Careers Portfolio

Junior Frontend Engineer

Radiant Security

Radiant Security

Software Engineering
São Paulo, SP, Brazil
Posted on Feb 14, 2026

About us

We’re a SF Bay Area Cyber AI startup. We’ve raised funding from top tier investors. Our vision is simple: enable all security teams, to perform security operations with the efficiency and effectiveness needed to prevent breaches . We’re a small team of researchers and engineers with a deep focus in cyber and AI. Our product automates the triage for any security alert leveraging deep research, big data and dozens of AI Agents.

Join us and boost your career with hands-on AI experience.

This is a hybrid position in Brazil and we are attending the office 3 times a week, which is located in Vila Olimpia, São Paulo.

The Role

We are looking for a Frontend Engineer with experience in TypeScript, CSS and modern UI frameworks to help us build our user interfaces. The ideal candidate is passionate about designing exceptional user experiences and is capable of working closely with product, design and backend teams to deliver seamless web applications.

What you'll do

  • Develop web-based user interfaces in TypeScript, React, Next.js and Tailwind CSS.
  • Collaborate with the product and design teams to ship user-friendly, aesthetically pleasing interfaces.
  • Work closely with cross-functional teams to ensure consistency and alignment with backend and product requirements.

Things we’re looking for

  • Bachelor's Degree
  • 2+ years of experience in frontend development with any modern UI frameworks.
  • Proven track record of delivering visually appealing and intuitive user interfaces.
  • Experience working with Design Systems in Figma, Typescript, CSS.
  • Strong understanding of Web Platform Standards and frameworks
  • Familiarity with Web Vitals and other performance metrics.
  • Familiarity with frontend testing frameworks and tools (e.g., Jest, Cypress, Playwright).
  • Excellent communication and collaboration skills
  • Strong English Skills

Benefits

  • Health Insurance (Safety Wing)
  • Stay Healthy subsidy (for gym and sports)
  • Unlimited PTO (enjoy the holidays of your location)
  • Parental leave
  • Stock Options