Ready).

🏆 Competitive Programming & Algorithms

Ranked among the top algorithmic problem solvers globally.

Codeforces: Max Rating 1800 (Expert). (Top ~5% globally).
Meta Hacker Cup: 3x Top 2,000 Global Rank (Round 2 Qualifier).
ICPC SWERC: 2x Regional Finalist (Southwestern Europe).
Spanish Olympiad in Informatics (OIE): National Finalist.
Madrid Regional Olympiad: 🥈 Silver Medalist.

🚀 Featured Projects

ChatVault: Local-first semantic search engine. Runs a BERT model in-browser using Rust + Wasm.
CalYo: AI-powered nutrition tracker with Computer Vision (React Native + Convex).
Cogniba: Brain training platform with 2,000+ users (Next.js + Supabase).
MiniLift: Local-first workout tracker powered by MMKV.