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Syed Moosa Hassan
Staff Full-Stack Engineer & System Architect specializing in distributed systems and microservices
South San Francisco, CAStaff Software Engineer/Manager, E-commerce18 years experienceStaffBiotechnologyE-commerceTechnology
ScreenedIdentity Verified
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About
Player-coach engineer/leader with experience at Twist Bioscience and Series B startup Vida Health, owning high-impact platform work across frontend and backend. Delivered a large-scale permissions migration to Okta affecting ~100,000 users and led reliability/process improvements (weekly releases, dedicated QA/dev environments, incident response with RCA) in high-growth environments.
Experience
Staff Software Engineer/Manager, E-commerceTwist Bioscience
Lead Full Stack EngineerTwist Bioscience
Lead Staff Full Stack EngineerMeta
Senior Full Stack EngineerFacebook
Lead ConsultantApple Maps
Software EngineerVida Health
Software EngineerIntel Corporation
Senior Systems EngineerQualcomm Inc.
Lead Consultant - Apple MapsApple
Software Engineer - Vida HealthVida Health
Technical Program Manager - Intel CorporationIntel Corporation
Senior Systems Engineer - Qualcomm Inc.Qualcomm Inc.
Intern Systems EngineerQualcomm Inc.
Education
University of Coloradomaster, Interdisciplinary Telecom Program (2007)
University of Engineering & Technology, Lahorebachelor, Electrical & Computer Engineering (2002)
Key Strengths
- Led large-scale auth/permissions migration from Rails/MongoDB to Okta for ~100,000 users
- End-to-end ownership across frontend (React), backend (Rails), and migration scripts with legacy support during cutover
- Performance-minded engineering (introduced caching to avoid sign-in slowdowns)
- Player-coach leadership with ~50/50 management and hands-on delivery
- Improved delivery cadence (weekly releases vs every 2–3 weeks) via release-manager runbooks
- Reduced sprint length from 3 to 2 weeks and reported ~30% fewer bugs through structured team syncs
- Designed and shipped scalable vector/gene search using ElasticSearch and large-scale indexing tradeoffs
- Owned production incident response for overload scenario (5000+ sequence uploads), including mitigation, customer coordination, and prevention (limits + circuit breaker)
- Led modernization of a legacy e-commerce monolith into a scalable microservices/platform architecture
- Strong technical discovery: dependency mapping, data-flow analysis, and risk/bottleneck identification
- Drives cross-functional delivery using Agile/Scrum with high transparency (Jira/Confluence/Slack)
- Production issue diagnosis using observability/telemetry (Sentry, LogRocket, New Relic) and structured troubleshooting
- Authentication/identity troubleshooting experience (Okta), including policy/configuration root-cause analysis
- Effective technical workshops/demos for developers with hands-on live coding and end-to-end architecture walkthroughs (APIs, CI/CD, IaC, monitoring)
- Manages distributed teams/time zones with overlap planning and detailed handoffs
- Balances delivery with tech-debt reduction by advocating for dedicated refactoring time
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