Available to hire
Hi, I’m Michael Espinoza, a Senior Software Engineer with over 10 years of experience in front-end and backend development. I specialize in building scalable web applications using modern frameworks like React, Next.js, and Angular, and I also have deep expertise with backend technologies such as Node.js, Python, and Go. I enjoy architecting cloud-native applications and implementing performance optimizations to create seamless user experiences.
I’m passionate about mentoring teams and driving technical excellence, always advocating for best engineering practices and continuous improvement. Over the years, I’ve contributed to various sectors including AI/ML, FinTech, healthcare, and e-commerce, which has fueled my excitement for creating impactful software solutions.
Skills
Language
English
Fluent
Work Experience
Senior Software Engineer at IT Solutions
February 1, 2023 - March 21, 2025Led front-end development for startups, integrating AI/ML solutions and enabling seamless data visualization. Managed a team of 5 to deliver a scalable SPA with NextJS, React, Redux, and additional tools improving load times significantly. Designed responsive UI/UX using Figma and Sketch while ensuring accessibility and multi-language support. Architected data management systems using RTK and React-Query with REST and GraphQL APIs incorporated in TypeScript/Python/Go microservices. Oversaw database design and system monitoring via Prometheus, ELK Stack, Grafana, and Sentry. Configured CI/CD pipelines and used AWS CDK/Terraform for infrastructure automation. Mentored junior developers increasing team delivery speed by 40%.
Senior Web Developer at DraftKings
February 1, 2018 - February 28, 2023Engineered a high-traffic sports betting platform supporting real-time tracking and secure authentication for millions of users. Led enterprise component library development with Nx monorepo and Storybook, optimizing UI consistency. Built responsive design systems and redesigned feature flag tools and CMS to support multi-brand and localization requirements. Implemented performance optimizations using Next.js SSR/ISR, caching, and load balancing technologies. Developed interactive data visualizations and real-time odds interfaces with WebSocket and Redis. Managed data streams with Apache Kafka and RabbitMQ. Designed a role-based authentication system ensuring SOC2 compliance. Established comprehensive testing with Jest, React-testing, Cucumber, and Playwright.
Web Developer at Accenture
October 1, 2013 - February 28, 2018Developed a remote patient monitoring system improving real-time healthcare delivery. Built customer-facing web apps using React, Angular, and TypeScript with Redux for state management. Improved performance with AWS CloudFront, lazy loading, and React virtualization techniques. Designed a realtime ECG monitor using WebSocket and built secure APIs with Node.js and NestJS using JWT authentication. Integrated RESTful APIs from Laravel backend and Stripe for subscriptions. Processed HL7 healthcare messages using Mirth Connect, AWS Kinesis, S3, Lambda functions, and DynamoDB.
Senior Software Engineer at IT Solutions
February 1, 2023 - March 1, 2025Orchestrated front-end development for startups, creating intuitive interfaces that integrated AI/ML solutions across industries, enabling seamless data visualization for business analytics. Led a team of 5 to develop a high-performance single-page application using NextJS, React, Redux, and advanced UI libraries, reducing load times. Created responsive UI/UX designs with Figma and Sketch and implemented accessibility and multi-language support increasing user engagement by 25%. Architected efficient data management systems integrating REST and GraphQL APIs within a microservices ecosystem and optimized data models across multiple databases. Established comprehensive monitoring and CI/CD pipelines using Prometheus, ELK Stack, Github Actions, Jenkins, Docker, and AWS CDK. Mentored junior developers, improving team productivity by 40%.
Senior Web Developer at DraftKings
February 1, 2018 - February 1, 2023Engineered a high-traffic sports betting platform delivering real-time event tracking, secure authentication, and bet management for millions of users. Led development of enterprise-scale component libraries and responsive design systems, enhancing UI documentation and scalability. Redesigned CMS and feature flag tools improving flexibility. Implemented performance optimizations via server-side rendering, caching, and lazy loading. Developed interactive data visualizations and real-time odds tracking interfaces with WebSocket and Redis. Managed multi-provider data streams using Kafka and RabbitMQ. Designed role-based authentication systems ensuring SOC2 compliance and reduced unauthorized access. Established comprehensive testing scenarios with unit and E2E testing tools.
Web Developer at Accenture
October 1, 2013 - February 1, 2018Developed an innovative remote patient monitoring system revolutionizing real-time healthcare delivery. Built customer-facing web applications with React, Angular, and TypeScript managing state with Redux. Improved performance through AWS CloudFront CDN, lazy loading, and React virtualization. Architected real-time ECG monitoring using WebSocket. Built secure API layers and integrated over 50 backend APIs including payment processing services. Processed HL7 messages and set up Mirth Connect channels, AWS Kinesis Streams, Lambda functions with Python, and DynamoDB.
Education
Bachelor of Science at University of Nevada, Reno
August 1, 2007 - May 31, 2011Master of Science at University of Nevada, Reno
August 1, 2011 - May 31, 2013Bachelor of Science in Computer Science at University of Nevada, Reno
August 1, 2007 - May 31, 2011Master of Science in Computer Science at University of Nevada, Reno
August 1, 2011 - May 31, 2013Qualifications
Advanced Next.js Development (Coursera)
January 11, 2030 - June 26, 2025React & Modern JavaScript (Udemy)
January 11, 2030 - June 26, 2025AWS Certified DevOps Engineer (AWS)
January 11, 2030 - June 26, 2025Advanced Next.js Development (Coursera)
January 1, 2022 - December 31, 2022React & Modern JavaScript (Udemy)
January 1, 2021 - December 31, 2021AWS Certified DevOps Engineer (AWS)
January 1, 2020 - December 31, 2020Industry Experience
Software & Internet, Healthcare, Financial Services, Media & Entertainment, Gaming
Skills
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