Alejandro García Iglesias

Alejandro García Iglesias

Senior Frontend Engineer

Buenos Aires, Argentina
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Professional Summary

Senior Frontend Engineer with 19+ years of experience building product-focused web applications, combining a full-stack foundation with deep frontend specialization, UI architecture, and product thinking to turn complex problems into clear, effective user experiences.

I work beyond implementation, helping define product and technical solutions, improving architecture, creating reusable UI patterns, and simplifying complexity to help teams move faster.

I've often acted as a frontend reference across teams, driving refactors, improving design-to-development workflows, and contributing to product, UX, and technical decisions.

Focus Areas

  • Frontend architecture & system design
  • Design systems & reusable UI patterns
  • Product-focused frontend engineering
  • Design-to-development workflows
  • Senior Frontend Engineering roles with strong product and technical impact

Skills

Frontend Architecture
UI Engineering
Component Architecture
Design Systems
Next.js
React
TypeScript
Technical Leadership
JavaScript
Product & UX Collaboration
Design-to-development Workflows
Frontend Tooling & DX
Testing & Code Quality
Vue.js
Angular
CSS / Tailwind CSS
API Integration
Node.js
AI-assisted Development Workflows

Experience

Full history on LinkedIn →

Independent Product R&D & AI Consulting

Apr 2026 – Present

Senior Frontend Engineer

  • Built and iterated a React/Next.js AI knowledge assistant for Juana Casa, working directly with the studio's two founding partners and team members to translate project and operational knowledge needs into clear product flows backed by Mastra and RAG.
  • The knowledge-access problem identified with Juana Casa inspired an independent AI knowledge-intelligence product I am developing for companies, with the studio set to serve as its first real-world implementation; I am combining frontend and product engineering with a reusable layer, source-backed RAG, and authenticated MCP access to company data.
  • Evaluated and refined AI-assisted product design and frontend development workflows, combining coding agents, design tools, and agent orchestration across prototyping, implementation, testing, and review with explicit human verification.

Rotunda Software

Apr 2022 – Apr 2026

Senior Frontend Engineer · Remote

  • Acted as the main frontend reference across the team, supporting developers in UI-related decisions and implementation.
  • Led the evolution of the internal UI library (ModUI), improving APIs, simplifying styling systems, and increasing consistency.
  • Drove large-scale frontend refactors, including migrations of multiple applications and marketing sites.
  • Built interactive documentation and standardized reusable UI patterns and styling conventions, improving onboarding, consistency, and design-to-development handoff.
  • Improved frontend tooling and local development workflows, reducing friction for the engineering team.
  • Collaborated with backend, design, QA, and marketing to define technical and product solutions, implementing features from Figma designs and proactively identifying UX and implementation improvements.
  • Worked within a microservices-based architecture using a custom internal frontend framework, implementing Node.js and Express API endpoints to support frontend features.

BairesDev

Mar 2020 – Mar 2022

Senior Frontend Engineer · Remote

  • Worked on Pinterest's Experiments team, implementing and testing React UI variations in the core consumer product to support product experimentation.
  • Developed and owned the UI layer of internal advertising reporting tools, defining their information architecture and data presentation.
  • Expanded into backend responsibilities, learning Go and implementing APIs to deliver features end to end.
  • Collaborated in distributed teams and participated in code reviews and testing.

Mapme

Nov 2016 – Dec 2019

Senior Frontend Engineer · Remote

  • Helped evaluate and introduce Vue.js for a full rewrite of a Mapbox GL map-based product, then led the frontend implementation of the redesigned application from scratch.
  • Built a component-based architecture with Vue and Vuex, including reusable UI components designed for maintainability and scalability.
  • Collaborated closely with the CTO and CEO, translating business needs into practical, user-friendly UI solutions, often without formal designs.

Deviget

Dec 2013 – Apr 2016

Frontend Developer · Remote

  • Worked on a large-scale advertising platform (AppNexus).
  • Built modular UI components using AngularJS with strong testing practices.
  • Contributed to frontend structure improvements and CSS organization.
  • Participated in Style Guide development.
  • Collaborated in distributed cross-functional teams.
  • After AppNexus, built a React-based administration UI for corporate security policies for another client engagement.

Vulsai

2012 – 2013

Frontend Developer · Buenos Aires, AR

  • Primary frontend developer across multiple projects.
  • Introduced modern CSS tooling (Sass, Less, Compass), improving maintainability and structure of styles.
  • Built data visualization interfaces using D3.js.
  • Developed self-contained embeddable widgets.
  • Collaborated closely with design.

Earlier full-stack experience across four roles building web applications end-to-end with frontend, backend, APIs, databases, and infrastructure.