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Hi, I'm Christopher Castro—a Senior Software Engineer with over a decade of experience building reliable, scalable, and secure applications across fintech, healthcare, ecommerce, and enterprise clients. I enjoy turning complex problems into practical software solutions and leading teams to deliver impact. My work blends hands-on coding with leadership in architecture, DevOps, and quality practices, always focusing on clarity, maintainability, and measurable business value. In my day-to-day I design and ship cloud-native microservices, implement CI/CD pipelines, and mentor engineers to grow their skills. I’m passionate about building robust systems that improve operational efficiency, reduce costs, and elevate the user experience, all while staying true to a 'quality over quantity' mindset.…Hi, I'm Christopher Castro—a Senior Software Engineer with over a decade of experience building reliable, scalable, and secure applications across fintech, healthcare, ecommerce, and enterprise clients. I enjoy turning complex problems into practical software solutions and leading teams to deliver impact. My work blends hands-on coding with leadership in architecture, DevOps, and quality practices, always focusing on clarity, maintainability, and measurable business value. In my day-to-day I design and ship cloud-native microservices, implement CI/CD pipelines, and mentor engineers to grow their skills. I’m passionate about building robust systems that improve operational efficiency, reduce costs, and elevate the user experience, all while staying true to a 'quality over quantity' mindset.

Christopher Castro

Full Stack Developer, Web Developer, Front-End Developer, +2

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Hi, I'm Christopher Castro—a Senior Software Engineer with over a decade of experience building reliable, scalable, and secure applications across fintech, healthcare, ecommerce, and enterprise clients. I enjoy turning complex problems into practical software solutions and leading teams to deliver impact. My work blends hands-on coding with leadership in architecture, DevOps, and quality practices, always focusing on clarity, maintainability, and measurable business value. In my day-to-day I design and ship cloud-native microservices, implement CI/CD pipelines, and mentor engineers to grow their skills. I’m passionate about building robust systems that improve operational efficiency, reduce costs, and elevate the user experience, all while staying true to a 'quality over quantity' mindset.…Hi, I'm Christopher Castro—a Senior Software Engineer with over a decade of experience building reliable, scalable, and secure applications across fintech, healthcare, ecommerce, and enterprise clients. I enjoy turning complex problems into practical software solutions and leading teams to deliver impact. My work blends hands-on coding with leadership in architecture, DevOps, and quality practices, always focusing on clarity, maintainability, and measurable business value. In my day-to-day I design and ship cloud-native microservices, implement CI/CD pipelines, and mentor engineers to grow their skills. I’m passionate about building robust systems that improve operational efficiency, reduce costs, and elevate the user experience, all while staying true to a 'quality over quantity' mindset.

Available to hire

Hi, I’m Christopher Castro—a Senior Software Engineer with over a decade of experience building reliable, scalable, and secure applications across fintech, healthcare, ecommerce, and enterprise clients. I enjoy turning complex problems into practical software solutions and leading teams to deliver impact. My work blends hands-on coding with leadership in architecture, DevOps, and quality practices, always focusing on clarity, maintainability, and measurable business value.

In my day-to-day I design and ship cloud-native microservices, implement CI/CD pipelines, and mentor engineers to grow their skills. I’m passionate about building robust systems that improve operational efficiency, reduce costs, and elevate the user experience, all while staying true to a ‘quality over quantity’ mindset.

