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I'm a Senior Full Stack Engineer with a decade of experience designing, building, and securing scalable multi-tenant SaaS platforms across healthcare, fintech, and cloud-native environments. I focus on backend hardening, secure payment integrations (Stripe Connect), and data isolation using PostgreSQL row-level security, while partnering with product and security teams to meet privacy and regulatory standards. On the frontend, I optimize React and Supabase-based interfaces for performance and user experience, guiding products from demo to production and delivering maintainable, high-quality software. I value clean architecture, thorough documentation, and proactive code reviews. I enjoy collaborating with leadership and cross-functional teams to translate complex requirements into robust solutions that scale with business needs.…I'm a Senior Full Stack Engineer with a decade of experience designing, building, and securing scalable multi-tenant SaaS platforms across healthcare, fintech, and cloud-native environments. I focus on backend hardening, secure payment integrations (Stripe Connect), and data isolation using PostgreSQL row-level security, while partnering with product and security teams to meet privacy and regulatory standards. On the frontend, I optimize React and Supabase-based interfaces for performance and user experience, guiding products from demo to production and delivering maintainable, high-quality software. I value clean architecture, thorough documentation, and proactive code reviews. I enjoy collaborating with leadership and cross-functional teams to translate complex requirements into robust solutions that scale with business needs.

Juan De La Cruz

Full Stack Developer, Web Developer, App Developer, +4

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I'm a Senior Full Stack Engineer with a decade of experience designing, building, and securing scalable multi-tenant SaaS platforms across healthcare, fintech, and cloud-native environments. I focus on backend hardening, secure payment integrations (Stripe Connect), and data isolation using PostgreSQL row-level security, while partnering with product and security teams to meet privacy and regulatory standards. On the frontend, I optimize React and Supabase-based interfaces for performance and user experience, guiding products from demo to production and delivering maintainable, high-quality software. I value clean architecture, thorough documentation, and proactive code reviews. I enjoy collaborating with leadership and cross-functional teams to translate complex requirements into robust solutions that scale with business needs.…I'm a Senior Full Stack Engineer with a decade of experience designing, building, and securing scalable multi-tenant SaaS platforms across healthcare, fintech, and cloud-native environments. I focus on backend hardening, secure payment integrations (Stripe Connect), and data isolation using PostgreSQL row-level security, while partnering with product and security teams to meet privacy and regulatory standards. On the frontend, I optimize React and Supabase-based interfaces for performance and user experience, guiding products from demo to production and delivering maintainable, high-quality software. I value clean architecture, thorough documentation, and proactive code reviews. I enjoy collaborating with leadership and cross-functional teams to translate complex requirements into robust solutions that scale with business needs.

Available to hire

I’m a Senior Full Stack Engineer with a decade of experience designing, building, and securing scalable multi-tenant SaaS platforms across healthcare, fintech, and cloud-native environments. I focus on backend hardening, secure payment integrations (Stripe Connect), and data isolation using PostgreSQL row-level security, while partnering with product and security teams to meet privacy and regulatory standards. On the frontend, I optimize React and Supabase-based interfaces for performance and user experience, guiding products from demo to production and delivering maintainable, high-quality software.

I value clean architecture, thorough documentation, and proactive code reviews. I enjoy collaborating with leadership and cross-functional teams to translate complex requirements into robust solutions that scale with business needs.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Language

English

Fluent

Spanish; Castilian

Fluent

Work Experience

Senior Full Stack Engineer at UnitedHealthcare

April 1, 2025 - August 4, 2025

Developed modular Express.js APIs for chatbot message routing, context management, and backend healthcare system integration. Built dynamic Next.js frontends for conversational UI components and integrated chatbot experiences within existing workflows. Collaborated with product and AI platform teams to define chatbot architecture, security, and data flow requirements. Focused on creating robust, scalable API layers and highly responsive accessible UI components for clinical and operational users.

Full Stack Engineer at Google

August 1, 2023 - August 4, 2025

Developed Next.js frontend components supporting enterprise data processing applications for Google Cloud Industry Solutions. Built secure Nest.js APIs to handle large-scale data ingestion and transformation pipelines. Designed reusable UI patterns and component libraries to standardize customer-facing product experiences. Contributed to architecture and scalability improvements for cloud-based AI-driven document processing products. Collaborated with engineering, product, and AI/ML teams integrating intelligent features into data workflows.

