Bolivia / Remote LATAMAvailable for remote projects

Full Stack & AI engineeringfor web products and automation

I build shipped dashboards, APIs, AI agents, RAG chatbots, and automation workflows with React, Next.js, FastAPI/NestJS, and modern AI tooling.
8 shipped systemsAI AgentsFull StackAutomation

Services

Practical builds for real product work.

I focus on things that ship: working interfaces, reliable APIs, useful AI, and test coverage for flows that matter.

Private assistants that answer from your documents, product data, or workflows.

Next.js / Vercel AI SDK / pgvector / Qdrant

Dashboards, APIs, admin panels, and MVPs with a production-ready path.

React / Next.js / FastAPI / NestJS / PostgreSQL

E2E coverage for critical flows, regression suites, and product quality checks.

Playwright / Cypress / TypeScript / CI

Fast fixes for broken UI, slow pages, hydration issues, and unstable flows.

Next.js / React / Profiling / Web vitals

Experience

Product engineering with QA judgment.

Full Stack & AI Developer with a QA Automation background, building production workflows at the intersection of web apps, AI agents, and reliable delivery.

I build web products and applied AI features at Aipraxia, combining frontend, backend, agent workflows, and automation with a strong quality baseline.

Experience

  • Aipraxia: web product development, AI integrations, voice agents, and production workflows.
  • Minka Software: QA Automation with Cypress, TypeScript, and Page Object Model.
  • Testlio Ignite IV: selected among 378 applicants, improving testing speed and coverage.

Core stack

  • Full stack: React, Next.js, TypeScript, NestJS, Python, FastAPI, REST APIs.
  • AI: MCP, RAG, LangGraph, Codex, and Vercel AI SDK.
  • Quality: Cypress, Playwright, Postman, and maintainable test architecture.

Strengths

A quick read of where I fit.

Web products

92%

Applied AI

88%

QA automation

96%

Stack

Tools for building and validating.

Technology loop

16 tools

  • Next.js
  • React
  • Python
  • FastAPI
  • QdQdrant
  • PostgreSQL
  • LaLangGraph
  • Vercel AI SDK
  • RARAG
  • LiveKit
  • NestJS
  • TypeScript
  • Prisma
  • Tailwind CSS
  • LiLiteParse
  • DrDrizzle ORM

Frontend Development

React, Next.js, Tailwind CSS, Framer Motion

Backend APIs

Node.js, NestJS, Python, FastAPI

AI Agents

LangGraph, RAG, Vercel AI SDK

QA & Testing

Cypress, Playwright, E2E Automation

Selected case studies

Systems that solve a business or operations problem.

8 projects

2025

Case 01

WhatsApp AI Agent for Bus Ticketing

WhatsApp assistant connected to a bus company backend for support, routes, RAG answers, policies, and human handoff.

Problem

Customers needed answers without waiting for a human operator.

Solution

Built an agent flow with retrieval, route context, policy handling, and escalation.

Impact

Faster support coverage with a path to real operations.

Next.jsReactPythonFastAPIQdrantPostgreSQL

2025

Case 02

Voice Assistant for Banking Collections

Low-latency voice agent for collections with auditable conversations and policy-aware responses.

Problem

Collections calls needed consistency, speed, and traceability.

Solution

Implemented a real-time voice workflow with LiveKit, FastAPI, LangGraph, and React.

Impact

Reduced manual friction and made conversations easier to audit.

PythonFastAPILiveKitLangGraphVercel AI SDKReact

2026

Case 03

DOCSAI

Authenticated RAG assistant for business documents with private PDF uploads and cited chat answers.

Problem

Teams needed to ask questions over private documents without losing source traceability.

Solution

Built document ingestion, background parsing, pgvector retrieval, auth, and cited chat.

Impact

Turns static documents into a searchable internal assistant.

Next.jsTypeScriptTailwind CSSVercel AI SDKLiteParseDrizzle ORM

Demo access

Email
demo@docs.devdraven.dev
Password
DocsAI.Demo.Free.2026!

2025

Case 04

EasyCV Studio

CV builder with form, YAML, live preview, and exports to PDF, HTML, PNG, Typst, and Markdown.

Problem

CV editing usually breaks formatting or locks users into one export format.

Solution

Created a structured editor around RenderCV with multiple views and export targets.

Impact

Makes professional CV iteration faster and less fragile.

Next.jsReactPythonFastAPI

2025

Case 05

MASIBO WAMAS

Open-source MVP for bulk WhatsApp campaigns with Excel upload and a background queue.

Problem

Bulk messaging workflows needed a safer MVP than manual spreadsheet handling.

Solution

Built upload, queueing, campaign processing, and Evolution API integration.

Impact

Creates a repeatable campaign workflow with clearer operations.

Next.jsNestJSTypeScriptPostgreSQLRedisEvolution API

More systems

Plataforma de Encuestas para Adopción de IA

React / Next.js / NestJS

ZenFinance

React / TypeScript / Tailwind CSS

DevStack

React / TypeScript / Tailwind CSS

Available for

Remote work that needs shipping discipline.

Freelance express

Remote part-time contracts

MVP development

AI automation

QA E2E

Contact

Need a web app, AI workflow, or E2E automation shipped cleanly?

Send me a short brief and I will reply with the fastest useful next step.

douglassejas@gmail.com