Senior Frontend Developer
Agustín
Mesas
6+ years delivering high-impact frontends at Avalith — from Argentina's leading digital wallet to Latin America's largest e-commerce platform. Specialized in React, Next.js, and React Native, building interfaces at scale that millions of people use daily.
Projects
16 totalTasime
Personal project. Chrome extension that replaces the new tab with a full bookmark and notes manager — real-time sync across devices, pinning and organization, soft-delete with recycle bin, and active tabs view.
MODO
Leading digital wallet in Argentina. Built key payment flows — transfers, QR payments, and savings — handling high-concurrency transactions for millions of users.
Mercado Libre
Built the loyalty rewards program frontend for a major e-commerce platform, engineering complex state management for high performance under peak traffic loads.
N5 NOW
Banking dashboard integrating real-time data from core systems across multiple financial institutions with complex data visualizations and end-to-end testing coverage.
CLARO
Internal administrative system for mobile line lifecycle management, improving operator workflows.
Swiss Medical
Healthcare management app for medical records, appointments, and emergency services.
Grow with Jane
Social platform for plant enthusiasts to track plant growth and share progress with community members.
BASF Agro
Commercial goal management system for sales ambassadors, tracking sales targets and visits.
Paper Chef
Internal management platform for paper wholesale order and product administration.
Viasano
Mobile application for healthcare members to manage personal data and temporary credentials.
Llevox
Mobile app connecting clients with transport providers, featuring real-time tracking and efficient route management.
Fox Decoder
System for TV signal decoding and electronic program guide (EPG) schedule management.
Qupro
Management system for client relations, sales, and invoicing.
Medicos Online
Telemedicine platform connecting doctors and patients with integrated consultation analytics.
Experience
Avalith
Led frontend development across 15+ client projects serving millions of users in fintech, healthcare, and e-commerce. Working in cross-functional teams of 5–15 engineers under SCRUM methodology with 2-week sprint cycles in the React ecosystem — React.js, React Native, Next.js.
- Built core payment flows for MODO, Argentina's leading digital wallet — transfers, QR payments, and savings using React, Next.js and TypeScript.
- Developed the loyalty rewards frontend for MercadoLibre, Latin America's largest e-commerce platform, engineering complex state management with Reselect under peak traffic loads.
- Delivered real-time banking dashboards for N5 NOW integrating core financial systems, with end-to-end Playwright testing and live data via react-query.
- Contributed to React Native apps for Swiss Medical and Viasano serving thousands of daily active users.
Skills
- SCRUM methodology
- Cross-functional teamwork
- Problem-solving and decision-making
- Effective communication
Get in touch
Open to new opportunities, freelance projects, and interesting collaborations.
mesas.agustin.e@gmail.com