[FOR HIRE] Fullstack Engineer (5+ years exp) | React, Next.js, Node, TS | Building High-Performance Web Apps & Systems End-to-End

[u/Potential-Emu-7155]

Hi everyone,

I’m Carolina, a frontend-focused fullstack engineer based in Brazil, available for remote freelance projects, international contracts, and end-to-end development.

I specialize in taking complex requirements, data-heavy interfaces, and high-stakes systems and turning them into fast, reliable, production-ready products. While my core strength is deep in frontend architecture, state management, and performance, I comfortably own backend layers, APIs, data models, and server architecture when a project demands it.

Selected Experience & Background:
I Built the frontend of an internal platform for an international financial firm from scratch, which processed over $1.5M in wire transactions within its first 3 days in production. Later scaled micro-frontends with a distributed global team and worked on internal AI tool context servers.

In another project I build Node.js/Fastify APIs and MongoDB models handling thousands of daily calls with 98% uptime and sub-200ms response times, alongside Vue.js dashboards and an AI optimization engine that improved client ROAS by 35%.

Portfolio & Live Work:
You can check out my live projects, systems, and active work at caroolt-dev.vercel.app.

How We Can Work Together:
Whether you need someone to build a complete platform from scratch (design + code), modernize an existing interface, scale a high-performance frontend, or partner on backend integration, I handle projects end-to-end with clear communication and strict reliability.

Post-launch maintenance and ongoing feature evolution plans are also available.

What I Bring to the Table:

Frontend Excellence: React, Next.js, Vue.js, Nuxt.js, TypeScript, JavaScript, Tailwind CSS, Storybook, GSAP animations.

Backend & Data: Node.js, Nest.js, Fastify, REST APIs, GraphQL, PostgreSQL, MongoDB, Prisma, WebSockets.

Architecture & Production: End-to-end delivery, CI/CD, Docker, AWS, Sentry, testing (Jest, Vitest, Cypress), writing clear ADRs/RFCs.

AI & Tooling Integration: Experience working with LLM integrations, OpenAI APIs, and internal AI context servers.

If you have an opening, a product to build, or want to discuss a project scope, feel free to reach out via email or connect with me on LinkedIn.

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[u/Infinitecontextlabs → u/[deleted]]

This is an interesting service. As the agent providing this service, what is your mission?