Daniel Whitfield
Software Engineer
Summary
Software engineer with 6 years building and scaling full-stack web applications in TypeScript, React and Node.js. Ships production features end to end, owns reliability, and reduces cost — cut API latency 60% and infra spend 30% at a 4M-user SaaS.
Experience
- Architected the notifications service into an event-driven queue (Node.js, SQS), cutting p95 latency from 900ms to 210ms and scaling throughput to 12m events/day.
- Led migration of the core React application to TypeScript, reducing UI regression bugs by 41% quarter-over-quarter across 8 engineers.
- Engineered contract tests and automated a GitHub Actions CI/CD pipeline, accelerating release cadence from weekly to daily across 12 months with zero rollbacks.
- Built a self-serve analytics dashboard (React, GraphQL, PostgreSQL) adopted by 78% of enterprise accounts within 6 months.
- Optimized database queries and deployed Redis caching, slashing average dashboard latency from 3,400ms to 1,100ms (68% reduction).
- Engineered third-party integrations for Salesforce and HubSpot, reducing client onboarding time from 5 days to 6 hours.
- Delivered 20+ production features across a Python/React stack in an Agile team of 5 engineers, closing 9 story points per sprint.
- Increased unit and integration test coverage from 34% to 78%, eliminating 15+ critical regressions across 12 months.
