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I am a Senior Full Stack Software Engineer with 8+ years of experience designing, developing, and deploying high-performance web and mobile applications. I have delivered MVPs, SaaS platforms, and enterprise-grade solutions, and I leverage cloud platforms (AWS, Azure, GCP) with CI/CD, Docker, Kubernetes, and Terraform to build scalable, cloud-native systems. I am proficient in relational and non-relational databases, hands-on with real-time systems, API integration, and microservices architectures (REST, GraphQL, MQTT, SNS, SQS). I work in Agile/Scrum, applying TDD/BDD and modern testing tools (Cypress, Jest, Playwright, Selenium) to ensure quality and reliable releases. I have experience leading cross-functional teams, collaborating with CEOs and product managers to translate business goals into scalable technology while balancing speed and long-term maintainability. I also have additional experience with Java backend services to support versatility across environments.…I am a Senior Full Stack Software Engineer with 8+ years of experience designing, developing, and deploying high-performance web and mobile applications. I have delivered MVPs, SaaS platforms, and enterprise-grade solutions, and I leverage cloud platforms (AWS, Azure, GCP) with CI/CD, Docker, Kubernetes, and Terraform to build scalable, cloud-native systems. I am proficient in relational and non-relational databases, hands-on with real-time systems, API integration, and microservices architectures (REST, GraphQL, MQTT, SNS, SQS). I work in Agile/Scrum, applying TDD/BDD and modern testing tools (Cypress, Jest, Playwright, Selenium) to ensure quality and reliable releases. I have experience leading cross-functional teams, collaborating with CEOs and product managers to translate business goals into scalable technology while balancing speed and long-term maintainability. I also have additional experience with Java backend services to support versatility across environments.

David Lee Estrada

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

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I am a Senior Full Stack Software Engineer with 8+ years of experience designing, developing, and deploying high-performance web and mobile applications. I have delivered MVPs, SaaS platforms, and enterprise-grade solutions, and I leverage cloud platforms (AWS, Azure, GCP) with CI/CD, Docker, Kubernetes, and Terraform to build scalable, cloud-native systems. I am proficient in relational and non-relational databases, hands-on with real-time systems, API integration, and microservices architectures (REST, GraphQL, MQTT, SNS, SQS). I work in Agile/Scrum, applying TDD/BDD and modern testing tools (Cypress, Jest, Playwright, Selenium) to ensure quality and reliable releases. I have experience leading cross-functional teams, collaborating with CEOs and product managers to translate business goals into scalable technology while balancing speed and long-term maintainability. I also have additional experience with Java backend services to support versatility across environments.…I am a Senior Full Stack Software Engineer with 8+ years of experience designing, developing, and deploying high-performance web and mobile applications. I have delivered MVPs, SaaS platforms, and enterprise-grade solutions, and I leverage cloud platforms (AWS, Azure, GCP) with CI/CD, Docker, Kubernetes, and Terraform to build scalable, cloud-native systems. I am proficient in relational and non-relational databases, hands-on with real-time systems, API integration, and microservices architectures (REST, GraphQL, MQTT, SNS, SQS). I work in Agile/Scrum, applying TDD/BDD and modern testing tools (Cypress, Jest, Playwright, Selenium) to ensure quality and reliable releases. I have experience leading cross-functional teams, collaborating with CEOs and product managers to translate business goals into scalable technology while balancing speed and long-term maintainability. I also have additional experience with Java backend services to support versatility across environments.

Available to hire

I am a Senior Full Stack Software Engineer with 8+ years of experience designing, developing, and deploying high-performance web and mobile applications. I have delivered MVPs, SaaS platforms, and enterprise-grade solutions, and I leverage cloud platforms (AWS, Azure, GCP) with CI/CD, Docker, Kubernetes, and Terraform to build scalable, cloud-native systems. I am proficient in relational and non-relational databases, hands-on with real-time systems, API integration, and microservices architectures (REST, GraphQL, MQTT, SNS, SQS). I work in Agile/Scrum, applying TDD/BDD and modern testing tools (Cypress, Jest, Playwright, Selenium) to ensure quality and reliable releases. I have experience leading cross-functional teams, collaborating with CEOs and product managers to translate business goals into scalable technology while balancing speed and long-term maintainability. I also have additional experience with Java backend services to support versatility across environments.

