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Open to senior / lead frontend roles

Braian
Bernatto.

React.js Lead Frontend Developer

Architecting and scaling high-performance React applications. Lead the technical modernization of an enterprise banking platform across the modern React ecosystem — TypeScript, TanStack, and a design-system mindset.

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Frontend

BB

GMT-3 · Asunción

5+
Years in software
4
Production roles
90%
Bugs cut via QA standards
80%
Faster audit tooling

About

Bridging product vision and scalable execution.

Lead Frontend Developer with over 5 years of software development experience, currently specializing in architecting and scaling high-performance web applications. Focused on the modern React ecosystem (TypeScript, TanStack Suite) and driving technical modernization for enterprise platforms. Proven track record of improving Developer Experience (DX) by establishing clear architectural guidelines, comprehensive documentation, and strict code quality standards that drastically accelerate team onboarding. Passionate about bridging the gap between product requirements and scalable technical execution.

Architecture & Modernization

Migrating teams onto modern React ecosystems — TypeScript, TanStack, and design-system thinking — to cut load times and stabilize server state at scale.

Developer Experience

Living in-repo documentation: a curated README paired with auto-generated TSDoc component reference, so the codebase stays self-documenting and onboarding is self-serve.

Quality Engineering

Comprehensive testing standards and ESLint guardrails baked into CI — raising deployment reliability and shipping with confidence.

Experience

Five years shipping production software.

From full-stack government tooling to leading frontend architecture on an enterprise banking platform.

  1. Tu Financiera

    May 2024 — Present

    Lead Frontend DeveloperCurrent

    Architecting and scaling an enterprise banking platform on a modern React ecosystem.

    Architecture & Modernization

    Architected and led the technical migration to a modern frontend ecosystem, significantly reducing load times and optimizing server state management for an enterprise banking platform.

    Quality Assurance

    Established comprehensive testing standards and enforced strict code-quality guardrails via ESLint and automated formatting, increasing deployment reliability to production.

    Technical Leadership

    Kept the codebase self-documenting through living in-repo documentation — a curated README paired with auto-generated TSDoc component reference — streamlining the development lifecycle and drastically reducing the onboarding time for new developers.

    • React.js
    • TypeScript
    • shadcn/ui
    • TailwindCSS
    • Zustand
    • TanStack Query
    • Zod + RHF
    • Storybook
    • Vitest

  2. Innovatica

    Jan 2023 — May 2024

    Frontend Developer

    Web & Mobile Delivery

    Developed and maintained complex web and mobile applications using React.js and React Native, strictly adhering to modern coding standards.

    Cross-functional Collaboration

    Collaborated with cross-functional teams during requirements gathering, providing technical insights to define project scope and feasibility.

    API Integration & Performance

    Integrated frontend UI components with backend APIs, optimizing rendering cycles and overall application performance.

    Debugging & UI Testing

    Executed thorough debugging protocols and UI testing, reducing bug incidence and ensuring high-quality product delivery.

    • React.js
    • React Native
    • TypeScript
    • MaterialUI
    • Jotai

  3. Tribunal Superior de Justicia Electoral

    Mar 2020 — Dec 2022

    Full-Stack Developer

    Tender Contract Monitoring

    Developed a web application to monitor government tender contract balances, delivering real-time visual reports and reducing execution errors by 90%.

    Date & Holiday Calculator

    Built a dynamic date and holiday calculator tailored for Paraguay's calendar, accelerating the audit process by 80% across multiple government departments.

    • Next.js
    • TailwindCSS
    • Node.js
    • Express
    • PostgreSQL
    • Strapi
    • Chart.js
    • JWT

  4. Tribunal Superior de Justicia Electoral

    Jan 2019 — Feb 2020

    Full-Stack Developer

    String Generator App

    Engineered a robust string generator web application equipped with CRUD operations and authentication features, reducing typos by 90% in the preparation of critical documents.

    • EJS
    • CSS
    • JavaScript
    • Node.js
    • Express
    • PostgreSQL

Skills

The toolkit behind the work.

A senior-frontend stack centered on the modern React ecosystem, with tooling, observability, and docs to keep teams moving.

