Pamela is available for hire

Pamela Argentino de Oliveira Alves

Verified Expert in Engineering

Full-stack and AWS Developer

São Paulo - State of São Paulo, Brazil

Toptal member since March 30, 2017

Expertise

Web Development Full-stack Front End Back-end Developers Serverless AWS IAM AWS JavaScript REST API Express.js Ruby React.js Node.js

Bio

With more than 12 years of professional experience in software development and architecture, Pamela has delivered projects to major banks, financial institutions, insurance companies, retailers, and healthcare institutions, among other industry verticals. These projects include—but are not limited to—designing scalable, cost-effective, and highly available applications for public cloud environments.

Portfolio

Toptal

TypeScript, JavaScript, React, SQL, PostgreSQL, Tailwind CSS, Cypress...

Inkitt Inc

Ruby on Rails (RoR), React, Search Engine Optimization (SEO), Full-stack...

Vanilla

React, TypeScript, GraphQL, Front-end, HTTP, Kubernetes, Fintech...

Experience

React - 8 years
TypeScript - 6 years
Docker - 3 years
AI Integration - 2 years
Shadcn UI - 2 years
Claude Code - 2 years
Anthropic - 2 years
Next.js - 1 year

Preferred Environment

MacOS, RubyMine, PhpStorm, WebStorm

The most amazing...

...thing I've coded is a server that generates countdown GIFs.

Work Experience

Senior Software Engineer

2025 - 2026

Toptal

Helped refactor a codebase written in a no-code platform into a production-ready, AI-powered product.
Tracked and fixed bugs and implemented features using Jira.
Implemented entirely new features and processes in addition to those refactored, bringing more value to the product.
Implemented unit testing across the codebase, improving code quality and reducing regressions.

Technologies: TypeScript, JavaScript, React, SQL, PostgreSQL, Tailwind CSS, Cypress, OpenAI API, Vite, Edge AI, Claude, Supabase, Deno, Radix UI, Stripe, AI Integration, AI Tools, Claude Code, Full-stack Development, Shadcn UI

Full-stack Engineer

2025 - 2025

Inkitt Inc

Enhanced SEO features for stories, pre-loading tags for selection in new stories, and advanced search.
Fixed bugs and delivered features using Linear as a reporting tool.
Participated in product meetings, offered insight into pitfalls and drawbacks, and suggested potential solutions for new features.

Technologies: Ruby on Rails (RoR), React, Search Engine Optimization (SEO), Full-stack, SEO Tools, JavaScript, TypeScript, PostgreSQL, Web Development, Artificial Intelligence (AI), User Experience (UX), HTML, API Development, Containerization, React Query, Shadcn, Authentication, Web Accessibility, Large Language Models (LLMs), Zustand, AI-generated Code, Claude, Web Applications, Supabase, AI Integration, AI Tools, Anthropic, Claude Code, Full-stack Development, Vercel, Shadcn UI

Senior Software Developer

2024 - 2025

Vanilla

Developed new scenario views for the Legacy Planning feature, helping estate advisors project how much growth and tax savings their clients can obtain with proper planning.
Oversaw code reviews and peer programming sessions, helping colleagues get unblocked and accelerating releases while maintaining the highest quality.
Increased test coverage for existing features, improving quality, and reducing bugs on release.

Technologies: React, TypeScript, GraphQL, Front-end, HTTP, Kubernetes, Fintech, Team Leadership, OAuth, REST APIs, Vite, OAuth 2, Redis, Tailwind CSS, Artificial Intelligence (AI), Apollo, React Apollo, GraphQL API, Infrastructure as Code (IaC), User Experience (UX), Amazon Cognito, HTML, API Development, Containerization, Authentication, DevOps, Scalability, Web Accessibility, Large Language Models (LLMs), Next.js, Performance Optimization, Web Development, AI-generated Code, Data Pipelines, Web Applications, Amazon Redshift, AI Integration, AI Tools, Anthropic, Claude Code, Full-stack Development

Ruby on Rails Developer

2020 - 2023

Spin (Tier Mobility)

Implemented partial refunds to individual trips, curbing a loss of revenue of up to $2 million a year.
Documented new features, processes, and technical designs in Confluence.
Managed the field testing of certain features that did not allow regular testing with simulated vehicles.

