Available to hire
Hi, I’m Ernesto, a seasoned Senior Software Engineer with over 8 years of experience building and scaling full-stack and backend systems. I specialize in a variety of technologies including JavaScript, TypeScript, Python, Java, and Go, and love working with modern cloud platforms like AWS, Azure, and GCP.
I’m passionate about mentoring and collaborating with teams to deliver high-quality applications with great performance and maintainability. I focus on code quality, test coverage, and engineering best practices, always striving to build scalable and efficient solutions that make a real impact.
Skills
Language
Javanese
Advanced
Aragonese
Advanced
Work Experience
Senior Software Engineer at Vention
June 1, 2024 - PresentLed full-stack development of small business and enterprise applications using React, Vue, JavaScript, TypeScript, Tailwind CSS, Node.js, Java, Spring Boot, Python, Django and Go. Architected and implemented scalable microservices and serverless solutions using Node.js / Express / NestJS, Go, Java / Spring Boot, Redis and Kafka. Developed an AI/ML-driven asset management platform for Siri using TypeScript, React, Go, Python and Django improving model deployment efficiency by 30%. Built a real-time patient data monitoring dashboard for UnitedHealth Group, supporting over 1 million clinicians and 100 million patients, leveraging React, TypeScript, Python and WebSocket. Integrated Redis, PostgreSQL and DynamoDB to optimize performance for caching and persistent storage. Designed and maintained a micro-frontend architecture using Webpack Module Federation. Automated end-to-end testing with React Testing Library, Jest, Playwright and Cucumber, achieving over 95% test coverage. Deployed cont
Senior Software Engineer at Gusto
May 31, 2024 - July 9, 2025Engineered scalable payroll and HR platforms using Node, TypeScript, React, NextJS, Java and Spring Boot. Modernized legacy AngularJS codebase by migrating to modular React, improving performance and developer efficiency. Developed high-performance GraphQL and REST APIs with Apollo Server, Node.js and Express, reducing response latency by 30%. Integrated Redis for in-memory caching, accelerating data retrieval times. Implemented A/B testing and feature flagging using Optimizely and Google Optimize, leading to a 15% boost in user engagement. Deployed cross-cloud solutions leveraging AWS and GCP services, including serverless functions via AWS Lambda. Containerized applications with Docker and managed deployments using Kubernetes. Mentored junior developers and promoted engineering excellence via thorough code reviews and best practices enforcement.
Fullstack Engineer at Roofr
August 31, 2020 - July 9, 2025Designed and developed a vertical SaaS platform for roofing contractors for quoting, project tracking and analytics. Built a dynamic React frontend using Redux, Material UI and WebSocket for real-time updates. Developed robust backend APIs with Node.js, Express and GraphQL, integrating PostgreSQL and MongoDB. Boosted developer productivity by automating CI/CD pipelines and improving codebase modularity and maintainability.
Software Engineer at Dataiku
February 1, 2018 - July 9, 2025Contributed to the development of collaborative data science tools with a focus on performance, scalability and user experience. Built responsive, accessible user interfaces using React, Redux and Material UI. Developed backend services with Node, Express, Python, FastAPI and PostgreSQL. Participated actively in Agile ceremonies and delivered high-impact features on tight deadlines through iterative development.
Education
Bachelor of Computer Science at University of Miami
January 1, 2011 - December 31, 2016Qualifications
Industry Experience
Software & Internet, Healthcare, Financial Services, Real Estate & Construction, Professional Services
Skills
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