Roman Herrera
Senior Full‑Stack Engineer
About
Senior full-stack engineer with 10+ years of experience designing and delivering production systems that turn complex data into intuitive products. Specialized in front-end development (TypeScript, React, Next.js) with equally strong back-end expertise (Node.js, Python, PostgreSQL, MongoDB). Deep experience building AI-powered, data-driven applications and scaling platforms to national reach. Proven technical leader and CTO who mentors engineers, champions developer experience, and has helped secure multi-million dollar funding rounds. Passionate about developer experience, automation, and using code to simplify the complex.
Core Skills
Professional Experience
- Engineered national‑scale real‑estate intelligence pipelines that ingest zoning, property, and permit data for 300+ US cities, ranking opportunities with LLM‑driven scoring; drives a React application where users refine leads in real time.
- Led an ETL migration to PostGIS, enabling millisecond geospatial filters and eliminating third‑party GIS fees.
- Cut map‑tile costs by 50 % and improved first‑paint speed by 20 % by re‑platforming from Mapbox REST to TileServer‑GL on AWS.
- Reduced production incidents by 65 % through end‑to‑end test automation, CI/CD gatekeeping, and mentoring 2 junior engineers—maintaining a 2 % rollback rate on more than 2000 merged PRs.
- Accelerated fundraising by crafting technical demos, data rooms, and investor pitches that helped leadership secure a multi‑million‑dollar seed round.
- Co‑created Deepblocks Pro, a WebGL 3D zoning modeller in React that lets real estate developers iterate massing studies live; shortened feasibility analysis from days to seconds for hundreds of thousands of users.
- Architected a multi‑tenant subscription engine that boosted ARR by 22 % YoY while slashing churn‑induced support tickets by 30 %.
- Built ChatDB, a LangChain‑powered chat interface that generates graphs, ranking tables, and maps on demand; drove 40 % higher user engagement and opened a new analytics upsell tier.
- Integrated financial modelling into Deepblocks Pro, enabling instant pro forma calculations and scenario comparisons that influenced $500 M+ in development decisions.
- Developed a React dashboard that optimised import/export routes, cutting freight spend by 15 % for beta customers; the technology sold for six‑figure acquisition within 18 months.
Certifications
XFM110 - Technical Fundamentals of Generative AI
Stanford - Feb 2025
Credential ID 0x7332eA1229c11C627C10eB24c1A6F77BceD1D5c1
Education
JAE Higher Polytechnic Institute
Recent Projects
AIM Engine
A platform to deliver off-market leads for commercial and residential real estate.
Deepblocks Pro
A platform that provides a comprehensive market overview for real estate development planning across 200+ cities.
ChatDB
A chat interface that provides on-demand graphs, ranking tables, and maps using historical data for market selection decisions.
Cryptongo
An engaging educational game designed to teach you about cryptocurrencies and blockchain technology.