# Sergey Morozov

> I know what I'm doing and I do it well

Location: McLean, Virginia, United States
Profile: https://flows.cv/sergeymorozov

## Work Experience
### Principal Software Engineer @ Capital One
Jan 2024 – Present | McLean, Virginia, United States
- TypeScript (React/Lit, TanStack, Cypress), Python (FastAPI), Kubernetes, AWS‬
‭- Maintained a business-critical machine learning platform for a Fortune 100 company‬
‭- Achieved 80% test code coverage and addressed 8 months of technical debt‬
‭- Maintained best in class availability, with proactive end-user support

### Senior Software Engineer @ Blueberry Pediatrics
Jan 2022 – Jan 2023
- TypeScript (React, Next, Chai), Tailwind, Python (Django), Redis, PostgreSQL, GCP
- Created an SPA for doctors to remotely diagnose and prescribe medication to children
- Automated component and E2E Cypress tests with 100% coverage of essential business logic
- Maintained production database, including backups, migrations, and query profiling
- Optimized AI generated code performance by 3 times

### Engineering Manager @ Alltrue
Jan 2020 – Jan 2022
- JavaScript (Vue, Chai), Tailwind, PHP (Yii), Redis, Elasticsearch, MySQL, GCP
- Diagnosed production failures and improved performance of an ecommerce site (72M hits/day)
- Increased the max number of concurrent users on the site by 12 times
- Reduced SPA/API unit and integration test time from 10 to 6 minutes
- Balanced order fulfillment workload with sales and inventory projections

### Senior Software Engineer @ BloomNation
Jan 2018 – Jan 2019
- PHP (Magento), JavaScript (React, Node), GraphQL, Redis, Elasticsearch, MySQL, AWS
- Worked around limitations and reduced service costs of third party APIs (15M hits/day)
- Trained a machine learning model to prioritize custom floral arrangements over stock images
- Introduced unit tests for code stability and feature flags for smooth deploys
- Automated AWS resource instantiation and alerts for post-release monitoring

### Engineering Team Lead @ Wag
Jan 2017 – Jan 2018
- PHP (Laravel), JavaScript (jQuery), MySQL, AWS
- Maintained the API for the most popular dog walking app (7M hits/day)
- Sped up continuous integration and deployment pipeline from 15 to 3 minutes
- Mentored, trained, and developed onboarding materials for 10 engineers
- Developed a coding challenge, reviewed all solutions, and conducted technical interviews

### Full Stack Engineer @ Dev.xyz
Jan 2015 – Jan 2016
- PHP (Zend), JavaScript (jQuery), Redis, MySQL, AWS
- Maintained the API for a $50M lead generation platform (400K hits/day)
- Improved internal reporting performance from 1 hour to 15 minutes
- Refactored legacy system source code down to 40% of the original size
- Visualized key performance indicators over time and market sectors


## Contact & Social
- LinkedIn: https://linkedin.com/in/serg-mo
- Website: https://github.com/serg-mo

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Source: https://flows.cv/sergeymorozov
JSON Resume: https://flows.cv/sergeymorozov/resume.json
Last updated: 2026-04-05