Why This Job is Featured on The SaaS Jobs
This Senior Software Engineer role stands out in SaaS because it sits at the intersection of product experience and security infrastructure. A browser extension is effectively a front line for many SaaS security products, operating where users interact with web applications and where sensitive data can be created, moved, or exfiltrated. Building on Manifest V3 across major browsers also places the work inside a rapidly evolving platform ecosystem where capabilities and constraints change frequently.
From a SaaS career perspective, the role offers durable exposure to the mechanics of shipping security-sensitive functionality at scale: reliable client-side delivery, performance tuning across heterogeneous environments, and secure communication with backend services. The cross-team integration with endpoint agent and backend groups reflects a common SaaS pattern where value depends on cohesive behavior across multiple surfaces, which is transferable to other platform and security product domains.
This position is best suited to an engineer who prefers ownership over a well-defined product surface and enjoys balancing UX-adjacent concerns with defensive engineering. It aligns with professionals who like working across boundaries, staying current with platform standards, and treating security as a design constraint rather than an afterthought.
The section above is editorial commentary from The SaaS Jobs, provided to help SaaS professionals understand the role in a broader industry context.
Job Description
About the Role
Cyberhaven is redefining data security by understanding how data flows across organizations. Our browser extension is a critical component of this vision, enabling visibility and control at the point where users interact with web applications. We’re looking for an experienced engineer to help build and enhance our extension, ensuring it’s secure, performant, and deeply integrated with our platform. You’ll join our Browser Extension team and collaborate closely with both the endpoint agent and backend teams to deliver a seamless experience across devices and environments.
What You’ll Do
Design, build, and maintain a robust browser extension for Chrome, Edge, and other major browsers using Manifest V3 and modern APIs.
Implement features that securely interact with web content and backend services, ensuring compliance with security best practices.
Optimize performance and reliability across diverse environments and user workflows.
Work closely with the endpoint agent and backend teams to ensure tight integration and consistent functionality across endpoints and services.
Stay ahead of evolving browser APIs, security standards, and extension ecosystem changes.
Participate in code reviews, testing, and continuous improvement of development processes.
Who You Are
5+ years of software engineering experience, with at least 3 years focused on browser extension development.
Strong proficiency in JavaScript/TypeScript, HTML/CSS, and modern web technologies.
Deep understanding of browser extension APIs (Chrome Extensions, Manifest V3, etc.) and security implications of interacting with web content.
Experience with secure coding practices and handling untrusted data.
Bonus:
Background in security tools, SaaS products, or endpoint technologies.
Knowledge of Go for backend integration.
Excellent communication skills and ability to work cross-functionally with product, design, and backend teams
Joining Cyberhaven is a chance to revolutionize data security. Traditional tools fall short, but we’ve reimagined protection with AI-enabled data lineage that analyzes billions of workflows to understand data, detect risk, and stop threats. Backed by $250M from leading investors like Khosla and Redpoint, our team includes leaders who built industry-defining technologies at CrowdStrike, Palo Alto Networks, Meta, Google, and more. This role lets you shape the future of data security, alongside experts driven to help customers protect their most valuable information.
Cyberhaven is committed to creating a diverse environment and is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status.
