# Harry Kran-Annexstein > Software Engineer Location: Miami, Florida, United States Profile: https://flows.cv/harrykranannexstein Software engineer that believes good design should permeate every aspect of the development process. I'm passionate about crafting digital experiences that users love. BS in Computer Science. Professional experience with software engineering - especially for the web (JavaScript / TypeScript, React / NextJS), automated test engineering, and UX design. ## Work Experience ### Senior Software Engineer @ Renew Jan 2024 – Present | Miami, Florida, United States ### Software Engineer (Founding) @ Zealthy Jan 2023 – Jan 2024 | Miami, Florida, United States - As first employee and engineer, led the architecture and development of Zealthy’s telemedicine platform, which scaled rapidly from zero to over 10,000 active patients and $1M monthly revenue within the first year. - Leveraged a modern application stack consisting of TypeScript / JavaScript / Next.js / React frontend deployed on Vercel and PostgreSQL / Supabase backend, enabling our small team to iterate quickly and get an initial product to market in less than 5 months while ensuring the security and continued scalability of our systems. - Scaled engineering team from 2 to 6 by conducting technical interviews and providing mentorship to new hires. ### Senior Software Engineer @ Buoy Health Jan 2022 – Jan 2023 | New York, New York, United States ### Software Engineer @ Buoy Health Jan 2018 – Jan 2022 | New York, New York, United States - Rebuilt symptom search experience for Buoy’s AI symptom checker chatbot using React and JavaScript, including advanced features like typeahead autosuggestions powered by AWS Elasticsearch backend. - As a subject-matter expert, played a key role in rapidly shipping a purpose-built coronavirus version of Buoy’s AI symptom checker chatbot as part of our COVID-19 response on behalf of the States of Massachusetts and Virginia (among other partners). https://www.wbur.org/news/2020/03/13/buoy-health-coronavirus-screening - Identified opportunity and led initiative to leverage emerging Progressive Web App (PWA) standards in order to make Buoy’s web apps installable alongside native apps without having to maintain and ship separate codebases. - Led company-wide accessibility initiative as engineering stakeholder. Performed accessibility audits alongside assistive technology users through Fable’s QA platform, then used insights to enhance the usability of Buoy’s web applications. https://makeitfable.com/buoy-health-accessibility-case-study/ - Led effort to enhance page-load performance of our Next.js (React) app which serves a library of high quality health and wellness content to millions of visitors, effectively cutting our p95 request latency in half (from a range of 250-350 ms to 100-150 ms per request). ### React Developer (Co-op) @ University of Cincinnati Jan 2016 – Jan 2016 | Cincinnati, Ohio - Collaborated on $46 million project to develop next-generation student information system, Catalyst, utilizing JavaScript, ReactJS, and react-router, which today is relied upon by nearly 50,000 students. - Provided student-centric User Experience insight during component design meetings, contributed 100+ design enhancements over multiple iterations. ### QA and Test Engineer (Co-op) @ iSqFt Jan 2015 – Jan 2015 | Blue Ash, Ohio -Revamped automated endpoint test suite in C#, .NET Core and NUnit; designed and implemented 100+ test cases, increasing code coverage by 15%. - Investigated and fixed over 200 broken tests by examining server error codes, consulting with developers, and comparing data used for test against what is expected by endpoint. - Worked with agile test team to perform manual release testing, producing more than 100 detailed bug reports. ### Web and UX Developer (Co-op) @ Barefoot Proximity Jan 2014 – Jan 2014 | Cincinnati, Ohio - Advised Fortune 50 clients on UX best practices across 10+ projects; used Axure to design and produce over 40 interactive widgets for high-fidelity webpage prototypes. - Contributed to successful worldwide launch of mobiloil.com, producing detailed UX deliverables (wireframes, sitemaps, and 100+ use cases documents), saving estimated $6,000 monthly by eliminating design ambiguity. - Collaborated with designers to conceptualize and produce Meet Barefoot using JavaScript, HTML5, and CSS3. Implemented dynamic content loading for modals, increasing website performance and reducing load times by over 1000%. ## Education ### Bachelor of Science (B.S.) in Computer Science University of Cincinnati Jan 2012 – Jan 2017 ### Walnut Hills High School ## Contact & Social - LinkedIn: https://linkedin.com/in/harryaka --- Source: https://flows.cv/harrykranannexstein JSON Resume: https://flows.cv/harrykranannexstein/resume.json Last updated: 2026-03-22