Sr. Software Engineer (Frontend) - Extensions Team

🏢 About Cerby

Cerby is a security company founded in 2020, backed by leading investors, focused on extending security perimeters to disconnected applications. They provide identity automation and eliminate manual processes, addressing significant blind spots in enterprise security.

🎯 The Role

As a Senior Software Engineer on the Extensions Team at Cerby, you will be responsible for owning and scaling the core browser extension that powers Cerby's platform. This critical component allows users to manage application passwords, autofill credentials, and authenticate via passkeys and federated identity providers across various sites. The role involves developing a cross-browser Manifest V3 product for Chrome, Edge, Firefox, and Safari, with a strong emphasis on security, performance, and user experience. You are also expected to actively integrate AI-assisted tools into your development workflow.

🛠️ Tech Stack

• Core: React, TypeScript
• Styling: Utility-first CSS (e.g., TailwindCSS)
• Browser Extensions: Manifest V3 (service-worker model, content scripts, message passing, cross-browser delivery to Chrome, Edge, Firefox, Safari), Native messaging
• Frontend Fundamentals: Browser API, client-side storage (localStorage, IndexedDB, chrome.storage), networking (fetch/XHR), performance optimization
• APIs: Designing, consuming, and optimizing REST APIs, efficient data-fetching and caching (e.g., TanStack Query)
• Security: Frontend security (XSS, CSRF, CORS, CSP), Modern authentication and identity (OAuth 2.0, OIDC, SAML, SCIM, WebAuthn, FIDO2, passkeys)
• Tooling/Practices: PNPM workspace governance, Testing (unit, integration, component), Observability (metrics, traces, logs; OpenTelemetry/Datadog), Agile/CI-CD

💼 What You'll Do

• Design and develop scalable, high-performance software solutions, leveraging AI-assisted tools.
• Collaborate closely with product managers, engineering managers, UX designers, and other engineers.
• Write clean, maintainable, and efficient code, promoting best practices across the engineering organization.
• Participate in code reviews, share knowledge, and continuously improve development processes.
• Champion new technologies and methodologies, exploring ways to leverage AI for efficiency.
• Proactively identify vulnerabilities and implement robust security solutions, managing frontend dependency risks.
• Collaborate effectively in a remote-first environment.
• Demonstrate leadership, live Cerby’s core values, and foster an environment of experimentation with AI.
• Apply strong analytical and problem-solving skills to deliver high-quality solutions.
• Communicate complex technical concepts clearly and concisely.
• Actively mentor engineers and accelerate documentation using AI.

✅ What You'll Need

• 5+ years of professional software engineering experience, focused on building and scaling SaaS applications.
• Prior experience developing and maintaining Distributed Applications.
• Previous experience mentoring junior developers and conducting security-first code reviews.
• Deep technical expertise in Manifest V3 service-worker model, content scripts, message passing, and cross-browser delivery (Chrome, Edge, Firefox, Safari).
• Proficiency in React and TypeScript with utility-first CSS (e.g., TailwindCSS) for building responsive, accessible UI.
• Strong understanding of core frontend and browser fundamentals, including APIs, client-side storage, networking, and performance optimization.
• Experience designing, consuming, and optimizing REST APIs with efficient data-fetching and caching.
• Solid knowledge of frontend security best practices and modern authentication/identity protocols.
• Experience with testing (unit, integration, component) and observability, owning end-to-end delivery in an Agile/CI-CD environment.

🌟 Nice to Have

• Experience working with security compliance frameworks (SOC 2, GDPR, HIPPA, etc.).
• Familiarity with encryption processes and key management.
• Prior experience in a venture-funded high-growth SaaS startup.