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MJ Kochuk
Staff Frontend Engineer specializing in React, TypeScript, and scalable UI systems
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About
Frontend-focused engineer operating at a staff level with experience at Amazon and startups, known for rescuing high-impact, frontend-heavy systems through architecture, performance, and quality improvements. Delivered outsized results including cutting load times from ~90s to ~3s, raising test coverage from <1% to >80%, and enabling multi-team adoption of modern state management via training sessions for 50+ engineers.
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Key Strengths
- Led end-to-end frontend architecture for a high-usage Amazon product (tens of thousands of daily users)
- Built schema-based rendering that reduced form creation time from days to hours with less developer involvement
- Drove test coverage from <1% to >80% via new CI/CD rules and testing methodology
- Cross-team enablement through large-scale frontend training sessions (50+ engineers across countries) driving adoption of Redux Toolkit
- Major performance turnaround: reduced micro-frontend load time from ~90s to ~3s using React performance work and caching (IDB) plus backend caching advocacy
- Established component + E2E testing with Cypress and improved observability/error detection with Sentry
- Strong product/process leadership: Scrum/agile facilitation, acceptance criteria definition, MVP scoping, and iterative rollout loops
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