Software Engineer Frontend, Sign3

Title : Software Engineer Frontend About Sign3 Sign3 is an AI-first customer intelligence platform powering fraud prevention, risk scoring, and smarter onboarding decisions for leading FinTechs , banks, and digital businesses. Our flagship SDK and APIs analyze device, behavioral, and digital footprint signals to help clients detect synthetic identities, money mule accounts, and other fraud vectors in real time. We work with top-tier players across credit cards, lending, gaming, and neo-banking, helping them unlock trusted growth at scale. Our systems process millions of risk events per day, with millisecond-level performance and precision. At Sign3, you ll get to build in a fast-paced, impact-focused environment alongside a lean, high-ownership team. The Role We re looking for a Frontend Engineer to build the interfaces that turn Sign3 s fraud intelligence into decisions our customers act on every day risk dashboards, the rule engine, and investigation tools used by fraud and risk teams at some of the largest FinTechs in the country. This role is well-suited for engineers with 3 4 years of experience who have a strong command of JavaScript, build polished products in React and Next.js, write clean and performant code, and bring their own ideas to the table rather than waiting for a spec. You ll take real ownership of what you ship. What You ll Do Build and own the web consoles fraud teams rely on in React and Next.js Turn dense, complex datasets into clear, fast, interactive interfaces and data visualizations Build and extend a reusable component/design system so we ship consistently and quickly Integrate real-time risk APIs and model complex client state over large, frequently-updating datasets Treat performance as a feature fast loads, smooth interactions, and efficient rendering on data-heavy screens Ship features end to end with product, design, backend, and data science; contribute to design discussions, code reviews, and technical documentation Bring ideas propose better UX, patterns, and tooling; we don t hand out rigid specs What We re Looking For 3 4 years building production web frontends Strong JavaScript fundamentals the language itself: modern ES2015+ Strong React and state management with hands-on Next.js Solid HTML/CSS and a utility-first styling system (e.g., Tailwind) Comfort integrating REST APIs and presenting data clearly tables, charts, dashboards Clean, well-structured code, with a solid grasp of data structures and performance Product sense and a habit of bringing ideas and improvements to the table Strong sense of ownership; thrives in a fast-paced startup without rigid specifications Clear written and verbal communication in English Nice to Have Curiosity about how browsers really work under the hood and comfort playing with native browser APIs Experience building libraries or SDKs, especially browser-side Depth with build tooling (Rollup, Vite, Webpack, or Esbuild), including minification/obfuscation TypeScript; testing with Jest, Vitest, or Playwright Awareness of web security and privacy best practices What We Offer Competitive compensation and meaningful equity High-ownership role in a fast-growing AI startup Disclaimer : This job posting has been aggregated from external source. Role details, content, and availability are subject to change. Applicants are advised to confirm the latest information directly on the company website before applying.