Pablo Agustín Haller Díaz
Pablo Agustín Haller Díaz

Senior Frontend Engineer

Actively looking · Member since 29 Oct 2026
Location
Montevideo, Uruguay
Desired salary
Unspecified
Work preference
Remote Only
Experience level
Senior

About

Professional summary

I am a Senior Software and Frontend Engineer with nearly a decade of experience building scalable, accessible, and user-focused web applications. My primary expertise is in React, Next.js, TypeScript, and modern frontend architecture.

I have led frontend teams, performed extensive code reviews, mentored junior developers, and helped establish engineering practices that improve scalability, maintainability, and delivery quality. I am comfortable collaborating with stakeholders to define technical strategy, estimate work, and plan product roadmaps.

My experience spans fintech, e-commerce, booking platforms, accounting software, payroll products, and enterprise applications. I have delivered features for white-labeled marketplaces, internal business systems, SharePoint solutions, and electronic invoicing platforms.

I focus strongly on performance, accessibility, responsive design, and reusable component development. I have worked with WCAG-oriented accessibility requirements and improved application performance through cloud migrations and deployment optimization.

I also have hands-on experience with CI/CD, Git workflows, semantic versioning, Azure App Services, IIS, Vercel, and Cloudflare Workers. I enjoy introducing practical tools and processes that help teams work more effectively.

I bring a collaborative, product-minded approach to engineering, combining technical depth with client communication, requirement gathering, and ongoing support for delivered solutions.

Skills

32 capabilities

Tech stack & tools

Working toolkit

Application Hosting

Application Utilities

Collaboration

Data Stores

Design

Development

Languages & Frameworks

Experience

Career history

Senior Frontend Engineer Arionkoder

Maintained and developed features for a booking application covering flights, hotels, cars, dining, and activities using Next.js.

Supported white-label implementations for different clients while prioritizing accessible user experiences and web accessibility practices.

Senior Developer Booster Software

Maintained and developed features for an internal fintech time-tracking application built with Next.js 14, TypeScript, and Material UI. Worked with the Materio MUI template to extend the product interface and functionality.

Coordinated full-stack IIS deployments and migrated the frontend to Azure App Services. Improved response speed by more than 90% through the migration, configured three deployment slots, and co-implemented Git workflows and semantic versioning.

Engineering Lead GoGrow

Led frontend development for startup marketplaces using Next.js, TypeScript, Tailwind CSS, Algolia, and Typesense. Implemented optimized search experiences with Algolia InstantSearch and Typesense.

Performed code reviews, analyzed project scopes, estimated delivery timelines, and collaborated with stakeholders on technical strategy. Mentored junior developers and introduced tools and practices to improve team performance, code quality, scalability, and maintainability.

React Developer OneTree

Developed SharePoint web parts from scratch using SPFx, React, and TypeScript. Integrated application data using PnP.js and generated PDF reports with jsPDF to support business workflows.

Automated routine processes with Azure Logic Apps and handled deployment and maintenance activities. Worked closely with Business Analysts to define user stories, collect client requirements, and plan product roadmaps.

Software Engineer Ascentis

Developed and maintained reusable frontend components for payroll solutions using React, Redux, Sass, and BEM. Improved UI consistency and component reuse across multiple HR applications.

Collaborated with several Scrum teams and contributed to the company's rebranding process. Worked across large codebases with HR product teams using JavaServer Pages and ASP.NET.

Junior Analyst GSOFT Uruguay

Developed and maintained Factura Express, an electronic invoicing and accounting web platform. Implemented features using JavaServer Pages, JavaScript, jQuery, Bootstrap, and SQL Server.

Gathered requirements directly from clients, optimized SQL queries, and improved overall system performance. Delivered training sessions and provided customer and technical support for the product.

Education

Learning history

Universidad Católica del Uruguay

Bachelor, Software Engineering

Bachelor's degree in Software Engineering.

Universidad Católica del Uruguay

Bachelor, Information Technologies

Bachelor's degree in Information Technologies.

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