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

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.