Core & Languages

  • JavaScript (ES6+)
  • TypeScript
  • Node.js
  • SQL

Frontend Frameworks

  • React.js
  • Next.js
  • React Native
  • TanStack Start

Architecture & State

  • TanStack Suite
  • Zustand
  • Jotai

UI, Forms & Validation

  • TailwindCSS
  • shadcn/ui
  • MaterialUI
  • React Hook Form
  • Zod

Testing & Tooling

  • Vitest
  • MSW
  • Storybook
  • Vite
  • Bruno

Observability & Data

  • OpenTelemetry
  • Prisma ORM
  • PostgreSQL

Workflow & Docs

  • Git
  • Docker
  • Markdown
  • Mermaid.js
  • Confluence

Languages

  • English — C2 Proficient (EF SET)
  • Spanish — Native
  • Guarani — Native

Projects

Selected work.

Enterprise-grade builds and shipping products end-to-end — from government tooling to a banking platform.

Enterprise Banking Platform
Featured

May 2024 — Present

Enterprise Banking Platform

Lead Frontend Developer · Tu Financiera

The enterprise banking platform I lead at my current job — a high-stakes product built on a modern React ecosystem, where I drove the technical migration, set the engineering standards, and shipped the design system that accelerated the whole team.

  • Architecture & Modernization — Architected and led the technical migration to a modern frontend ecosystem, significantly reducing load times and optimizing server state management for an enterprise banking platform.
  • Quality Assurance — Established comprehensive testing standards and enforced strict code-quality guardrails via ESLint and automated formatting, increasing deployment reliability to production.
  • Technical Leadership — Kept the codebase self-documenting through living in-repo documentation — a curated README paired with auto-generated TSDoc component reference — streamlining the development lifecycle and drastically reducing the onboarding time for new developers.
  • React.js
  • TypeScript
  • shadcn/ui
  • TailwindCSS
  • Zustand
  • TanStack Query
  • Zod + RHF
  • Storybook
  • Vitest
Featured

2023 — Present

Eagle Eye Admin

Full-Stack Developer

Full-stack admin CMS powering Eagle Eye's website — managing players, coaching staff, teams and match statistics, feeding the public site through revalidation webhooks.

  • In-browser AI image pipeline: upload → crop → background removal → transparent PNG.
  • Full CRUD dashboards for roster and match statistics, built on TanStack Table.
  • Secure Google OAuth authentication over a relational Prisma/PostgreSQL schema.
  • Next.js 14
  • TypeScript
  • Prisma + PostgreSQL
  • NextAuth.js
  • shadcn/ui
  • TanStack Table
Aug 2022 — Sep 2022

Eagle Eye Website

Full-Stack Developer

A dynamic, multilingual website tailored for a soccer-centric business, with an intuitive contact form and seamless cross-language interactions via next-translate.

  • Shipped a multilingual experience with next-translate across multiple languages.
  • Integrated Google Maps API for location and a custom HTML5 theme.
  • Next.js
  • Google Maps API
  • Custom HTML5 Theme
  • next-translate
Visit site
2020 — 2022

Public Tenders Contracts

Full-Stack Developer

A web app to monitor government tender contract balances with real-time visual reports, reducing execution errors by 90%.

  • Delivered real-time visual reports on tender contract balances.
  • Reduced execution errors by 90% across audited processes.
  • Next.js
  • TailwindCSS
  • Node.js
  • Express
  • PostgreSQL
  • Strapi
  • Chart.js
  • JWT
2020 — 2022

Paraguay Days & Holiday Calculator

Full-Stack Developer

A dynamic date and holiday calculator tailored for Paraguay's calendar, accelerating the government audit process by 80%.

  • Accelerated audit workflows by 80% across multiple government departments.
  • Included an admin panel for holiday & calendar data manipulation.
  • Next.js
  • TailwindCSS
  • Node.js
  • Express
  • PostgreSQL
  • Strapi
  • Chart.js
  • JWT

More on GitHub

github.com/braian-bernatto

@braian-bernatto

Contact

Let's build something solid.

Open to senior and lead frontend roles. Reach out through the form or any of the channels below — I will get back to you as soon as possible.

Email

braian5353@gmail.com

Phone

+595 983 709 234

Location

Asunción, Paraguay (GMT-3)

LinkedIn

linkedin.com/in/braian-bernatto

Open to senior / lead frontend roles

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