MY EXPERTISE
Building scalable, high-performance web applications using React.js, Next.js, and TypeScript. Specialized in modern frontend architectures, performance optimization, and reusable component development.
End-to-end solutions from frontend to API integration. Experienced with GraphQL, REST APIs, MongoDB databases, and microservices architectures for enterprise applications.
Creating intuitive interfaces and business-focused user experiences. Specialized in design systems, accessible components, and conversion optimization for web and mobile applications.
Web performance audits and optimization, technical SEO, and Core Web Vitals improvement. Implementing caching strategies, lazy loading, and bundle optimization for high-traffic applications.
Implementing testing strategies with Jest and React Testing Library. Developing CI/CD pipelines, automated testing, and quality assurance for business-critical applications.
Frontend architecture consulting, legacy technology migration, and application modernization. Experience across Fintech, E-commerce, Travel, and Healthcare sectors with focus on scalability.
RECENT WORK
276+
Completed Projects
96%
Positive Rating
E-Commerce & Travel
Senior Front-End Engineer (React, Next.js, Angular)
Fintech & Loyalty
Senior Front-End Engineer — Fintech Loyalty Platform (Angular, TypeScript)
E-Commerce & Retail
Senior Front-End Engineer (React / Next.js)
E-Commerce & Retail
Senior Front-End Engineer (React / Next.js)
E-Commerce & Sports
React & Next.js Front-End Engineer | High-Traffic E-commerce Platforms
Healthcare & Medical
Senior Front-End Engineer (React / WordPress)
Hi, I'm a Senior Front-End Engineer with 9+ years of experience building high-performance web applications. I specialize in React, Next.js, Angular, and TypeScript, creating scalable solutions for enterprise clients across Fintech, E-commerce, Travel, and Healthcare sectors. My expertise includes performance optimization, testing strategies, and modern front-end architecture that delivers exceptional user experiences.
React, Next.js, Angular Specialist
SEO, Testing & Optimization Specialist
Ready to discuss your next project? Let's create something amazing together. I specialize in high-performance web applications and scalable frontend solutions.
MY EMAIL
danyeistj@gmail.com
Available for new projects
LOCATION
Colombia
Remote & On-site available
PHONE
+57 300 812 7497
9+ years experience