Skills

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Expert

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Intermediate

Language

English

Fluent

Work Experience

Senior Full Stack Engineer at Sustainabli

January 1, 2025 - Present

Led design and deployment of a scalable SaaS backend (Node.js) and Next.js frontend with TypeScript, focusing on modular, maintainable code. Built real-time IoT data visualizations using D3.js and Chart.js to monitor large sensor streams. Optimized MQTT-based communications for low-latency, reliable device-cloud messaging. Deployed cloud-native infrastructure on AWS (EC2, Lambda, S3, RDS, CloudWatch, Security Hub, SNS, IAM) to ensure high availability and security. Designed an admin dashboard with system health monitoring, real-time alerts, and anomaly detection. Automated CI/CD pipelines with GitHub Actions. Mentored junior engineers and conducted performance/load testing to identify bottlenecks and improve resilience. Collaborated with product managers and executives to align technical decisions with business goals.

Senior React Native Full Stack Developer at Votebud

January 1, 2025 - October 20, 2025

Led end-to-end development of a cross-platform mobile application in React Native, ensuring consistent functionality and UI/UX on iOS and Android. Integrated Firebase real-time database and Cloud Functions to improve data synchronization and reliability. Architected AI-powered summarization tools for legislative bills and policy documents, boosting user engagement. Implemented one-tap polling and advocacy features to raise participation. Directed a distributed team of six offshore developers, managing sprint planning, standups, and retrospectives in Agile/Scrum. Strengthened product reliability with automated testing using Jest and React Testing Library, reducing production issues. Built CI/CD pipelines with Firebase Hosting and GitHub Actions for faster releases. Implemented secure authentication with RBAC and social logins.

Senior Software Developer at Boca Web Agency

August 1, 2024 - October 20, 2025

Delivered MVPs and production systems for clients across civic tech, edtech, sustainability, and healthcare. Built PWAs with React, TypeScript, and Material-UI, adding offline capabilities and responsive design. Designed and maintained high-performance APIs with Django REST Framework and FastAPI, enabling scalable backend integrations. Refactored and optimized Health Tap’s Node.js APIs to improve data retrieval speeds by 25% and reduce backend load. Ensured HIPAA compliance while deploying healthcare apps on AWS (Route 53, CloudFront, S3) with proper security configurations. Conducted platform security audits and improved compliance. Implemented CI/CD workflows with Jenkins and GitHub Actions and mentored junior developers on React, API design, and DevOps practices.

Full Stack Developer at Denver Auto Company

January 1, 2022 - October 20, 2025

Designed and launched a SPA using React, TypeScript, and Tailwind CSS, boosting customer engagement by 30% with improved UI/UX. Built a mobile app version in React Native to maintain feature parity across platforms. Collected user feedback to deliver data-driven enhancements, reducing support tickets by 20%. Developed and deployed Node.js/Express APIs to enable seamless backend integration. Architected secure media storage with AWS S3 and CloudFront to optimize delivery times. Collaborated in Agile ceremonies to ensure transparency and steady progress.

Full Stack Developer at Ziker Technology

March 1, 2021 - October 20, 2025

Built a feature-rich SPA/PWA for PropertyPal using React/TypeScript with a Flask backend, delivering offline capabilities and improved performance. Optimized Flask queries and database migrations, reducing execution times by 40%. Modernized The Early Education Station website with React/Redux/TypeScript. Integrated third-party APIs to extend functionality and improve offerings. Implemented automated testing pipelines and deployed on Azure.

Full Stack Developer at Octaria Software Development

February 1, 2020 - October 20, 2025

Developed an admin management PWA for Listing Loop using React/TypeScript, delivering efficient tools for property management. Orchestrated Firebase database migration scripts with minimal downtime. Designed and implemented SonderMind’s early-stage platform UI, increasing user engagement. Conducted testing with Jest and Redux-Saga to ensure stable releases. Contributed to the adoption of a microservices architecture and implemented CI/CD pipelines to automate testing, building, and deployment. Authored API and architecture documentation to improve team collaboration.