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Jonatan Villalba

@jonatanvillalba

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I build high-performance enterprise e-commerce storefronts and apps with Angular, React, Next.js, and SAP Spartacus.

Argentina

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What I'm looking for

I'm open to remote Senior Frontend or Full Stack roles across US and EU time zones, where I can build enterprise e-commerce products, lead technical architecture, improve performance, and create reusable systems.

Senior Frontend Engineer and Technical Lead with 8+ years of experience architecting and delivering high-traffic web applications, enterprise e-commerce platforms, and AI-accelerated Backend-for-Frontend (BFF) layers with Next.js and Node.js. Expert in modern React/Next.js (v14-v16 App Router, SSR/SSG, TanStack Query, Zustand) and modern frontend architectures. Hands-on experience implementing AI SDK patterns (streaming, tool calling, structured output, generative UI) and AI-assisted workflows (Claude Code, Cursor). Proven record designing scalable Design Systems (Tailwind CSS, component libraries), orchestrating GraphQL and RESTful APIs, enforcing TDD/CI-CD standards, and optimizing Core Web Vitals and WCAG accessibility. Extensive background in enterprise storefronts and microservices. Fluent in English (C1 EF SET).

Experience

Work history, roles, and key accomplishments

Senior Frontend Developer

QUBIK COMMERCE

Feb 2021 - Jun 2026 (5 years 4 months)

Architected enterprise web & e-commerce apps with React, Next.js, and TypeScript. Built Next.js BFFs integrating GraphQL/REST. Created modular monorepos and design systems, boosting multi-squad delivery by 40%. Optimized Core Web Vitals to improve load speed by 35%. Implemented TDD pipelines (Vitest, Cypress) and CI/CD workflows under Clean Architecture standards.

Tech Lead Front-End & Solution Architect

Onikom Latam

Oct 2024 - Mar 2025 (5 months)

Designed and led a zip-code-based dynamic pricing feature inside SAP Composable Storefront (Spartacus): real-time catalog updates, warehouse assignment and zone-specific price lists, deployed on SAP Cloud (CCv2).

Key Achievements & Responsibilities:

Dynamic Pricing Architecture: Led the design and development of a core feature within SAP Composable Storefront for dynamic pricing based on user zi

Git Jira Angular NgRX Google Tag Manager Arquitectura TypeScript Bitbucket JavaScript SAP Commerce Cloud SAP Spartacus SAP Composable Storefront Confluence

Tech Lead Front-End & Solution Architect

Onikom Latam

Feb 2023 - Jul 2023 (5 months)

Architected a high-traffic Angular storefront baseline with reusable components and robust API layers. Authored TDDs, defined frontend contracts, and oversaw sprint execution. Mentored engineering squads on RxJS reactive patterns, modular architecture, and automated unit testing best practices.

Angular RxJS Commerce SAP Commerce SAP Spartacus Frontend Architecture Frontend Development TypeScript SCSS JavaScript

Full Stack Engineer (Freelance)

JDV Developer

Mar 2018 - Mar 2021 (3 years)

Built custom end-to-end web and mobile applications for SMB clients with MERN and MEAN stacks, including secure Mercado Pago Checkout Pro integrations.

Key Achievements & Responsibilities:

Full Stack Architecture & Development: Designed and developed custom end-to-end web applications utilizing MERN (React.js) and MEAN (Angular 11+) stacks. Built dynamic user interfaces backed by scalable Node.j

MongoDB Application Architecture Angular Google Tag Manager AngularJS MySQL JavaScript Node RxJS PostgreSQL React

Education

Degrees, certifications, and relevant coursework

Universidad Nacional de José Clemente Paz (UNPAZ)

B.D. in Systems Analyst

2019 - 2023

Universidad Nacional de José Clemente Paz (UNPAZ)

Bachelor's Degree in Systems Analysis, Systems Analysis

2019 - 2023

Grade: 8.72/10

Pursued a degree in Systems Analysis, achieving a GPA of 8.72/10.

Polotic Misiones

Fullstack Web Development with Javascript and Python, COMPUTER AND INFORMATION SCIENCES AND SUPPORT SERVICES

2020 - 2020

Desarrollo fullstack con python fastapi y javascript react

Universidad Austral, Buenos Aires

Desarrollo del Lado del Servidor: NodeJS, Express y MongoDB

2020 - 2020

Curso desarrollado por la Universidad Austral, a través de la plataforma de la plataforma coursera.org, el programa del curso enseña las bases del desarrollo back-end con la utilización del lenguaje NodeJS, mediante la libreria Express y la conección a la base de datos NoSQL para la persistencia de datos con MongoDB, mediante la utilización de la libreria Mongoose