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Hi, I'm Nikson Rotondaro

Full-Stack Software Engineer

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About me

Full-Stack Software Engineer who ships end-to-end — PostgreSQL to Docker/cloud. Delivered GTM/GA4 for 900+ e-commerces (Cognizant / Google), front-end on an international product team (Pixelmatters), and independent AI products in production.

Impact by the numbers: Imóvel Radar catalogues 17,740+ rentals; Maceió Cine Bot cut session payloads ~112KB → ~8KB; Job Hunter AI scores ~1,000 listings for ~$0.13; nikson.dev cut LCP by ~2s.

Based in Maceió, Brazil (BRT). Open to remote and international roles. Portuguese (native), English (C1), Spanish (C1).

Work experience

Roles spanning product engineering, automation, analytics, and front-end.

Feb 2026 – Present

Independent Developer

Self-Employed · Remote — Maceió, Brazil

  • Shipped 4 production products: Nerdy Story, Imóvel Radar (17,740+ listings), Job Hunter AI, and Maceió Cine Bot.
  • Built Nerdy Story semantic grading with multi-model failover and an LLM eval harness (~125 cases/domain).
  • Architected Imóvel Radar as a Turborepo monorepo (FastAPI + Telegram + Next.js + Neon) on Oracle Cloud.
  • Rebuilt nikson.dev on React Router v7 SSR — cut LCP by ~2s by removing animation from the LCP element.

Apr 2025 – Feb 2026

Freelance Automation Engineer

Self-Employed · Remote — Maceió, Brazil

  • Designed automation workflows with AutoHotkey v2 and AdsPower for repetitive browser and desktop processes.
  • Built scripts for browser profiles, task orchestration, data handling, and long-running workflow reliability.
  • Translated manual processes into repeatable programmatic automation with error handling and sync.

Aug 2022 – Mar 2023

Pixelmatters

Front-end Engineer · Porto, Portugal (Hybrid)

  • Contributed to BrightAction architecture decisions — Vite, SSR, and JWT authentication.
  • Team reference for Tailwind CSS and TanStack Query; built a Storybook component library.
  • Translated Figma handoffs into pixel-accurate production components; daily English collaboration with US clients.
  • Presented Cypress vs. Playwright E2E comparison; Jest coverage discipline on Quantic (quantic.edu).

Aug 2021 – Mar 2022

Cognizant

Web Analytics Analyst · Remote — São Paulo, Brazil

  • Delivered GTM and GA4 for 900+ international e-commerces in 6 months — averaging 7 clients/day.
  • Configured custom events, dataLayer adaptations, and conversion tracking on WordPress and Magento.
  • Primary technical contact for Spanish-speaking clients; authored English reports for Google stakeholders.

Jun 2021 – Nov 2021

SoftWrap

Front-end Developer · Brazil

  • Built web and mobile apps with React.js, React Native/Expo, and REST/GraphQL integrations.
  • Developed TV Shelf, a React Native app for tracking watched series; implemented from Figma designs.

Projects

Selected independent products — AI, automation, and production bots.