SYS JS.IO
BUILD EYTJ4K
DATE 2026.04.25
UTC 23:23 UTC
LOC NYC → STANFORD
STATUS OPEN TO ML/SYSTEMS ROLES

Johnny Saldana

Backend & ML systems engineer. Founding engineer at RocketReach — contact-data infrastructure, email verification at scale, applied LLM/embedding pipelines. Currently in Manhattan; relocating to Stanford in September.

§ 01

Recent writing

Index →
2026.04.25
On building this

A short note on why I built a website now, after five years of not having one.

· meta· writing
§ 02

Selected work

All →
2020 — present

Founding Engineer

RocketReach

Owner of the credit-accounting subsystem (core revenue logic). Built and rebuilt the email verification stack, contact-data normalization pipelines, and the analytics warehouse. Production scale: hundreds of millions of records, multi-billion-row tables.

Tenure 5y+
Stack PYTHON · DJANGO · POSTGRES · REDSHIFT · AWS
2019 — 2020

Founder, Quantitative Finance Society

Johns Hopkins University

Founded JHU’s undergrad quant-finance society. Built systematic trading curriculum and ran a live $30K paper-trading book. WorldQuant Brain semi-finalist team.

AUM $30K
Result WORLDQUANT SEMI-FINALIST
§ 03

Currently

Now →

Reading Deep Learning (Goodfellow), grinding ML systems theory, and shipping a public-artifacts series on backend infrastructure I’ve built at RocketReach. Open to conversations about ML/systems hybrid roles in the Bay Area starting fall.