Technologies: Ruby, Ruby on Rails (RoR), Stripe, Braintree API, Stripe API, PayPal API, BrainTree, PayPal, Back-end, CI/CD Pipelines, Full-stack, Architecture, Software Design, Technical Leadership, Test-driven Development (TDD), Code Review, API Integration, Ruby on Rails API, Stripe Payments, AWS IoT, Cloud Firestore, HTTP, Google Cloud Platform (GCP), eCommerce, Kubernetes, React Native, Team Leadership, Mobile Development, REST APIs, OAuth 2, Redis, Software Architecture, App Store, Infrastructure as Code (IaC), AWS Secrets Manager, AWS ECS Fargate, Amazon CloudFront, API Development, Containerization, Authentication, DevOps, Scalability, Performance Optimization, Web Development, Data Pipelines, Twilio API, Web Applications, Amazon Redshift, Cybersecurity, Full-stack Development, System Architecture

Back-end Developer (via Toptal)

2020 - 2020

Rappi Engineering

Developed new features that enabled the implementation of complex discount logic to product packs.
Covered all new and fixed code with unit and integration tests, enabling up to 97% reported coverage.
Delivered all assigned tasks on time, leading to two consecutive successful sprints.

Technologies: Chai, Mocha, Node.js, JavaScript, ESLint, MySQL, PostgreSQL, Apache Kafka, Sinon.JS, APIs, Microservices Architecture, Back-end, API Integration, HTTP, Express.js, REST APIs, Amazon EC2, API Development, Containerization, Authentication, Web Development, Data Pipelines, Web Applications, Full-stack Development

Full-stack Developer (via Toptal)

2019 - 2019

Catch New York

Implemented Redux with local storage persistence to save the user's location preferences.
Created UI extensions on Contentful to manage location-specific information.
Created Contentful environments and migrations to replicate content types across environments.

Technologies: Node.js, JavaScript, GraphQL, Styled-components, Contentful, React, APIs, Back-end, Mobile-first Design, Full-stack, TypeScript, Front-end, HTTP, User Experience (UX), HTML, Web Accessibility, Web Development, Web Applications, Full-stack Development

Full-stack Developer (via Toptal)

2019 - 2019

Last Rev LLC

Added Sentry monitoring to the back end and the front end.
Created a standalone app that manages delivery scheduling with React, Firebase authentication, hosting, and cloud functions.
Created new Handlebars helpers with unit tests for front-end components.
Created automated Contentful migrations with Node.js.

Technologies: Node.js, JavaScript, Firebase, Sentry, Jest, React, Bootstrap, jQuery, Handlebars, APIs, Back-end, Mobile-first Design, Full-stack, Test-driven Development (TDD), API Integration, TypeScript, Front-end, HTTP, Express.js, HTML, Contentful, API Development, Containerization, Web Accessibility, Web Development, Web Applications, Full-stack Development

AWS Developer (via Toptal)

2019 - 2019

Litify

Created an interface that allows secure and encrypted file uploads.
Added auto-scaled routines to automatically convert files whenever applicable using LibreOffice Headless, GhostScript, and ImageMagick.
Created an API with an added authorization layer that validates an access token against the client's user base.
Drafted API documentation and solution architecture diagrams.
Managed the cloud infrastructure and automation processes in AWS.

Technologies: Node.js, AWS Lambda, JavaScript, Amazon Web Services (AWS), Docker, Microservices, APIs, Microservices Architecture, Serverless, Back-end, AWS Fargate, Architecture, Software Design, Test-driven Development (TDD), API Integration, TypeScript, AWS IoT, HTTP, Minimum Viable Product (MVP), REST APIs, API Gateways, AWS IAM, AWS Serverless Application Model (SAM), Redis, Amazon Elastic Container Service (ECS), Infrastructure as Code (IaC), AWS Secrets Manager, AWS ECS Fargate, Amazon CloudFront, AWS Auto Scaling, API Development, Containerization, DevOps, Web Development, Web Applications, Full-stack Development

Solutions Architect

2017 - 2019

Cognizant Technology Solutions

Designed, architected, budgeted, implemented, and managed the underlying infrastructure for a public cloud-based open banking API on Amazon Web Services.
Assembled the presentation layer for a healthcare customer support app.
Refactored the AAA model on a custom CRM platform for a large retail bank.
Assisted in estimating project effort, deadlines, and gross architecture for RFPs alongside potential clients.
Deployed a company site following the serverless architecture model.

