Francisco Barros

Olá!I'm Francisco.

A Software Engineer with expertise in building scalable web applications using modern technologies like React, Node.js, and AWS. Passionate about writing clean, efficient, and maintainable code. Based in Madeira, Portugal 🏝️.

Projects

markdown-to-whatsapp

Convert Markdown into WhatsApp-friendly formatting.

express-logger

Plug and play Express.js request and response middleware.

Blog posts

CDK Amazon API Gateway Local Development with Hot-Reload Support
2 minutes
AWS
Amazon API Gateway
CDK
SAM
Saving Firehose stream batches as JSON array
2 minutes
AWS
Firehose
CDK
Connecting AWS Athena to Tableau Cloud with Cognito
2 minutes
AWS
Athena
Cognito
Tableau

Experience

Software Engineer (Full Stack)

Ai Kosmo
November 2025 - present
  • Enhanced an existing Retrieval-Augmented Generation (RAG) pipeline built with Mastra and BullMQ to improve performance, scalability, and response accuracy.
  • Developed a WhatsApp chatbot integration to enable automated, real-time customer interactions.
  • Refactored and optimized the project architecture to improve code maintainability, modularity, and development efficiency.
Typescript
Next.js
Node.js
BullMQ
Mastra
Graph API

Software Engineer (Full Stack)

PaddyLabs
July 2024 - November 2025
  • Developed a full-stack CRM solution with a Node.js REST API and a Next.js frontend to manage the company’s customer support operations
  • Streamlined CI/CD pipelines with Github Actions to automate application builds and deployments to AWS.
  • Improved the existing microservices architecture for transaction ingestion from multiple payment providers, resulting in a 50% reduction in infrastructure costs.
  • Engineered a data warehouse solution with AWS Glue & AWS Athena to efficiently deliver reporting data to the Business Analytics team.
Typescript
Next.js
Node.js
Express
Github Actions
AWS
Docker

Software Engineer (Frontend)

Yacooba Labs
July 2022 - July 2024
  • Developed reusable React components with Material UI in a monorepo environment for use across multiple applications.
  • Contributed to the refactor of both staff and event producer CRM applications, implementing multiple new features to enhance functionality and maintainability.
  • Led the implementation of the booking page cart and several new features for the user-facing application, enhancing functionality and user experience.
Typescript
Next.js
Storybook
Jotai