Full Stack Developer at LawnStarter

November 1, 2021 - August 4, 2025

Architected core backend services for the home services platform using Express and GraphQL. Built React frontends for booking, provider management, dispatch operations, and customer portals. Refactored key services into a microservices architecture running on AWS. Implemented event-driven systems with AWS SNS/SQS to support asynchronous processing and interservice communication. Enhanced frontend performance and maintainability through component optimization and state management improvements.

Full Stack Developer at Support.com

November 1, 2019 - August 4, 2025

Developed React-based user interfaces and component libraries for the remote tech support platform. Built and maintained Node.js REST APIs to support real-time chat, diagnostic tools, and session workflows. Contributed to migration of legacy services to Kubernetes microservices architecture. Implemented WebSocket-based real-time communication layers for live support interactions. Automated CI/CD pipelines and infrastructure deployments across multiple production environments.

Fullstack Developer at Fry’s Electronics

August 1, 2017 - August 4, 2025

Built and deployed full-stack applications using Node.js and React, delivering seamless user experiences for financial dashboards. Enhanced legacy Node.js codebases improving maintainability and reducing error rates. Collaborated with DevOps teams to containerize applications using Docker for faster deployment. Automated deployment pipelines with Jenkins, ensuring quicker and more reliable releases.

Senior Full Stack Engineer - SaaS Platforms at UnitedHealthCare

November 1, 2023 - April 1, 2026

Led backend security enhancements using PostgreSQL row-level security to enforce strict data isolation across multi-tenant healthcare portals. Implemented HIPAA-aligned secure payment workflows and subscription billing features akin to Stripe Connect. Audited and refactored legacy ASP.NET Core backends to improve maintainability and scalability. Collaborated with product owners and security teams to ensure compliance with healthcare privacy standards. Built React components for patient record management and designed secure, scalable RESTful APIs.

Full Stack Engineer - Cloud SaaS Solutions at Google

November 1, 2021 - November 1, 2023

Developed scalable ASP.NET Core microservices on Kubernetes for cloud-native SaaS platforms. Enhanced React dashboards with Redux for data visualization and operational monitoring. Conducted performance audits and codebase refactoring to optimize resources and responsiveness. Worked on multi-tenant data isolation with PostgreSQL; integrated secure payment flows and fee management. Authored architectural documentation and deployment guides; collaborated with security/compliance to align with GDPR and data privacy standards.

Full Stack Developer - SaaS Booking & Payment Systems at LawnStarter

January 1, 2020 - November 1, 2021

Designed multi-tenant SaaS booking management using ASP.NET MVC and Web API. Integrated Stripe Connect for subscription billing, transaction management, and refunds. Developed responsive front-end features with Angular for self-service booking workflows. Architected backend services with a focus on data privacy and secure access controls; implemented PostgreSQL schemas with row-level security. Guided MVP-to-production transition; conducted code reviews and optimization; ensured PCI DSS compliance and produced technical documentation and training materials.

Full Stack Developer - Payment Integration & SaaS Features at Support.com

October 1, 2017 - November 1, 2019

Developed secure payment gateway integrations enabling subscription billing and transaction management. Built React-based product search and server-side rendering to optimize SEO and user experience. Implemented ASP.NET MVC and Entity Framework-based APIs to support inventory and sales analytics. Applied backend security and data privacy best practices; collaborated with cross-functional teams to align features with compliance goals. Enhanced reporting with SSRS and performed security audits to reduce vulnerabilities; documented maintenance procedures.

Full Stack Developer - Inventory and Payment Systems at Fry's Electronics

May 1, 2015 - August 1, 2017

Developed inventory management and payment processing systems using ASP.NET MVC, Entity Framework, and React. Integrated secure payment gateways supporting in-store and online transactions with PCI compliance. Implemented React components with server-side rendering to enhance SEO and user engagement. Built scalable reporting and analytics modules for sales insights; optimized SQL Server queries for high availability. Collaborated with IT security to implement data privacy controls and documented system architecture.