Technologies: Ruby, Karma, Mocha, Node.js, AWS Lambda, JavaScript, React, Linux, Docker, Microservices, PHP, Ruby on Rails (RoR), .NET Core, Python, Leadership, APIs, Amazon Web Services (AWS), Microservices Architecture, Serverless, Back-end, AWS Fargate, CI/CD Pipelines, Mobile-first Design, Full-stack, Architecture, Software Design, Technical Leadership, Test-driven Development (TDD), API Integration, AWS IoT, Cloud Firestore, Front-end, HTTP, Material UI, Expo, Computer Vision, React Native, Minimum Viable Product (MVP), Team Leadership, Mobile Development, Express.js, OAuth, REST APIs, API Gateways, AWS IAM, AWS Serverless Application Model (SAM), Amazon EC2, OAuth 2, Redis, Software Architecture, Amazon Elastic Container Service (ECS), Infrastructure as Code (IaC), User Experience (UX), AWS Secrets Manager, Amazon Cognito, HTML, AWS ECS Fargate, Amazon CloudFront, AWS Auto Scaling, API Development, Containerization, Authentication, MongoDB, DevOps, Scalability, Web Accessibility, Performance Optimization, Web Development, FastAPI, Data Pipelines, Twilio API, Web Applications, Amazon Redshift, Cybersecurity, Full-stack Development, System Architecture

Full-stack Developer

2016 - 2017

JP7 | Evolving Software

Created a scalable, highly available API for serving animated countdown GIFs that are used by the largest retail group in Brazil and is accessed by millions of people on a daily basis.
Wrote unit and functional tests for most of the existing and maintained applications and applied continuous integration.
Contributed to the development of React Native apps for the music and video streaming industry.
Provided tech support and participated in meetings with one of the company's largest clients.
Built a content management system that's fully written in JavaScript for a car dealership group.

Technologies: Ruby, Karma, Chai, Mocha, Node.js, AWS Lambda, JavaScript, Microservices, Laravel, PHP, Ruby on Rails (RoR), AngularJS, React, Python, APIs, Amazon Web Services (AWS), Serverless, Back-end, Mobile-first Design, Full-stack, Test-driven Development (TDD), API Integration, Ruby on Rails API, AWS IoT, Front-end, HTTP, Material UI, Vue, Expo, React Native, Minimum Viable Product (MVP), Mobile Development, Express.js, OAuth, REST APIs, API Gateways, AWS IAM, Amazon EC2, Redis, Web Scraping, Apollo, React Apollo, GraphQL API, User Experience (UX), HTML, Amazon CloudFront, AWS Auto Scaling, API Development, Authentication, MongoDB, Scalability, Web Accessibility, Performance Optimization, Web Development, Web Applications, Full-stack Development, System Architecture

Development Lead

2015 - 2015

Shapeness

Migrated a COBOL-based ERP system that catered to car dealerships to PHP—eliminating the need for command line interfaces and constant need of SSH to access the system.
Led the migration team—planned and distributed tasks which resulted in a greater throughput than expected.
Created frameworks to adapt to the situation of a PHP system needing to consume a COBOL API and make the job easier for the team, therefore increasing throughput.
Instantiated development processes and procedures based on the Scrum Guide with 1 week long sprints and daily and weekly meetings.
Reported on a weekly basis to the immediate superior on task statuses, difficulties, and next week's planning.

Technologies: HTML, CSS, COBOL, PHP, Leadership, Back-end, Full-stack, Front-end, HTTP, Web Development, Web Applications, Full-stack Development

Development Intern

2013 - 2015

Lanetworks

Maintained an ERP system for an industrial design company.
Created a task manager in PHP and manually set up a worker to do such tasks, without the help of a framework (e.g., Laravel).
Maintained Amazon EC2 and RDS instances used to host the ERP.
Provided customer support through email, phone, and on-site training.
Exercised both regular commuting and telecommuting at times.

Technologies: CSS, PHP, Amazon Web Services (AWS), Back-end, Full-stack, AWS IoT, Front-end, HTTP, AWS IAM, Amazon EC2, HTML, Authentication, Web Development, Web Applications, Full-stack Development

Experience

Serverless Text-to-speech

https://github.com/ultimagriever/serverless-text-to-speech

A serverless app that converts text into lifelike speech by leveraging AWS services such as Lambda (back-end), API Gateway (routing), DynamoDB (persistence), SNS (pub/sub), Polly (text-to-speech) and S3 (static website hosting, audio file storage).

A link to a working example can be found below.
• http://serverlessttswebsite.s3-website-us-east-1.amazonaws.com/

Helm Monochart

https://github.com/ultimagriever/charts

A highly customizable Helm chart designed for any kind of Kubernetes deployment. The repo also leverages GitHub Actions to host the chart in GitHub Pages. The latest version supports External Secrets Operator, Image Pull Secrets, and Pod Disruption Budgets, in addition to the basic Deployment elements.

Serverless Text-to-speech .NET Core Version

https://github.com/ultimagriever/serverless-text-to-speech-dotnetcore

A serverless text-to-speech solution with Lambdas written in .NET Core, implemented with DynamoDB Context, DynamoDB Streams, and provisions a CDN for the audio files.

