# Sergii Garkusha > Senior Software Engineer | 500 Startups Alumni Location: Cupertino, California, United States Profile: https://flows.cv/sergiigarkusha Building software since 2011. Former scientist turned full-stack engineer. 500 Startups Alumni | Envato Elite Author | Runner | Ukrainian Proficient in JavaScript/TypeScript and Python, with over a decade of web development experience. Passionate about creating impactful solutions and exploring everything web-related. Key Achievements: • 500 Startups (B20) Alumni • Envato Elite Author • Authored a book on the history of fencing art of Ukrainian Cossacks Languages: JavaScript, TypeScript, Node.js, Python, Go Frameworks: React, Express, Koa, Next.js, Flask, FastAPI, Django Environments: macOS, Linux, Docker, Docker Compose, Kubernetes, AWS Databases & ORM: MongoDB, Mongoose, PostgreSQL, MySQL, SQLAlchemy, Redis ## Work Experience ### Senior Software Engineer @ First Approval Jan 2024 – Present | San Francisco Bay Area ### Senior Software Engineer @ HubSpot Jan 2023 – Jan 2024 | San Francisco Bay Area ### Software Development Engineer III @ Workday Jan 2018 – Jan 2021 | Pleasanton, California, United States ### Full Stack Software Engineer @ SentiSum Jan 2017 – Jan 2018 | 500 Startups Del Norte - San Francisco, California SentiSum is a 10 people startup originated from London, the UK. They primarily focus on the Sentiment Analysis of a text. That was a company where I was the most experienced Web developer. I was working together with the Product Officer and was in charge of the team of 4 to do the Web part. With this awesome company, we went together through the Acceleration Program of 500 Startups in San Francisco. Contributions: - Led the team of 4 engineers - Architected next version of the core product (the Dashboard) - Successfully migrated the product from Meteor.js to Featers - Built backend services: auth, feature extractor, query gen, etc. Tech Stack: - React.js / Webpack / Ant.d / Socket.io - Node.js / Feathers.js / Mongoose / MongoDB - Docker / AWS (EC2, Lambda) / NginX - Java 8 / Spring ### Co-Founder, Full Stack Engineer @ PhoenixTeam Jan 2014 – Jan 2018 | Kyiv, Ukraine PhoenixTeam is a small Tech company with a focus on the development of the premium website templates, WordPress themes, and plugins for royalty-free sales via Envato Marketplace. Contribution: - Project management - Creation of product concepts - The architecture of the products - Front End development - Full stack theme and plugin development - DigitalOcean droplet management - Ubuntu LEMP stack management - Support management - Creation of continuous delivery schemes for products - Version control system integration - Git submodules management Tech Stack: - Ubuntu LEMP Stack (NginX / MySQL / PHP FPM) - DigitalOcean (Droplets) - WordPress / Node.js / jQuery / Grunt.js / Envato API ### Full Stack Software Engineer @ Zentist Jan 2016 – Jan 2017 | 500 Startups Del Norte - San Francisco, California Zentist uses AI to get accurate treatments to patients while offering high-quality and affordable dental care. That was a full-time contract position focused mostly on Frontend development. Contributions: - Led the remote team of 6 people - Architected the new version of the frontend (Based on React) - Fixed frontend build process (e.g., PHP-SASS to Webpack) - Helped with migration from Symphony to Flask. Tech Stack: - Angular.js / jQuery / Bootstrap / SASS - PHP FPM / Symphony2 / MySQL - AWS / NginX Migrated to React.js+Redux / GraphQL / Flask later. ### Full Stack Web Developer @ MotoCMS.com Jan 2013 – Jan 2016 | Mykolaiv, Ukraine MotoCMS.com is a company providing beautifully designed website templates - each and every template is bundled with the awesome MotoCMS admin panel. I worked closely with the Product person on the project called MotoPress, the WordPress Page Builder, and played a key role in making decisions about the planning of the work. Contributions: - Architected and built the MotoPress live demo - Developed charts functionality - Integrated Maps functionality - Created an instant help system of the plugin Tech Stack: - jQuery / JMVC / Bootstrap 3 / LESS - PHP / WordPress / WP Plugins API / MySQL - Ant / Grunt.js / QUnit - Debian 6.0 (squeeze) ### Framework Engineer @ Creative Web Solutions Jan 2012 – Jan 2013 | Kyiv, Ukraine Creative Web Solutions is a small Tech company based in Mykolaiv, Ukraine. It main specialization is a development of the premium website templates, WordPress themes, and plugins for royalty-free sales via Envato Marketplace. Contributions: - Architected and implemented a CWS theme framework from scratch - Developed whole theme back-end and all javascript features on front-end - Helped with the Themeforest review process - Helped with theme support Tech Stack: - jQuery / Bootstrap 3 / LESS - PHP / WordPress / WP Plugins API / MySQL - Ubuntu 13.04 ### Front End Developer @ ArtMyWeb Jan 2011 – Jan 2012 | Mykolaiv, Ukraine Contributions: - Created up to 20 WordPress based websites - Helped newcomers with learning of HTML, CSS, and JavaScript Tech Stack: - jQuery / Bootstrap 3 / LESS - PHP5 / WordPress / WP Plugins API / MySQL - Gentoo Linux ### Html Coder @ Deluxe Corporation Jan 2011 – Jan 2011 | Mykolaiv, Ukraine This was my first job in Tech back in days. Contributions: - Developed 5 complex storefronts from scratch - Created a CSS framework for the department Tech Stack: - jQuery / Custom-made HTML 4 / CSS2 Framework - .Net Web Framework ### Research Scientist @ Mykolaiv Regional Museum of Local History Jan 2008 – Jan 2011 | Mykolaiv, Mykolaiv Obl, Ukraine Duties: Scientific work in the field of acquisition of museum collections, research, exhibition and educational activities based on the individual plan. Research on problems of the Middle Ages and Renaissance on the Ukrainian lands. Scientific publications on the research topics. Complementation of the museum's materials, participation in process of cataloging, organizing and studying of them. Participation in the creation of expositions, the development of research briefs, concepts, thematic plans. Participation in research and educational activities, scientific meeting, seminars, conferences. Conduction of tours and lectures. ## Education ### Full-Stack Software Engineering Program Holberton School Jan 2018 – Jan 2018 ### Batch 20 in Early-stage Startups 500 Startups Jan 2017 – Jan 2017 ### Master’s Degree in History Mykolaiv State University Jan 2003 – Jan 2009 ## Contact & Social - LinkedIn: https://linkedin.com/in/sergio-garkusha - Website: https://garkusha.dev - Website: https://garkusha.substack.com - GitHub: https://github.com/sergio-garkusha --- Source: https://flows.cv/sergiigarkusha JSON Resume: https://flows.cv/sergiigarkusha/resume.json Last updated: 2026-03-22