Alex Johnson

• Architected and delivered a real-time collaboration feature serving 200K+ concurrent users with <1% error rate using WebSockets and Redis pub/sub.
• Reduced CI/CD pipeline duration by 47% through parallel job orchestration and caching strategies in GitHub Actions.
• Mentored 4 junior engineers through bi-weekly 1:1s; 3 were promoted within 18 months.
• Migrated legacy REST endpoints to GraphQL, cutting over-fetching by 60% and improving mobile load times by 1.8s (median).

• Built customer-facing dashboard from scratch (React + TypeScript) that became the company's primary revenue surface.
• Designed a micro-service authentication layer using JWT + refresh-token rotation, replacing a stateful session system.
• Optimized PostgreSQL queries and added composite indexes that reduced p99 response time from 3.2s to 340ms.

• Delivered 12 client websites using WordPress, Vue.js, and vanilla JavaScript on schedule with zero critical defects post-launch.
• Introduced automated integration tests (Jest + Playwright) that caught 8 regressions before deployments.

Relevant coursework: Algorithms, Distributed Systems, Machine Learning, Database Systems, Human-Computer Interaction.

Open-source observability dashboard (React + D3.js) aggregating metrics from Prometheus, Datadog, and CloudWatch. 1.2K GitHub stars.

Node.js CLI that generates accessible, type-safe React forms from JSON schema definitions. 8K weekly downloads.

AWS Certified Solutions Architect – Associate (2023) · Google Professional Cloud Developer (2022) · CKA (Kubernetes Administrator, 2021)