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oscarenas/README.md

Oscar Arenas — Senior Software Engineer · Next.js · Node · TypeScript · AI/LLM. 14+ years shipping web products for global brands — now building AI‑augmented experiences. Bogotá, Colombia · open to remote (LATAM · US · EU) · available for new opportunities.



View resume Download CV (PDF) LinkedIn Email me

¿Prefieres español? La hoja de vida también está en resume-oscarenas.web.app/es.


14+ years shipping web products for global brands · 90 product squads adopted my component libraries · 12 engineers mentored on TypeScript, accessibility and Core Web Vitals · 251 hours of certified learning in 2025 across 13 credentials


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01 · About

I build web products that hold up in production — and, lately, the AI layer on top of them. My core stack is Next.js, Node.js and TypeScript, on a strong frontend foundation in React, design systems, accessibility (WCAG 2.2) and web performance.

  • AI in production — LLM‑powered product flows on the OpenAI and Anthropic APIs: conversational and generative features, prompt engineering and structured outputs that behave under real usage. I also use AI every day for coding, review and delivery, without giving up clean architecture.
  • Frontend architecture — at Publicis Sapient I led the front‑end architecture for Fortune 500 clients and built component libraries adopted across 90 product squads.
  • Leadership — I lead cross‑functional squads, have mentored 12 engineers on TypeScript, accessibility and Core Web Vitals, and turn ambiguous problems into measurable impact.
Now Senior Technology Engineer at Publicis Global Delivery (Publicis Sapient network) — experience‑led products for retail, finance and telco
Looking for Senior / Staff Frontend Engineer · Tech Lead · AI‑augmented product engineer
Work mode Remote‑first across LATAM, US and EU time zones · hybrid in Bogotá possible · start in 2–4 weeks
Languages Spanish (native) · English (professional working proficiency)

02 · Stack

Core stack: React (10+ years), TypeScript (7+), Node.js (7+), Next.js (5+), design systems (5+), accessibility (5+), web performance (2+), LLM integration (since 2024). Frontend: React, Next.js, Astro, Vue, Angular, React Native, TypeScript, JavaScript, HTML5 & CSS3, Tailwind CSS, SCSS, CSS‑in‑JS. State & data: Redux, Zustand, Context API, MobX, Vuex, GraphQL (Apollo), REST APIs. Backend & data: Node.js, Express, WebSockets, PostgreSQL, MySQL, MongoDB, Supabase. AI & LLM: OpenAI & Anthropic APIs, prompt engineering, structured outputs, LLM product flows, WebMCP / MCP, AI‑assisted coding, Midjourney, DALL·E. Quality & craft: Jest, React Testing Library, Cypress, Playwright, ESLint / Prettier, WCAG 2.2, Core Web Vitals, micro‑frontends, PWA & Service Workers, OWASP Top 10. Platform & DevOps: Vercel, Firebase, AWS, Google Cloud, Azure, Docker, GitHub Actions, CI/CD, Linux. Design & tooling: Figma, design tokens, Storybook, prototyping, Jira. Earlier & adjacent: jQuery, Polymer, PHP, C/C++, embedded systems & IoT, MQTT.

Highlighted row = core stack with hands‑on years · dashed chips = earlier or adjacent work, kept for context · full detail on the resume.

03 · Always learning

251 hours of certified training in 2025 across 13 credentials — AI & prompt engineering, Node.js, modern frontend, UX with Figma and business validation with LLMs. Full list on my resume.

04 · Beyond the keyboard

🚴 Cycling · 🎵 Music · ✈️ Travel · 🎮 Gaming · 🍕 Pizza & craft beer

05 · Let's talk

Based in Bogotá (UTC‑5) · intro calls Mon–Fri, 09:00–17:00. Email or LinkedIn is fastest; I'm also on X.

Email me LinkedIn View resume

Hand‑built SVG, theme‑aware via <picture> and prefers-color-scheme · no third‑party badges, no trackers.

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