Freelancer profile translated to English.
Back to original languageAbout Marcos Ivan
Senior Frontend Developer / Tech Lead with +8 years of experience building modern and scalable web products.
Specialist in React, Next.js, and TypeScript, with a focus on clean architecture, performance, and code quality. I work end-to-end: from problem definition to production deployment.
Complementary experience in Node.js and NestJS, designing robust APIs and services.
In recent projects, I integrated AI (LLMs, LangChain, RAG, agents) applied to real products.
I work closely with product and business teams, contributing technical vision, judgment, and execution.
👉 Available for freelance projects where quality, scalability, and impact are a priority.
Spanish
Native or bilingual
English
Conversational
Remote only
Primarily works remotely
Experience
- Freelance / ContractorSenior Frontend / Full-Stack JavaScript DeveloperTRAVEL AND TOURISMJanuary 2025 - January 2026 (1 year)• ● End-to-end feature development and implementation in web applications.• ● Integration with backend services and external APIs.• ● Development of AI automations and agents, including product-oriented multi-agent systems.• ● Implementation of a multi-agent system for travel package recommendations (flights, hotels, and activities), validating coherence by budget, dates, and destination.• ● Integration of LLMs for content generation, validation, and recommendation.• ● Performance, accessibility, and user experience improvements.• ● Work in agile environments and multidisciplinary teams.• ● Refactoring and application of good code practices.
- EYFrontend Tech LeadJanuary 2019 - January 2024 (5 years)• ● Definition of frontend architecture in enterprise applications.• ● Development and implementation with React, Next.js, and TypeScript.• ● Implementation of automated testing strategy with Jest and React Testing Library.• ● Technical mentoring, code reviews, and developer support.• ● Performance and UX optimization in large-scale applications.• ● Participation in technical demos with clients and stakeholders.
- Digital HouseFrontend ProfessorOctober 2022 - January 2023 (3 months)• ● Teaching React, Hooks, Context API, and Redux.• ● Teaching automated testing with Jest and React Testing Library.• ● Mentoring and support in real projects.• ● Focus on best practices, frontend architecture, and code quality.
Recommendations
Be the first to recommend Marcos Ivan
Help this freelancer shine by sharing your experience working together.
These freelancer profiles also match your criteria
Agatha Frydrych
Backend Java Software Engineer
4.7
(3)
2
Baptiste Duhen
Fullstack developer
4.6
(4)
5
Amed Hamou
Senior Lead Developer
4
(2)
7
Audrey Champion
Web developer
4.3
(3)
4
Education
- Information Systems EngineeringUTNIngeniería en Sistemas de Información
- Programming TechnicianUTNTécnico en Programación