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Girum Hagos
Senior Front-End Developer specializing in React/Angular and cloud-native healthcare apps
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About
Senior/Lead Frontend/Full-Stack engineer in Toronto with proven experience shipping high-stakes, real-time and regulated products across healthcare, legal/compliance, and fintech. Built a real-time compliance dashboard that survived a 400% data spike and a no-code workflow builder supporting 500+ nodes, with strong emphasis on performance engineering, type-safe architecture, and automated quality/rollout practices.
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Key Strengths
- Led end-to-end launch of real-time healthcare compliance dashboard; handled 400% throughput increase without crashes
- Deep real-time performance optimization (rAF batching, Web Workers, virtualization) reducing re-renders by 80%+ and eliminating UI jank
- Scalable frontend architecture (modular micro-frontends, siloed state stores) enabling rapid onboarding (4 devs productive in first week)
- Quality engineering at scale (CI quality gates, 90%+ coverage targets, E2E automation, Lighthouse performance budgets)
- Built complex no-code workflow builder with normalized state + type-safe node models; reduced logic-related bugs by 60% and supported 500+ nodes
- Strong rollout/experimentation discipline (feature flags, dark launch, canary release, telemetry-driven iteration) improving fintech enrollment to 95%
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