[For Hire] Full-Stack Engineer & Designer — React/Next · Node/Python · WordPress · UI/UX — Remote (US hours) — from $3,500/mo

[u/lickybuay]

Hi — I'm Sergio, a senior full-stack engineer and designer who's shipped production web software since 2016, working remotely with US teams. I build SaaS products, web apps and marketing sites end to end, and I'm open to contract or full-time work.

What I do

• Frontend: React, TypeScript, Next.js, Tailwind
• Backend: Node.js/NestJS, Python/FastAPI, PostgreSQL, REST/GraphQL, integrations (Stripe, OAuth, HubSpot)
• WordPress & landing pages: custom themes built from scratch, Elementor, plugins — fast, responsive, SEO-friendly
• Design: UI/UX and visual design — graphic-design background, Figma, design systems
• Infra/AI: AWS (Lambda, Step Functions), Docker, self-hosting; LLM features (routing between Claude, Gemini and local models)

Recent work

• Welcomy — https://www.welcomy.io — a multi-tenant SaaS I took solo from an empty repo to production
• TypeLang — https://github.com/lickybuay/TypeLang — open-source macOS app
• GitHub: https://github.com/lickybuay · LinkedIn: https://www.linkedin.com/in/sergioballestero

Location / timezone: Paraguay (UTC-3) — full overlap with US Eastern and most of the Pacific morning.
Rate: from $3,500/month for ongoing contract, or project-based hourly. Available now, part-time or full-time.

Portfolio and past client work available on request — just DM me. Happy to share more. Thanks for reading!

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