Senior Full Stack Engineer at ByteSparkles

Engineered and scaled MERN-stack platforms for fintech and health verticals, reducing average page load time by 38% using SSR with Next.js and code-splitting. Re-architected a monolithic Node.js API into domain-driven microservices behind an AWS API Gateway, cutting P95 response time from 820 ms to 190 ms. Built real-time collaboration using Socket.io and Redis Pub/Sub with zero message loss. Migrated from REST to GraphQL (Apollo) to reduce over-fetching by 55% and eliminate redundant frontend calls. Mentored junior developers, introduced trunk-based development with feature flags, improved testing to 92% coverage, and reduced production regressions by integrating Playwright E2E tests into CI.

Senior Full-Stack Engineer at ByteSparkles

Engineered and scaled MERN-stack platforms serving monthly active users in fintech and health verticals; reduced average page load time by 38% through SSR with Next.js and aggressive code-splitting. Re-architected a monolithic Node.js API into domain-driven microservices behind an API Gateway (AWS), cutting P95 response time from 820 ms to 190 ms. Built real-time collaboration features using Socket.io and Redis Pub/Sub, enabling concurrent sessions with zero message loss. Led migration from REST to GraphQL (Apollo Server/Client) reducing over-fetching by 55% and eliminating 40% of redundant API calls on frontend. Mentored 5 junior developers, introduced trunk-based development with feature flags (LaunchDarkly), and set up Storybook component library adopted across 3 product squads. Achieved 92% unit/integration test coverage with Jest and React Testing Library; integrated Playwright E2E tests into CI, reducing production regressions by 70%.

Senior Software Engineer at Hims & Hers Health

Built HIPAA-compliant patient-facing React dashboards for telehealth consultations, integrating Stripe for subscriptions and Twilio Video for in-browser video visits. Developed a Node.js/Express microservice for asynchronous prescription fulfillment using AWS SQS and Lambda. Optimized MongoDB aggregation pipelines and added compound indexes, reducing dashboard query time by 64%. Implemented OAuth 2.0 + JWT with refresh-token rotation and RBAC across six user roles. Shipped multiple A/B tests with cross-functional product/design collaboration, driving a lift in subscription conversion rate.

Full-Stack Engineer at Hims & Hers Health

Built HIPAA-compliant patient-facing React dashboards for telehealth consultations, integrating Stripe for subscriptions and Twilio Video for in-browser visits. Developed Node.js/Express microservice for asynchronous prescription fulfillment using AWS SQS + Lambda. Optimized MongoDB aggregation pipelines and added compound indexes, cutting dashboard query time by 64% for patient data. Implemented OAuth 2.0 + JWT authentication with refresh-token rotation and RBAC across 6 user roles. Collaborated cross-functionally to ship 12 A/B tests in 6 months, driving a 17% lift in subscription conversions.