Web Front End Developer - Senior / Lead / Architect - Brazil

About Kore Geosystems

Kore Geosystems is at the forefront of technology, leveraging AI and advanced software to deliver innovative solutions for the mining industry. Our products empower geologists and engineers to capture, manage, and analyze geological data faster and more accurately. With leadership experience from companies like Microsoft, our team combines deep technical expertise with a vision to transform how data powers mining operations.

The Opportunity

We’re seeking a hands-on Web Front-End Architect to lead Kore’s efforts in modern web application development. You’ll define and implement the front-end architecture for our next-generation platforms using ReactJS, TypeScript, Hooks, and Context API —while coding day-to-day.

This role requires deep technical ownership, architectural thinking, and the ability to work across multiple complex applications that integrate data visualization, analytics, and AI features.

Key Responsibilities

Lead and own the front-end architecture and design of scalable, high-performance web applications.

Develop and maintain applications using ReactJS, TypeScript, Hooks, Context API , and Redux / Flux patterns.

Design responsive, modular, and reusable UI components using frameworks like Material UI , Bootstrap , or Tailwind .

Work closely with backend and DevOps teams to ensure seamless CI / CD integration (preferably on Azure DevOps ).

Implement secure front-end integrations with Azure AD B2C or equivalent identity systems.

Use SVG and D3.js for advanced data visualizations (annotations, charting, and reporting).

Collaborate with product, design, and data teams to translate complex requirements into intuitive, performant UI solutions.

Ensure accessibility, cross-browser compatibility, and responsive design standards.

Drive front-end code quality, best practices, and technical mentorship within the team.

Required Skills & Experience

15+ years of professional experience in front-end or full-stack web development.

Expert-level proficiency in :

ReactJS , TypeScript , Context API , Hooks , and Redux / Flux patterns

HTML5, CSS3, and modern JavaScript (ES6+)

Solid understanding of Node.js concepts and front-end build pipelines.

Strong experience with responsive design frameworks (React Material, Bootstrap, Tailwind).

Hands-on experience with SVG and D3.js for visualizations.

Experience with CI / CD pipelines (Azure DevOps preferred).

Familiarity with security best practices , OAuth2 , and Azure B2C authentication.

Strong debugging, optimization, and performance tuning skills.

100% hands-on coding; ability to set architectural standards and lead by example.

Preferred Technologies

React Material Design

SVG / D3.js for data-driven UI

Azure DevOps CI / CD pipelines

Azure B2C for authentication and user management

React Router , Functional Components , and React Hooks

Who You Are

A technical leader who enjoys hands-on coding and architectural problem-solving.

Passionate about creating elegant, maintainable, and scalable UI systems.

Curious about data visualization, real-time apps, and next-gen UI technologies.

Comfortable collaborating with cross-functional, global teams.

Benefits

Health insurance for employee and family.

Two weeks of vacation + one week of sick leave annually.

Work-from-anywhere flexibility (Brazil only).

Annual performance bonus and salary revision.

Equal Opportunity

Kore Geosystems is an equal opportunity employer. We celebrate diversity and are committed to creating an inclusive environment for all employees.