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Douglas Méndez

@douglasmndez

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I build scalable backend systems, automation pipelines, and APIs with Python, NestJS, TypeScript, and AI agents.

Cuba

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What I'm looking for

I'm looking for a fully remote role where I can build scalable backend systems, APIs, automation workflows, and AI-powered solutions while collaborating with distributed, cross-cultural teams.

I've built backend systems, REST APIs, and automation workflows for HorecaRentable, QA-BIT, DOT ZERO, and Universidad de las Ciencias Informáticas.

At QA-BIT, I developed NestJS APIs and end-to-end Django and TypeScript applications, including a Telegram and WhatsApp publication platform processing thousands of daily messages through GramJS, BullMQ, Redis, and PostgreSQL.

At DOT ZERO, I developed Python/Django and NestJS microservices, built automated test suites that reduced regression incidents by 60%, and automated data processes that reduced manual work by about 70%.

I also build multi-agent AI pipelines with CrewAI and LangGraph, work across ReactJS and Angular components, and collaborate with distributed multilingual teams in English. I'm available for fully remote work.

Experience

Work history, roles, and key accomplishments

Backend Developer

HorecaRentable

Nov 2025 - Mar 2026 (4 months)

Developed backend features using Python, Django, and Django REST Framework for an e-commerce dropshipping platform. Built and maintained web scraping and automation processes with Selenium, and collaborated on frontend components with ReactJS.

Python Django Django REST Framework Selenium React Web Scraping Automation

Full Stack Developer (Backend-focused)

QA-BIT

Jul 2025 - Oct 2025 (3 months)

Developed and optimized RESTful APIs with Node.js and NestJS, and collaborated with QA teams on automated testing. Engineered an automated publication platform for Telegram and WhatsApp, and built multi-agent AI automation pipelines.

NodeJS NestJS TypeScript React Angular Django Django REST Framework GramJS BullMQ Redis PostgreSQL Crew AI LangGraph LLM APIs Automation Testing

Backend Developer & QA Automation

DOT ZERO

Mar 2021 - Feb 2025 (3 years 11 months)

Developed and maintained microservices in Python/Django and NestJS/TypeScript, integrated with PostgreSQL and Docker. Implemented automated testing suites, CI/CD pipelines, and workflow automation, reducing regression incidents by 60% and manual data tasks by ~70%.

Python Django Django REST Framework NestJS TypeScript PostgreSQL Docker Playwright Selenium Pytest CI CD Jenkins N8n S3 Minio Power BI React Agile Scrum

Backend Developer

Universidad de las Ciencias Informáticas (UCI)

Jan 2019 - Jan 2021 (2 years)

Developed Python backend modules for internal university systems, contributing to institutional software used by thousands of students and staff. Collaborated on code reviews, maintained technical documentation, and participated in full SDLC phases.

Python Backend Development Code Review Documentation SDLC