Full-Stack Software Engineer

Ship faster with custom web apps & AI-powered tools

I help SMBs launch reliable, scalable products using React/TypeScript, FastAPI/Flask, and Spring Boot—deployed to AWS/Vercel/Railway. Book a free consult or browse services & case studies below.

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10+

Projects shipped

~2–4w

Typical delivery

EST

US-based (UTC-4)

99.9%

Uptime targets

Efrain Palencia headshot
Remote-friendly Fixed-scope options

Services

End-to-end delivery—from UX wireframes to cloud deployment—with clear communication and maintainable code.

Frontend Engineering

Responsive, accessible UIs with React, TypeScript, Vite/Next.js, Tailwind, shadcn/ui.

  • Design → dev handoff
  • Component libraries
  • Performance budgets
Get a quote

Backend & APIs

FastAPI/Flask & Spring Boot APIs, PostgreSQL, auth, caching, observability.

  • JWT/RBAC
  • Background jobs
  • Monitoring & logs
Scope my API

AI Integrations

OpenAI, RAG with Pinecone, embeddings, chatbots, voice features, automations.

  • Chatbots for SMBs
  • Semantic search
  • TTS/STT pipelines
Add AI to my app

Cloud & DevOps

AWS, Vercel, Railway, Docker, CI/CD (GitHub Actions), security & monitoring.

Harden & ship

Maintenance & Support

Retainers, bug fixes, refactors, and roadmap planning to keep you shipping.

Start a retainer

Fixed-scope Packages

Simple pricing. Clear deliverables. Great for pilots and MVPs.

Starter Website

Landing page + contact form + analytics

$1,500

  • 1–2 weeks
  • Responsive, fast, SEO-ready
  • Deployed to Vercel/Hostinger
Book Free Consult

MVP Web App

Auth, CRUD, dashboard, emails

$6,000

  • 3–5 weeks
  • React + FastAPI/Spring
  • CI/CD + monitoring
Scope My MVP

AI Add-On

Chatbot, RAG, or voice features

from $2,000

  • 1–3 weeks
  • OpenAI + Pinecone
  • Security & evals
Discuss AI Options

Have a unique scope? Email me for a custom proposal.

Selected Work

Crypto Trading Journal

FastAPI + React + PostgreSQL + JWT

Request similar

What Clients Say

“Efrain shipped our MVP on time and it’s fast. Clear communication the whole way.”
— Founder, fintech
“Great React/TypeScript skills. Thoughtful about DX and performance.”
— CTO, SaaS
“Our sales team loves the AI chatbot—replies are accurate and on-brand.”
— Ops Lead, services

See How I Work

A quick overview of my process—from scoping to deployment.

FAQs

How soon can we start?

Typically within 1–2 weeks after a quick scoping call.

Do you work fixed price or hourly?

Both. Packages above are fixed-scope; custom work can be hourly or capped.

What does your handoff include?

Docs, source code in your repo, CI/CD setup, and a short Loom walkthrough.

Book a Free 15-min Consult

Tell me about your project. I’ll reply same day.

Prefer email? efrain@efai-tech.com

Ready to start? Free Consult