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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
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
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, Row-level Security (RLS)
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
Project History
Serverless Text-to-speech
https://github.com/ultimagriever/serverless-text-to-speechA 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/
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/chartsA 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-dotnetcoreA 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 (AWS)
JUNE 2018 - JUNE 2021
AWS Certified SysOps Administrator - Associate
Amazon Web Services (AWS)
FEBRUARY 2018 - FEBRUARY 2021
AWS Certified Solutions Architect - Associate
Amazon Web Services (AWS)
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, Row-level Security (RLS), 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
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