Frontend Developer • Angular • React

Hermino Júnior

Minimal, accessible interfaces with a product mindset.

I design and build responsive web experiences with a focus on clarity, performance, and refined UI details. This portfolio highlights selected work, skills, and the approach I bring to modern frontend teams.

View projects
5+ yearsFrontend experience
12+ productsDelivered for clients
Design-firstAccessible systems

About

About me

Frontend Developer with 5+ years of experience building modern, responsive web applications. Specialized in React.js, TypeScript, and Angular, with a strong foundation in UI/UX principles. Passionate about creating accessible, performant interfaces using the latest web technologies and best practices. Experienced in state management, component architecture, and responsive design.

Work

Featured projects

Automatic identification of fruits on scales

ITN

I developed the frontend interface for a web application that automatically identifies fruit types on supermarket scales. Built an intuitive Angular UI with Material Design, creating responsive components for real-time image display and classification results.

AngularNode.jsMaterial DesignSpring BootPostgreSQLPython

Performance Evaluation System

ITN

I built the frontend architecture for an employee performance evaluation system using Angular and Material Design. Created complex form workflows, data visualization dashboards, and responsive layouts to enhance the user experience for HR processes.

AngularNode.jsMaterial DesignC#ASP.NETSQLServer

Service Order Management System

ITN

I developed the Angular frontend for a service order management system in a bicycle manufacturing environment. Implemented dynamic forms, real-time status tracking interfaces, and optimized component architecture for production and maintenance workflows.

AngularNode.jsMaterial DesignC#ASP.NETSQLServer

System Based on Responsible Business Alliance (RBA) Patterns

ITN

The Responsible Business Alliance (RBA) is a code of conduct that companies can adopt and require from their suppliers. I built the frontend interface using Angular to create an intuitive platform for evaluating and certifying supplier compliance. Designed complex multi-step forms and interactive dashboards for assessment workflows.

AngularNode.jsMaterial DesignC#ASP.NETSQLServer

Automatic license plate identification

ITN

I developed the Angular frontend for an automated license plate recognition system. Created real-time monitoring interfaces, implemented image display components with Material Design, and built responsive dashboards for security and access control management.

AngularNode.jsMaterial DesignSpring BootPostgreSQLPython

Experience

Professional highlights

Developer II

INDT - Institute for Technological Development
02/2022 – Present

I joined the company as a junior frontend developer and quickly established myself as the lead frontend developer for web platforms. When demand arose for a new web application, I took ownership of the entire frontend architecture using React and TypeScript. I designed and implemented responsive, accessible interfaces with modern UI/UX best practices. After 9 months, I received a promotion due to high quality deliveries and exceptional frontend expertise.

Lead frontend developer on collaborative project with Motorola.
Built responsive, accessible interfaces using React and TypeScript.
Developed web application UI/UX for natural language processing tools.
Expertise in modern frontend architecture, state management, and UI/UX design.
ReactTypeScriptJavaScriptHTML5CSS3UI/UX DesignResponsive DesignAccessibility

Junior Systems Development Analyst

Northern Institute of Technology and Business - ITN
08/2020 - 02/2022

I worked as frontend developer on 5 projects, all using Angular 8+ with Material Design. I took ownership of the entire frontend architecture and UI/UX implementation. Despite working with legacy codebases and limited documentation, I successfully delivered modern, responsive interfaces with excellent user experience. Daily collaboration with clients helped shape intuitive designs that met business requirements.

Built responsive frontend interfaces for computer vision applications.
Led frontend development on 6 projects using Angular and Material Design.
AngularTypeScriptJavaScriptMaterial DesignHTML5CSS3Responsive DesignUI/UX

© 2026 Hermino Barbosa de Freitas Júnior