Rosa Delgado
Full-Stack Developer · Columbus, OH · rosa.delgado@example.com · linkedin.com/in/rosadelgadodev
Summary
Full-stack developer with 6 years shipping complete product features across React/TypeScript front ends and Node.js/PostgreSQL back ends. Built a customer portal serving 25K users solo, cutting support tickets 40%, and designs APIs 3 internal teams build against. At home across the whole path: schema design, API contracts, UI state, deployment pipelines, and the production monitoring that keeps it honest.
Professional Experience
Full-Stack Developer · Fernworks
Feb 2023 – Present
- Shipped a customer self-service portal serving 25K users solo — React/TypeScript front end, Node.js/PostgreSQL API, deployed on AWS — cutting support ticket volume 40%.
- Cut p95 API response time from 900ms to 180ms by fixing N+1 queries, adding read-path caching (Redis), and indexing from real query plans.
- Designed the public REST API (OpenAPI-first, versioned) now integrated by 14 enterprise customers, with breaking-change policy that has held for 2 years.
- Raised checkout completion 9% by rebuilding the payment flow end to end: idempotent server retries, optimistic UI, and failure-state recovery across both layers.
- Cut deploy-to-production time from half a day to 15 minutes by building the CI/CD pipeline (GitHub Actions, containerized deploys, smoke gates) the team still runs on.
Web Developer · Ohio Mutual Group
Jul 2019 – Jan 2023
- Rebuilt the agent quoting tool (jQuery to React + Node.js API), cutting quote completion time 45% for 800 daily internal users.
- Migrated the policy-document service from a legacy SOAP integration to a queued REST design, eliminating a class of timeout failures (300+/month to zero).
- Introduced automated testing (Jest, Supertest) to a zero-test codebase, reaching 70% coverage on the quoting path and cutting regression bugs 50%.
Projects
Side project: splitfare.app
- Built and operate a trip expense-splitting PWA (Next.js, PostgreSQL, Stripe) with 4,000 monthly active users and $400 MRR — designed, shipped, and maintained solo.
Technical Skills
- Frontend: React, TypeScript, Next.js, HTML/CSS (Tailwind), state management (TanStack Query), accessibility (WCAG AA)
- Backend & operations: Node.js (Express, Fastify), PostgreSQL & Redis, REST & OpenAPI design, AWS (ECS, RDS, S3), Docker & CI/CD (GitHub Actions), monitoring (Datadog)
Certifications & Education
- B.S. Computer Science, Ohio State University — May 2019