Isaias F Santos - Resume

Full Stack Developer

Summary

    Senior Full Stack Developer with over 10 years of experience designing and building scalable microservices and modern web applications.

    • Frontend: Proficient in React, Next.js, GraphQL, Micro Frontends, Jest, and React Testing Library.
    • Backend: Strong experience with Node.js, Apollo Server, Docker, Docker Compose, and Kubernetes.
    • Integrations: Extensive work with platforms like Commercetools, Algolia, DoorDash, Contentful, Braintree, Stripe, and Sentry. Cloud & DevOps: Hands-on with AWS, GCP, and Azure—leveraging services such as Lambda, SQS, RDS, DynamoDB, CloudWatch, and EventBridge for distributed, event-driven architectures.

    Professional Experience

    Here is my work Experience

    Happy Biz

    Frontend Developer

    Nov 2017 - May 2020

    • React
    • TypeScript
    • Node.js
    • AWS

    Work with focus on creating mobile and web applications using React, Javascript ,Typescript, React Native and AWS. I was responsible for creating and implementing all UI/UX for web and mobile applications .

    Everest Systems

    Senior Software Development Engineer

    Nov 2022 - May 2025

    • Node
    • TypeScript
    • React
    • AWS
    • Git
    • GraphQL
    • NX

    I was responsible for designing and developing complex business rules to ensure the system was both highly customizable and user-friendly from the end user's perspective.

    I led development initiatives across serverless and cloud-native environments, utilizing AWS services such as Lambda Functions, SQS, EventBridge, Cognito, and RDS to build scalable and resilient systems. On the frontend, I used React, Redux, and React Context for effective state management, with a strong focus on performance and maintainability.

    One of my key contributions was in the architecture and implementation of a new ERP system for a multinational technology startup. This involved: Designing and developing reusable components using React, Node.js, PostgreSQL, and TypeScript. Defining system usage patterns and architectural standards. Leading engineering initiatives focused on scalability and performance.

    Object Edge

    Full-stack Developer

    March 2020 - April 2021

    • Commercetools
    • Microservices
    • Contentful
    • Next.js
    • Storybook
    • Jest
    • Stripe
    • Braintree

    Technologies: Contentful, Commercetools, GraphQL, Jest, Node.js, Storybook, React, Next.js, Gatsby, GCP.

    Project: Nuts.com Led the implementation and ongoing support of a subscription program, increasing customer retention and driving a 12% boost in recurring revenue. Supported the team’s migration from PHP to a modern stack (Vue.js and Node.js), resulting in improved performance and a more seamless user experience. Implemented MACH architecture with Vue.js, TypeScript, GraphQL, AWS, and Node.js to enhance agility and scalability. Optimized site performance to improve conversion rates and support business growth. Built backend solutions using AWS Lambda and EventBridge to automate notifications and transactional emails, streamlining operations and improving customer communication. Contributed to the architecture of a modern e-commerce platform based on Microservices, APIs, Cloud-native SaaS, and Headless commerce principles.

    Project: Zenni Optical Commercetools, and Contentful for a scalable, flexible solution. Led the development of core backend microservices (Cart, Login, Order History) integrating data from Contentful and Commercetools. Designed and implemented the complex eyeglass configuration engine, enhancing product customization for users. Worked across front-end and back-end components of the Cart and Checkout flows, directly improving user experience and increasing conversion. Helped maintain a robust MACH-based e-commerce platform tailored to Zenni’s evolving business needs.

    Valtech

    Software Engineer

    Nov 2021 - May 2022

    • NextJS
    • commercetools
    • GraphQL
    • Jest
    • NX
    • Node
    • NestJS

    In Valtech I have been working with contentful, commercetools, GraphQL, Jest, Node.js, Ionic, React, Next.js, Gastby and GCP.

    Senior Full Stack Engineer

    Client: PetSmart Technologies: Nx (Monorepo), Next.js, TypeScript, GraphQL, Node.js, GCP and GKE Led development of a monorepo-based architecture using Nx, supporting multiple micro-frontends with Next.js and backend APIs running in GKE clusters. Implemented a MACH-compliant architecture with scalable microservices, modern API layers, and cloud-native deployments. Contributed to the design and implementation of a modular, modern e-commerce platform leveraging Microservices, APIs, Cloud-native services, and Headless commerce principles.

    Senior Full Stack Engineer – ISC2

    Client: ISC2 Technologies: GraphQL, Azure (Serverless), Node.js, TypeScript, Algolia, Salesforce and Commercetools Architected and developed a new backend system from scratch using GraphQL, applying a microservices-based approach to improve scalability and maintainability. Designed the overall system architecture and documentation, onboarding and mentoring ISC2’s internal developers on the new structure and best practices.

    Built fully serverless services on Azure, integrating with various third-party platforms including Algolia, Salesforce, and Commercetools to deliver a seamless and robust solution.

    Happy Biz

    Frontend Developer

    Nov 2017 - May 2020

    • React
    • TypeScript
    • Node.js
    • AWS

    Work with focus on creating mobile and web applications using React, Javascript ,Typescript, React Native and AWS. I was responsible for creating and implementing all UI/UX for web and mobile applications .