Skills

Experience Level

Expert

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Language

Javanese

Advanced

Work Experience

Senior Software Engineer at Oracle

April 1, 2023 - Present

Architected cloud-native integrations between Oracle Cloud Infrastructure (OCI) and third-party SaaS apps using Node.js, Express, GraphQL, and REST APIs to improve interoperability for multinational fintech and healthcare clients. Built a real-time BI dashboard with React, Next.js, Redux, TypeScript, and D3.js to visualize financial trends and empower executives to act faster. Implemented secure REST APIs with Python (FastAPI/Flask) integrated with OCI Object Storage for HIPAA-compliant data sharing. Built scalable data pipelines on Oracle Autonomous Database with Python, Pandas, and SQLAlchemy, automating multi-tenant reconciliations and reducing manual workload by 65%. Designed event-driven serverless workflows for OCI Functions and Kafka to process millions of real-time transactions with 99.99% availability and PCI DSS compliance. Led the redesign of Oracle Fusion ERP financial modules with Java, Spring Boot, and Oracle ADF, achieving faster transaction processing, improved SQL effi

Tech Lead at SDLC Corp

March 1, 2023 - September 11, 2025

Led micro-frontend architecture for a multi-tenant SaaS product using React, Next.js, TypeScript, Module Federation, and Docker, reducing release bottlenecks and shortening delivery cycles. Built an AI-powered security analytics system for a government contractor with Python, TensorFlow, and OpenCV to deliver real-time video analysis and faster incident response. Developed robust backend APIs with Python and Flask to manage complex business logic, authentication, RBAC, and real-time updates, integrated with PostgreSQL and Redis for performance. Spearheaded development of a blockchain-based NFT marketplace for a fintech startup with Solidity, Web3.js, and Hardhat. Created serverless backends for a travel booking system (AWS Lambda, API Gateway, DynamoDB) to scale during peak traffic. Enhanced progressive-web-app capabilities for a fashion eCommerce client, delivering offline support, push notifications, and caching, boosting mobile conversions. Orchestrated containerized deployments acr

Founding Software Engineer at Loop Software LLC

August 1, 2020 - September 11, 2025

Founded Loop Software LLC and delivered an Electronics Parts Catalog with PHP, Laravel, MySQL, and jQuery, indexing over 2M components with advanced filters. Built a B2B e‑commerce solution with Laravel, Stripe, and PayPal APIs, supporting $10M+ in annual aftermarket sales while maintaining PCI-DSS compliance. Optimized catalog performance with Redis caching and SQL tuning, reducing page load times from 4.2s to 1.1s. Delivered a customer support portal with Vue.js and REST APIs, integrating case management with ERP workflows and cutting resolution times by 30%. Implemented CI/CD pipelines with Jenkins and GitHub Actions, automating PHPUnit and Cypress tests and increasing deployment frequency. Developed a 3D product configurator tool with JavaScript and Node.js microservices, boosting conversion rates by 22%. Collaborated with UX to design persona-driven workflows in Figma, increasing user adoption by 38%.

FullStack Developer at Snowman Labs

February 1, 2018 - September 11, 2025

Contributed to a mobile banking and lending app using Ionic and AngularJS, integrating REST APIs with payment gateways and offline storage. Built a healthcare appointment scheduling platform with React, Node.js/Express, MongoDB, deployed on Heroku. Created real-time logistics dashboards with Socket.IO and Leaflet for fleet tracking and geofencing alerts. Integrated an AI-driven chatbot prototype with Dialogflow, reducing first-response time. Established CI/CD pipelines with Jenkins and Docker to streamline builds and deployments, and led frontend-backend integration with REST/Mongo. Participated in Agile ceremonies and mentored juniors on JavaScript, REST API design, and testing.

Software Developer Intern at Moveworks

October 1, 2015 - September 11, 2025

Developed internal admin dashboards with AngularJS, jQuery, and Bootstrap; built RESTful APIs with Node.js/Express connected to MongoDB for chatbot telemetry. Integrated Slack Real Time Messaging API via WebSockets and implemented OAuth 2.0 authentication. Created reusable UI components and migrated legacy jQuery code to AngularJS, improving modularity. Implemented WebSocket streams to relay live feedback from bot simulations to dashboards. Collaborated with data engineers to log telemetry in MongoDB for quick search and visualization. Wrote unit and integration tests with Mocha and Chai to cover key API endpoints and dashboard components.