Education

2016 - 2019

Bachelor's Degree in Information Systems

University of Sao Paulo | USP - Sao Paulo, Brazil

2011 - 2014

Bachelor of Technology in Database Technology

Fatec | Technological College of Sao Paulo - Sao Jose dos Campos, Sao Paulo, Brazil

2009 - 2010

Technical Degree in Web Systems

IFSP | Federal Institute of Science, Education and Technology of Sao Paulo - Caraguatatuba, Sao Paulo, Brazil

Certifications

MARCH 2019 - MARCH 2022

AWS Certified Developer - Associate

Amazon Web Services

JUNE 2018 - JUNE 2021

AWS Certified SysOps Administrator - Associate

Amazon Web Services

FEBRUARY 2018 - FEBRUARY 2021

AWS Certified Solutions Architect - Associate

Amazon Web Services

Skills

Libraries/APIs

React Redux, React, Node.js, REST APIs, API Development, Chai, Ruby on Rails API, GraphQL API, Handlebars, jQuery, Sinon.JS, Stripe, Braintree API, Stripe API, PayPal API, Vue, React Query, Twilio API, OpenAI API

Tools

AWS CloudFormation, AWS Command Line Interface (CLI), Amazon CloudFront CDN, AWS IAM, Shadcn UI, Mocha, PhpStorm, NGINX, GitHub, Git, AWS AppSync, Amazon Polly, React Apollo, Amazon Cognito, Amazon CloudFront, Claude Code, WebStorm, RubyMine, Sentry, Karma, Amazon Lex, AWS Fargate, Helm, GitHub Pages, Expo, Amazon Elastic Container Service (ECS), Shadcn, Claude

Languages

Ruby, HTML, ECMAScript (ES6), JavaScript, TypeScript, ES7, GraphQL, CSS, SQL, PHP, COBOL, PHP 7, Python

Frameworks

Ruby on Rails (RoR), Laravel, React Native, Express.js, Next.js, Laravel 5, AngularJS, Redux, AWS Serverless Application Model (SAM), Tailwind CSS, Angular, Bootstrap, Jest, .NET Core, Codeception, Material UI, OAuth 2, Cypress

Paradigms

Test-driven Development (TDD), Microservices, Serverless Architecture, Pair Programming, Scrum, Microservices Architecture, DevOps, Continuous Delivery (CD), Continuous Integration (CI), Search Engine Optimization (SEO), Mobile Development

Platforms

AWS Lambda, Amazon Web Services (AWS), AWS IoT, Amazon EC2, Docker, Contentful, Firebase, MacOS, Linux, Apache Kafka, Google Cloud Platform (GCP), Kubernetes, Vercel

Storage

Amazon DynamoDB, Amazon S3 (AWS S3), PostgreSQL, MySQL, MongoDB, Redis, SQL Server 2012, Cloud Firestore, Elasticsearch, Data Pipelines

Industry Expertise

Cybersecurity

Other

APIs, Serverless, Back-end, Mobile-first Design, Full-stack, API Integration, Front-end, HTTP, Web Development, Scalability, Web Applications, Full-stack Development, Amazon API Gateway, Amazon Route 53, Leadership, CI/CD Pipelines, Architecture, Software Design, Technical Leadership, Code Review, Stripe Payments, eCommerce, Minimum Viable Product (MVP), Team Leadership, API Gateways, Software Architecture, Artificial Intelligence (AI), User Experience (UX), AWS Secrets Manager, Containerization, Authentication, Web Accessibility, Performance Optimization, Supabase, AI Integration, AI Tools, System Architecture, Styled-components, ESLint, BrainTree, PayPal, Fintech, SEO Tools, GitHub Actions, Computer Vision, OAuth, Vite, Web Scraping, App Store, Apollo, Infrastructure as Code (IaC), AWS ECS Fargate, AWS Auto Scaling, Large Language Models (LLMs), Zustand, AI-generated Code, FastAPI, Edge AI, Deno, Radix UI, Amazon Redshift, Anthropic

Collaboration That Works

How to Work with Toptal

Toptal matches you directly with global industry experts from our network in hours—not weeks or months.

Share your needs

Discuss your requirements and refine your scope in a call with a Toptal domain expert.

Choose your talent

Get a short list of expertly matched talent within 24 hours to review, interview, and choose from.

Start your risk-free talent trial

Work with your chosen talent on a trial basis for up to two weeks. Pay only if you decide to hire them.

Top talent is in high demand.

Start hiring