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Alejandro Guiter

@alejandroguiter

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Frontend Engineer at Ciklum who migrated a core platform from Gatsby to Next.js and raised Lighthouse scores to 95+.

Spain

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At Ciklum, I led the end-to-end migration of a core web platform from Gatsby to Next.js. I raised Google Lighthouse scores from around 75 to 95+ across all metrics through server-side rendering, static generation, and asset optimization.

I also developed a modular UI component library integrated with Figma, and improved page loading through route prefetching, code splitting, and optimized data fetching. I used Cursor AI workflows to accelerate the legacy migration.

At Izertis, I architected frontend solutions for health-tech and enterprise fashion clients using React, Next.js, and TypeScript. I built a reusable component library aligned with Figma design systems and developed dynamic landing page generators with CMS integration.

At Folder IT, I developed end-to-end features for an agricultural microservices platform using React, NestJS, TypeScript, and MongoDB, including real-time data streaming from field machinery. Earlier, I delivered web applications for international clients at Serfe and researched AI and NLP techniques at Universidad Tecnólogica Nacional.

Experience

Work history, roles, and key accomplishments

Frontend Engineer

Ciklum

Nov 2025 - Jul 2026 (8 months)

Led the end-to-end legacy migration of a core web platform from Gatsby to Next.js, modernizing the tech stack and architecture. Boosted Google Lighthouse scores from around 75 to 95+ across all metrics by leveraging SSR, static site generation, and aggressive asset optimization.

React Next.js Gatsby TypeScript SSR Static Site Generation Asset Optimization Cursor AI driven workflows Figma UI Component Library Core Web Vitals Performance Accessibility SEO

Frontend Developer

Izertis

Oct 2023 - May 2025 (1 year 7 months)

Architected greenfield frontend solutions for health-tech and enterprise fashion clients using React, Next.js, and TypeScript, establishing foundational project structures and coding standards. Designed and built a custom reusable component library aligned with Figma design systems, accelerating UI development across cross-functional product teams.

React Next.js TypeScript Figma Component Libraries SEO WCAG GitHub Co Pilot Performance Optimization State Management CMS Integration

Full Stack Developer

Folder IT

Sep 2021 - Sep 2023 (2 years)

Architected and developed end-to-end features for a large-scale agricultural microservices platform using React, NestJS, TypeScript, and MongoDB, managing real-time data streaming from field machinery. Optimized database performance by restructuring MongoDB queries and indexing strategy, reducing load times significantly.

React NestJS TypeScript MongoDB Microservices Real Time Data Streaming Database Optimization Code Splitting Lazy Loading Route Prefetching Technical Discovery Client Communication Microsoft Cloud Services

Full Stack Developer

Serfe

Apr 2021 - Sep 2021 (5 months)

Delivered 10+ web applications end-to-end for international clients using React and WordPress, taking full ownership of production deployments and client communication. Engineered scalable frontend components and features independently under tight deadlines, ensuring high code quality and fast delivery cycles.

React WordPress Production Deployment Client Communication Frontend Development Scalable Components

Intern R+D

Universidad Tecnólogica Nacional

Jul 2020 - Dec 2020 (5 months)

Researched and implemented AI and Natural Language Processing (NLP) techniques for business process analysis. Developed automated solutions using Python and spaCy to enhance data-driven decision-making within the research department.

AI NLP Python SpaCy Research Automation