Amanda Castro
Full Stack Engineer
I am a Software Developer with expertise in backend development, Java Spring Boot, REST APIs, and microservices, specializing in cloud-based solutions and scalable architectures.
About
Amanda
Full Stack Engineer focused on backend reliability, clean architecture, and cloud-based solutions — currently building in Portugal.
Soft Skills
8 strengths
Languages
3 spoken
- PortugueseNative
- EnglishProfessional Working
- FrenchLimited Working
GitHub Activity
Last year of contributions
Professional
Experience
From customer-facing operations to teaching and marketing, and onward into backend engineering, full-stack development, and cloud-based architectures — every chapter has shaped how I build reliable, user-focused software.
And a new adventure ahead
Full Stack Developer II
tnsExperienceJanuary 2026 - Present- Building content management platforms feeding web and mobile apps, a news portal with infinite scroll, and lead-generation landing pages — all on Next.js with a strong focus on speed.
- Designed and built content management platforms feeding both web and mobile apps, owning backend and frontend layers.
- Developed a news portal with infinite scroll on Next.js, focused on perceived speed and Core Web Vitals.
- Stack predominantly Next.js, with consistent attention to load performance and rendering strategy.
- Structured and developed lead generation landing pages for the company's app launch.
- Drove 40,000 organic leads with nearly 1 minute of retention and a 30% increase in results.
- Ran A/B tests to continuously improve website performance and conversion.
- Built an automated customer support system with Jira-style ticket triage, AI-generated batch responses, and an approval flow for executing actions on external platforms — including reader activation, deactivation, and profile updates.
Full Stack Developer I
tnsExperienceApril 2025 - January 2026- Developed applications in React and TypeScript using Atomic Design architecture, collaborating with Marketing and Sales to enhance the B2B customer experience.
- Development of applications in React and TypeScript using Atomic Design architecture.
- Collaboration with the Marketing and Sales departments to enhance the B2B customer experience.
- Experience with serverless services such as AWS Lambda and Cloudflare Workers.
Full Stack Developer
CapLinkExperienceMarch 2025 - Present- Maintain RESTful and GraphQL APIs with Clean Code architecture in Node.js and TypeScript while delivering polished frontend microcomponents.
- Maintain RESTful and GraphQL APIs with Clean Code architecture in Node.js and TypeScript.
- Optimize PostgreSQL queries and maintain automated test coverage above 80% with Jest and Vitest.
- Deliver frontend microcomponents in React and document them in Storybook.
- Work with Docker containers and agile methodologies such as Scrum and Kanban.
Back End Java Junior Developer
Compass UOLExperienceJune 2024 - January 2025- Contributed to the development of an Internal Development Platform (IDP) solution, primarily using Java Spring Boot, REST APIs, microservices, Clean Code, and Hexagonal Architecture.
- Developed event-driven architectures and microservices with asynchronous processing using WebFlux, WebSocket, and RabbitMQ.
- Deployed CI/CD pipelines and configured Docker containers to run applications, utilizing Docker images for APIs.
- Implemented authorization and authentication mechanisms using OAuth 2.0, Spring Security, and JWT.
- Designed and executed comprehensive test suites (unit, integration, persistence, and system) to ensure 95% code coverage and system reliability.
- Managed database migrations with Flyway and ensured compatibility between PostgreSQL and AWS Aurora queries.
- Integrated applications with AWS services such as Cognito, Lambda, SQS, SNS, API Gateway, Parameter Store, and EC2.
- Implemented a solution to consume Jenkins build progress via multiple WebSockets, enabling real-time updates for users subscribed to specific topics with session-based JWT key pair management, asynchronous logging, and multi-threaded execution.
And a new adventure ahead
Academic Journey
From an integrated technical high school to a Bachelor's in Multiplatform Software Development and a postgraduate specialization in Big Data & AI — a continuous commitment to learning and technical depth.
- Step 01LatestMay 2025 — January 2026
Faculdade Focus
Postgraduate Lato Sensu — Business Intelligence, Big Data & Artificial Intelligence
Postgraduate specialization in Business Intelligence, Big Data, and Artificial Intelligence.
- Business Intelligence pipelines and Big Data architectures
- Applied Artificial Intelligence and data-driven decision making
- Analytical modeling for complex enterprise problems
- Step 02February 2022 — December 2024
Fatec Registro
Bachelor's Degree — Multiplatform Software Development
Registro, São Paulo, Brazil
Bachelor's degree focused on multiplatform software development — backend, frontend, mobile, databases, and software engineering.
