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Sergio – AWS, React, Typescript, experts in Lemon.io

Sergio

From Brazil (UTC-3)flag

Full-stack Web Developer|Middle-to-senior

Sergio – AWS, React, Typescript

Sergio is a Full-Stack Developer with 5+ years of experience building applications using React, Node.js, Next.js, TypeScript, and AWS. Experienced in microservices, serverless, event-driven, stateless, and distributed systems, with strong knowledge of caching strategies and scalable architectures. Skilled in Node.js internals, asynchronous code, and file/stream processing, with hands-on experience in AWS services and CI/CD pipelines. Beyond coding, he has experience as a Tech Lead, managing international teams of 10–12 people.

14 years of commercial experience in
E-commerce
Entertainment
Pet care
Retail
Social media
Veterinary services
Video production
Marketplace
Content management
Main technologies
AWS
4 years
React
6 years
Typescript
4 years
Node.js
5.5 years
Next.js
3.5 years
Additional skills
React Native
REST API
Supabase
Redis
PostgreSQL
MongoDB
Sequelize ORM
Docker
Feathers.js
AWS Lambda
Cloudflare
Nest.js
Prisma
Microsoft Azure
Azure DevOps
Neo4j
Direct hire
Possible
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Experience Highlights

Senior Full-Stack Developer
Nov 2023 - Nov 20241 year
Project Overview

Bitwerx provides a platform that simplifies data integration in the veterinary field. I contributed to building an internal tool that allowed cross-functional teams to create taxonomy mappings, enabling customers to integrate their data seamlessly.

Responsibilities:
  • Contributed to the creation of reusable components with a system design that could be applied across different applications;
  • Introduced new tools, such as Prisma, to interact with the database;
  • Improved data fetching by adding pagination, which was previously missing;
  • Enhanced text search by requiring a minimum number of characters and implementing a debounce to prevent unnecessary requests;
  • Leveraged a robust architecture with Neo4j for flexible data retrieval, efficient data combination, and Prisma for transaction management on a PostgreSQL database within a Next.js application.
Project Tech stack:
React
Next.js
Node.js
Prisma
PostgreSQL
Neo4j
Typescript
Docker
Azure DevOps
Microsoft Azure
Senior Full-Stack Developer
May 2023 - Oct 20235 months
Project Overview

Film Funder is a marketplace designed to connect creators and writers with directors and funders to develop projects in the film industry.

Responsibilities:
  • Designed the database structure for the MVP;
  • Created a REST API with basic CRUD operations for project management;
  • Implemented Prisma for database interaction;
  • Added role-based access control for the application and its features;
  • Made minor UI adjustments.
Project Tech stack:
Typescript
React
Next.js
Node.js
Nest.js
Prisma
AWS Lambda
PostgreSQL
MongoDB
Senior/Tech Lead Full-Stack Developer
Jan 2021 - May 20232 years 3 months
Project Overview

Petco.com is the largest e-commerce pet retailer in the US, with over a million visits per day.

Responsibilities:
  • Helped migrate the platform to a headless architecture;
  • Implemented SSR strategies to maximize SEO ranking;
  • Designed and executed A/B testing strategies;
  • Implemented caching strategies to improve platform performance;
  • Led a front-end development team of 12 developers across multiple countries.
Project Tech stack:
React
Next.js
AWS Lambda
Redis
Cloudflare
Senior Full-stack developer
Feb 2020 - Dec 202010 months
Project Overview

Seeconds is a mobile application that allows users to watch the latest news and trends in video format. It also enables them to follow channels, artists, or hashtags, and to like content.

Responsibilities:
  • Designed the database structure;
  • Developed the CMS backend for content creation;
  • Built a microservice for video processing using FFMPEG, Redis, and AWS S3;
  • Contributed to the development of the mobile application;
  • Created a Single Page Application (SPA) for users who received shared content links but did not have the mobile app installed;
  • Configured deep links in the mobile app to improve user experience;
  • Containerized applications with Docker to ensure consistent deployment.
Project Tech stack:
Typescript
React
React Native
Node.js
Feathers.js
PostgreSQL
Sequelize ORM
Redis
AWS
Docker

Education

2013
Telecom Engineering
Engineer

Languages

Spanish
Advanced
Portuguese
Advanced
English
Advanced

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