# Juan L. > Software Engineer Location: San Francisco, California, United States Profile: https://flows.cv/juanl Generalist engineer and creative problem solver with 16 yrs industry experience. Career highlights: • Worked at Retool, YC Top Startup #26 2023 • 1st eng hired at Standard Cognition, YC Top Startup #33 2019+2020 • Worked on ML for trading at a top 5 hedge fund (by AUM) • Built the SEC's modern quantitative forensic analytics system • Worked on software for military and commercial flight simulators • Started out doing telemarketing part time in high school and college • Four startups • BSc in Electrical & Computer Engineering from Carnegie Mellon • MSc in Computer Science from Georgia Tech Github: https://github.com/jlas Personal site: https://www.juanl.org/ ## Work Experience ### Software Engineer @ Retool Jan 2021 – Present | San Francisco, California, United States • Retool makes software development 10x faster, backed by Y Combinator and Sequoia • Created performance engineering function; made Retool >50% faster • Boosted dev productivity by migrating to ViteJS https://retool.com/blog/vitejs-migration • Contributions to new product lines including RetoolDB, Agents, Copilot ### Software Engineer @ Standard Cognition Jan 2017 – Jan 2021 | San Francisco, California, United States • Standard Cognition is automating checkout for retail, backed by Y Combinator and SoftBank • First tech hire • Tech lead for backend team • Contributions across various infra and product teams: perception & mapping, human tracking, product analytics, realtime core, computer vision, site reliability, embedded devices, mobile & frontend • Tenure spanned post Seed through post Series C ### Software Engineer @ U.S. Securities and Exchange Commission Jan 2015 – Jan 2017 | Greater New York City Area • Lead dev for the National Exam Analytics Tool (NEAT). • NEAT programmatically analyzes millions of trades to detect fraud. • Oversaw transition from prototype to production rollout to 1k+ enterprise users. • SEC Chair Mary Jo White on NEAT: “These efforts and others have enhanced our ability to reach more registrants, and more effectively use our limited examination resources.” [1] • Developed illustrative visualizations to easily spot suspicious trading. • Implemented 3NF relational database schema in kdb+/q to link raw and reference data. • Designed and built a B-tree based time series component to visualize HFT data. • Worked closely with quants and researchers to build analytical tools. • kdb+/q, python (pandas, numpy, flask), javascript (es6, react.js) [1] https://www.sec.gov/news/testimony/white-testimony-sec-agenda-fy2018-budget-request.html ### Software Engineer @ Coffeetheapp Jan 2015 – Jan 2015 | Greater New York City Area • Built professional networking webapp (think LinkedIn) with desktop & mobile responsive design. • Researched machine learning algorithms for recommending job candidates & professional matches. ### Software Engineer @ Lab49 Jan 2014 – Jan 2014 | Greater New York City Area • Developed enterprise (50k+ LOC) data-driven real estate management software (AngularJS v1). ### Software Engineer @ Kioos Jan 2013 – Jan 2014 | São Paulo Area, Brazil • First hire. Built MVP in 3 months: gamification solution for popular e-commerce platform Magento. ### Software Engineer @ Advanced Simulation Technology inc. (ASTi) Jan 2009 – Jan 2013 | Washington D.C. Metro Area • Developed real-time audio and DSP components in C. • Built URC-200 (MIL radio) remote control system: realtime driver in C talking to a web UI. • Built framework for automating VoIP clients at large scale (100+ clients), featuring: a distributed architecture (using the Actor model, via python-actors), and Zeroconf integration (via avahi). ### Software Engineer Intern @ JPMorgan Chase Jan 2008 – Jan 2008 | Greater New York City Area • Programmed test scripts in Java and Python for trading software. • Recommended and implemented automated reporting of test results. ### Signals and Systems Teaching Assistant @ Carnegie Mellon University Jan 2008 – Jan 2008 • Grade assignments and exams, proctor lab sessions, and hold office hours for a class of 130 students. ## Education ### Bachelor of Science - BS in Electrical and Computer Engineering Carnegie Mellon University ### Master of Science - MS in Computer Science Georgia Institute of Technology ## Contact & Social - LinkedIn: https://linkedin.com/in/juanlasheras - Portfolio: https://www.juanl.org - GitHub: https://github.com/jlas/ - Portfolio: https://www.juanl.org/resume.pdf --- Source: https://flows.cv/juanl JSON Resume: https://flows.cv/juanl/resume.json Last updated: 2026-04-11