SDE II @ Traya Health - 3+ years engineering NestJS microservices, React/Next.js platforms, and AWS cloud infra.
I start from the backend: NestJS microservices, service boundaries, and the AWS infrastructure (EC2, RDS, Nginx, CI/CD) that keeps them running, then build the React/Next.js interfaces on top. I tend to end up owning the parts of the system where correctness actually matters: payment reconciliation, recommendation ranking, SSO - the stuff where a bug isn't a bad review, it's a support ticket at 2am.
A high-performance URL shortener with sub-millisecond redirects, smart caching, custom expiry, and automated cleanup - plus real-time geo/device analytics and JWT-based role auth.
A high-performance HTML/Markdown-to-PDF rendering service with custom templates, header/footer injection, webhooks, and sub-second PDF generation powered by headless browser workers.