Andrei Santos

ANDREI SANTOS Senior Full Stack Developer - - San Pablo City, Laguna, Philippines PROFILE Senior Backend Developer with over 8 years of experience building scalable, performant, and maintainable web platforms using Node.js (Express, NestJS) as the primary stack and Python (FastAPI, Flask) for supporting services and data-heavy workloads. Proven track record of delivering clean, modular architectures for RESTful and event-driven systems using microservices, message queues, and containerized deployments. Strong foundation in full-stack development with hands-on experience in React, Angular, and Next.js, enabling seamless frontend/backend integration. Skilled in MongoDB, PostgreSQL, MySQL, and Redis, with expertise in schema design, indexing, and query optimization. Experienced in writing and maintaining comprehensive test suites using Jest, Supertest, Pytest, and enforcing robust CI/CD pipelines with Docker, GitHub Actions, and cloud deployments on AWS and Azure. EXPERIENCE 09/2021 - 12/2024 Senior Full Stack Developer Cebu City Full Scale [Remote] • • • • • • • Built scalable APIs using Node.js (Express + NestJS), handling over 10M+ requests/month with 99.9% uptime. Designed and maintained microservices architecture with RabbitMQ, Redis, and gRPC, improving service decoupling and observability. Developed data processing and async jobs with Python (FastAPI + Celery), reducing batch job latency by 48%. Improved application security with OAuth2, JWT-based auth, and rate limiting, resulting in 34% fewer vulnerability reports. Created shared utility libraries and middleware packages used across teams to improve consistency and reduce dev time. Deployed services via Docker + GitHub Actions to AWS ECS/Fargate, automating blue-green deployments. Conducted architecture reviews and led a team of backend engineers in agile delivery of highimpact product features. 04/2019 - 07/2021 Full Stack Developer Cebu City Chromedia [Remote] • • • • • • • Built RESTful APIs with Node.js + Express, consumed by React apps for real-time data interactions. Designed reusable components and modules in React, using RxJS and Redux Toolkit for efficient state management. Integrated backend services with MongoDB and PostgreSQL, using Mongoose and Knex.js for ORM support. Supported backend automation tasks and reporting using Python scripts (Flask + Pandas). Set up testing pipelines using Jest for backend and Karma/Jasmine for frontend, improving deployment confidence. Used Docker Compose to run full-stack development environments, improving onboarding and reducing setup time by 60%. Collaborated with product and design teams to define APIs and build seamless user experiences across platforms. 09/2016 - 11/2018 Web Developer Cebu City KODA Kollectiv • • • • • • • www.resumementor.com Developed responsive UIs using React, Angular, and SCSS, improving cross-device performance and accessibility. Integrated RESTful APIs via Axios and Angular HttpClient, ensuring smooth UX and robust error handling. Refactored legacy components into reusable modules with React Hooks and Angular Services. Styled components using Tailwind CSS, Material-UI, and Ant Design, ensuring design consistency. Implemented client-side form validation and data visualization with Chart.js and React Hook Form. Built unit tests with React Testing Library and Jest, increasing UI test coverage by over 70%. Actively contributed in sprint planning and retrospectives, ensuring continuous improvement in team workflow. SKILLS Language C/C++, C , JavaScript (ES6+), TypeScript, Java, PHP, Python Frontend Angular, React, Next.js, Vue.js, Bootstrap, Tailwind CSS, MUI, Antd, UI/UX Backend Node, Express, Nest, Django, FastAPI, Flask, ASP.NET Core, .NET 6/7, C , Spring Boot, Laravel Databases MySQL, Oracle, PostgreSQL, MongoDB, FirebaseDB, DynamoDB, Cassandra, Cloud Platforms AWS(EC2, S3, RDS, Lambda, CloudWatch), GCP, Microsoft Azure Testing Frameworks JUnit, PyTest, Mockito, Cypress, Jest, Selenium Mobile Flutter, React Native Other Git/Github, Terraform, Jenkins, Docker, Kubernetes, WebSocket API, RESTFUL API, GraphQL, QAuth, Web API integration EDUCATION 09/2012 - 07/2016 Bachelor's in Computer Science Quezon City Ateneo de Manila University • • LANGUAGES English Native Web Development Software Engineering Basic Programming Language Java/JavaScript/ TypeScript