Senior Frontend Engineer

About us Radiant Security is building the most advanced AI SOC platform, featuring unbounded alert triage, investigation, and response for security teams at scale. Our platform ingests alerts from across an organization's entire security stack (SIEM, EDR, identity, cloud) and uses AI to triage, investigate, and surface what actually matters. We're replacing alert fatigue with clear signal, so analysts can focus on real threats. We're a small, fast-moving team. We ship continuously, stay close to customers, and hold ourselves to a high standard. Our product touches the daily workflows of security teams, and decisions we make have a direct impact on how quickly threats get resolved. 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 an experienced Frontend Engineer with expertise 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 5+ years of experience in frontend development with multiple UI frameworks . Proven track record of delivering visually appealing and intuitive user interfaces. Expertise in Typescript, CSS and Web Platform Standards overall. Experience working with Design Systems in Figma. Experience creating and maintaining UI Component libraries used across multiple teams. Strong understanding of Web Vitals and other performance metrics. Strong understanding of 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