- Software engineering, algorithms, databases, and multiplatform development
- Co-authored SOFIA — an AI-based software to assist in the early diagnosis of ASD
- Integrated post-clinical monitoring platform for rehabilitated chemical dependents
- Step 03February 2019 — December 2021
ETEC Professor André Bogas
Integrated High School + Technical Course in Business Administration
Registro, São Paulo, Brazil
Integrated high school program combined with a technical course focused on business administration fundamentals.
- Business administration fundamentals and management
- Communication, teamwork, and structured problem solving
- Early foundations for a career bridging business and technology
Certifications & Accreditations
Continuous learning across cloud platforms, backend engineering, and messaging — with AWS Certified Developer planned next.
AWS Certified Cloud Practitioner Exam Training [New]
Amazon Web Services
AWS Partner: Cloud Economics Accreditation
Amazon Web Services
AWS Partner: Sales Accreditation (Business)
Amazon Web Services
RabbitMQ: Messaging with Java, Spring Boot and Spring MVC
Udemy
The Complete Java Certification Course
Udemy
Featured Work
Full-stack products, institutional websites, and AI-driven applications spanning APIs, databases, UX, cloud integrations, and production infrastructure.
Dolphin Talk
Mobile-first web app where Brazilian students practice English pronunciation in a gamified flow. Audio is recorded via the Web Audio API, sent through a Next.js Route Handler acting as a BFF that proxies Azure Cognitive Services Pronunciation Assessment, and returned with an overall score plus word-by-word error tagging (Omission, Insertion, Mispronunciation). Includes auth with HTTP-only cookie sessions, exercise history with score review, paid plans with credit tracking and inactive states, payment history, profile, and Supabase Storage signed URLs for private media.
Catelão Automotive
Institutional website for an automotive parts distributor based in Registro-SP, serving mechanics and retailers for over a decade. Includes a responsive hero (desktop/mobile variants), about section, interactive brand carousel, dedicated 'Empresa' and 'Fornecedores' pages with a side drawer revealing products per manufacturer, paginated 'Novidades' news section with dynamic [slug] routes, and a contact form with Zod validation (formatted phone/WhatsApp, Brazilian state selector) submitting through a Next.js API route powered by Nodemailer. Floating WhatsApp button, custom Redonda typography via next/font, JSON-LD, and SEO-friendly metadata.
MultPoint Automotive
Product showcase for MultPoint, specializing in fuel injection components (injector valves, repair kits, gaskets, connectors). Catalog with advanced search and filters by product line, automaker, model, and year; per-product pages with technical specs and image galleries; hero and product-line carousels on the home; a representatives section across Brazil with interactive Google Maps; and a corporate news/blog. Categories include Magneti Marelli, Bosch, Delphi, Arla, motorcycle injectors, repair kits, gaskets, and connectors. Optimized image delivery via CDN with infinite-loop carousels powered by Embla.
One Help Informática
Product and service showcase site for One Help Informática featuring a news blog, product catalog with search bar and filters, individual product pages, and an admin interface for managing products and articles. Integrated the Google Reviews API to automatically pull in reviews rated 5 stars or higher. DNS, server, and Google Search Console fully configured for organic discoverability.
SOFIA — ASD Pre-diagnosis
Mobile application designed to assist doctors with the early diagnosis of Autism Spectrum Disorder in children. The core feature is a Convolutional Neural Network that analyzes videos of child behavior, paired with age-appropriate screening tools applied within the app. Final results combine the AI inference with the screening protocol, presented as graphics and comparisons. Backed by Spring Boot and Flask services and published as a Qualis B2 paper in 2024.
Technical
Stack
The technologies I reach for most often when building backend APIs, full-stack products, cloud-based infrastructure, and reliable delivery pipelines.
Backend & API Engineering
16 technologies
The languages, frameworks, and tools I use to build reliable APIs, microservices, and backend services.
Frontend & Product Experience
10 technologies
The stack I use to build modern, performant, and accessible interfaces for web products.
Data & Messaging
9 technologies
The storage, migration, and messaging technologies I use to keep systems consistent and event-driven.
Cloud, DevOps & Delivery
12 technologies
The cloud and delivery tooling I use to deploy, secure, and operate applications in production.
Testing, Tooling & Methodologies
9 technologies
The quality, collaboration, and productivity tools I rely on to ship with confidence.
Get in Touch
Open to full-stack, backend, and frontend engineering opportunities, as well as thoughtful collaborations and freelance projects.
Let's Build Something
If you're hiring for full-stack, backend, or cloud-oriented engineering work, I'd love to talk. I'm also open to freelance projects, thoughtful collaborations, and open-source conversations.