# Ethan Ensler > Full-stack Software Engineer Location: San Francisco, California, United States Profile: https://flows.cv/ethanensler I'm approaching a decade of experience as a software engineer in healthcare and biotech, as a self-taught programmer having come in with a background in biomedical engineering. I've also been a startup founder and engineering manager; at times I've stepped up to be product manager and UI/UX designer when needed. Through it all, I've stayed laser-focused on making a positive impact on people's lives, whether that be the end user or a colleague. Philosophically, I'm a believer in incrementalism; some of my favorite career challenges have been how to isolate the bad old stuff, polish up the good old stuff, and keep it all running while layering in the new stuff. I'd say my strengths are: lack of fear of diving head-first into new domains (or legacy codebases) and learning quickly; attention to detail, but understanding where it matters; and bringing humility to every fight. Dump of languages/frameworks/technologies: - Backend: Python (Django & Flask), Ruby (Rails), Node.js, Kotlin, C# - Frontend: Javascript/Typescript/React, GraphQL/Apollo, Redux, React Native, Angular 1, Backbone, jQuery - DevOps: Docker, Kubernetes, Terraform, Github Actions, Jenkins - Databases: PostgreSQL, Datomic ## Work Experience ### Senior Software Engineer @ Curai Health Jan 2025 – Present | San Francisco, California, United States ### Senior Software Engineer @ Invitae Jan 2021 – Jan 2024 | San Francisco, California, United States • Led team (plus did the UI design and UX research) to build a revamped interface and APIs for existing legacy Django application, speeding up main user workflow by 25% • Took ownership of Flask/RabbitMQ lab workflow orchestration system and developed and began executing on roadmap to address long-standing tech debt and performance issues • As part of ownership, initiated project, led team, and did UI/UX design to create a consolidated application to deprecate and replace 4 separate legacy UIs (iteratively across 4 phases) • Through user research, uncovered security and UX flaws in existing authn implementation of lab systems, and led project (including UX design and technical implementation) to replace system using hardware authenticators through Auth0 • Led project to productionize use case for a modernized lab workflow engine distributed system (Kafka / Kotlin) ### Senior Manager, Software Engineering @ Omada Health Jan 2021 – Jan 2021 | San Francisco, California, United States ### Software Engineering Manager/Team Lead @ Omada Health Jan 2019 – Jan 2021 | San Francisco Bay Area • Assumed ownership of legacy Rails + Angular app w/ React Native + Redux mobile app from departing engineers, hired two senior engineers for the team, and led project to modernize and commercialize a new behavioral health product to an on-time launch in 6 months • Served as interim product manager for 6 months when PM left the team • Led project team building EMR-like microservice for patient data ### Senior Software Engineer @ Omada Health Jan 2019 – Jan 2019 | San Francisco Bay Area • Led development on numerous large and small features, including a Facebook Groups-like social feature spanning web & mobile teams, productionizing use of Apollo & GraphQL • Led internal working group to define standards for GraphQL and microservice communication • Architected front-end rewrite of platform used by coaches and drove standards for usability ### Software Engineer @ Omada Health Jan 2016 – Jan 2019 | San Francisco Bay Area • Learned Rails & adopted pair programming + TDD while building member-facing web features • In first 2 months, created and documented new front-end patterns using React/Redux/Webpack/Mocha/Chai for monolith running primarily Backbone/Coffeescript • Led development on design system and drove expanded use in multiple apps • Migrated entire codebase (200+ files) using ASTs from slow CSS-in-JS solution to improve front-end performance, cut build time by 2x, and reduce unit test run time by 8x ### Software Engineer/UI-UX Designer (Front-End) @ Privis Health Jan 2015 – Jan 2016 • Ship production code of a complex, HIPAA-compliant private cloud application that manages ~1M patient lives, growing ARR by 2,500% to $3M (as of Aug 2016) • Reassured trust of a $480k ARR customer by fixing search UI design flaw within days of discovery during user testing; prototyped UI & built the front-end sections • Refactored 9000 line LESS file into componentized system with live-reloading Gulp build system to encourage consistent style reuse across team members • Personally led modernization of front-end infrastructure by implementing Gulp to audit coding standards & reduce test runtime from 3 mins to 30s (6x) • Rewrote critical data entry feature in 2 weeks to eliminate bugs causing data loss • On personal time, designed & open-sourced an interface to allow implementation of React.js on top of Durandal (Knockout-based JS framework), providing a workable migration path for moving away from deprecated framework ### Co-Founder & Front-End Developer @ SimpliFit Jan 2013 – Jan 2015 | Los Altos, CA For my startup, I designed and developed all customer-facing software and materials. This included: • Designed and built an entire AngularJS mobile web app from concept to beta in 3 months, with no previous AngularJS or mobile development experience (in the iOS and Android app stores) • Designed and built our fully-responsive modern website from scratch in a month, using the latest web technologies and a flexible Node.js/gulp build process (www.getsimplifit.com) • Designed and built a React-based web application with a Node.js view-layer, to talk to a REST API (built by my co-founder) • Designed and built a fully responsive Wordpress theme for our blog (blog.getsimplifit.com) I also have done my share of HTML/CSS/jQuery/PHP pages for quick-and-dirty user testing, along with automated Google Scripts. I developed SimpliFit's logo, branding & investor materials, as well as design guidelines for our products to keep them consistent. Finally, I spent time researching behavior change and conducted user testing for mobile UI/UX. ### Systems Verification Engineer @ Hospira Jan 2012 – Jan 2013 | Lake Forest, IL • With less than 1 year of experience, led 4-person team from start to finish in 6 months to test new battery to replace old one for 75k units in the field • Rapidly learned electrical engineering principles to take charge of 6-person testing team to test hundreds of low-level product requirements • Along with another colleague, drove the recruitment and training of 12 team members, tripling the size of our team in < 6 months • Became team expert on environmental testing based on military standards • Worked closely with project managers and systems engineering team to fix requirements, overcome design challenges, and reduce schedule risks ### Information Technology Consultant @ City of Evanston Jan 2010 – Jan 2011 Image, install software, and update OS for desktop computers and peripherals for office employees Assist in managing Active Directory accounts and domain workstations—approximately 300 users ### Engineering Intern @ Optovue, Inc. Jan 2010 – Jan 2010 | Fremont, CA • Collaborated with cross-functional departments to facilitate release of change orders • Participated in company’s process updates to be in continued compliance with FDA GMP and 21CFR Part 11. • Organized documents using Windchill PLM for system containing hundreds of parts • Created presentations, flow diagrams, and updated documents to facilitate training of engineering change order process ### Information Technology Technician @ Northwestern University Office of Undergraduate Admissions Jan 2008 – Jan 2010 Troubleshooted employee computer problems and perform maintenance—four per week Imaged and set up desktops and laptops for office use—about three per week Created and continually updated network map for about 150 users and 20 servers Devised and implemented inventory system requiring Microsoft SQL databases—approximately 500 items at 4 sites ## Education ### Bachelor of Science in Biomedical Engineering Northwestern University ## Contact & Social - LinkedIn: https://linkedin.com/in/ejensler - Website: http://www.github.com/ejensler --- Source: https://flows.cv/ethanensler JSON Resume: https://flows.cv/ethanensler/resume.json Last updated: 2026-04-01