Senior Engineer- Frontend

Censys

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Location: United States, Canada
Job Type: full-time
Work Format: 🌍 Remote
Salary: $174,000 USD - $206,000 USD
Posted: July 24, 2026

Job Description

Company Background

Censys’ mission is to be the one place to understand everything on the internet. Frustrated by the lack of trustworthy Internet intelligence, we set out to create the industry’s most comprehensive, accurate, and up-to-date map of the Internet. Today, Censys delivers real-time Internet intelligence and actionable threat insights to global governments, over 50% of the Fortune 500, and leading threat intelligence providers worldwide.

Location:

This position is remote within the United States or Canada.

Role Summary

We're hiring a Senior Engineer I to own significant portions of the frontend of the Censys Platform on the Core Services team. You'll be driving epic-scale work across account and integration management, user settings and controls, as well as the new product surfaces that bring Censys intelligence to life for analysts and security professionals worldwide. Working in close partnership with Design and Product to set direction, you’ll make architectural decisions, and ship high-quality experiences that enterprise customers depend on daily. Our stack is Remix and React with a rich TypeScript ecosystem, and we hold a high bar for testing discipline, accessibility, and long-term maintainability.

What You'll Do

Drive large frontend projects for enterprise account management, third party integrations, and the larger Censys Platform.
Surface new data types and product capabilities through well-architected, accessible UI
Partner closely with Design as a peer, translating their intent faithfully, while working to maintain quality and performance.
Work with Product to clarify requirements, negotiate scope, and keep epics moving forward
Provide an example of frontend quality for the team: testing standards, accessibility requirements, and component architecture decisions
Mentor engineers on frontend best practices and help shape how the team approaches frontend work at scale

What You'll Bring

5+ years of software engineering experience with strong depth in React and TypeScript
Proven ability to drive epic-level frontend work end-to-end
Strong testing discipline: unit, integration, and end-to-end coverage
Solid accessibility fundamentals: WCAG standards, semantic HTML, keyboard navigation, and screen reader compatibility
System-level thinking for frontend: component architecture, state management, data-fetching patterns, and performance tradeoffs
Collaborative approach to working with Design and Product on future projects
Strong opinions loosely held

What Sets You Apart

Experience building or contributing to a shared component library or design system
Familiarity with backend APIs — you can read service contracts, have an informed conversation with backend engineers, and understand what's feasible
Experience with Remix or other server-rendered React frameworks
Security domain experience or genuine interest in the security intelligence space
Data visualization or complex table/grid UI work at scale

For high cost of living areas (San Francisco Bay, New York City, and Seattle), the expected salary range for this position is $174,000 USD - $206,000 USD, plus bonus eligibility and equity.

For all other locations, the expected salary range for this position is $151,000 USD - $191,000 USD, plus bonus eligibility and equity.

Job level and actual compensation will be decided based on factors including, but not limited to, individual qualifications objectively assessed during the interview process (including skills and prior relevant experience, potential impact, and scope of role), market demands, and specific work location. The listed range is a guideline, and the range for this role may be modified. For roles that are available to be filled remotely, the pay range is localized according to employee work location by a factor of between 83% and 100% of range. Please discuss your specific work location with your recruiter for more information.

Censys offers a competitive benefits package to employees, including equity, health, dental & vision coverage, retirement with company contribution, parental leave, mental health & wellness benefits, flexible PTO, and a professional development stipend. Censys also offers sales incentive pay for most sales roles and an annual bonus plan for eligible non-sales roles. Censys’s compensation and benefits are subject to change and may be modified in the future. Please see our careers page for more details.

We will work to ensure individuals with disabilities are provided reasonable accommodation to apply for a role, participate in the interview process, perform essential job functions, and receive other benefits and privileges of employment. If you require accommodation, please reach out to your recruiter. These modifications enable an individual with a disability to have an equal opportunity not only to get a job, but successfully perform their job tasks to the same extent as people without disabilities.

To ensure the integrity of our hiring process and facilitate a more personal connection, we require all candidates to keep their cameras on during video interviews. Additionally, if hired, we would love to bring you to our HQ in Ann Arbor for in-person onboarding.

By applying for this job, the candidate acknowledges and agrees that any personal data contained in their application or supporting materials will be processed in accordance with our Censys Privacy Policy.

Our roots are in Ann Arbor, Michigan and our innovation is fueled by the team’s global perspectives. For this role, we are open to remote employees across the continental US. We value diversity and are committed to creating an inclusive environment for all employees. Censys is an equal opportunity employer.

Note to external recruiters/agencies: We are not currently engaging with third-party agencies for this role and will not accept unsolicited outreach. We kindly ask that you do not submit resumes or candidate profiles to our team.

California Privacy Rights Notice

Pursuant to the California Consumer Privacy Act (CCPA), we are providing you with notice that we collect personal information from job applicants for business purposes, including evaluating your candidacy for employment, conducting interviews, and, if applicable, completing the hiring process. The categories of information we may collect include identifiers (such as name and contact information), professional or employment-related information (such as work history, education, and references), and other information you provide in your application. We do not sell or share your personal information. For more information on how we use and protect your personal information, and your rights under the CCPA, please refer to our Privacy Policy.

🎯 Who is this job for?

Senior frontend engineers with 5+ years of software development experience and deep expertise in React and TypeScript are best suited for this role. They should be skilled in frontend architecture, state management, data fetching, performance optimization, accessibility, automated testing, and ideally shared component libraries, server-rendered React, APIs, data visualization, or security platforms. The candidate should be comfortable leading large enterprise frontend projects end to end, collaborating with Design and Product, building complex interfaces, making architectural decisions, and mentoring other engineers.

💬 Potential Interview Questions

How would you structure a large React and TypeScript frontend for account management and third-party integrations?

I would organize the application by business domains and shared capabilities, using feature-level modules, typed API clients, reusable components, and clear boundaries between presentation, server data, and client state. This keeps epic-scale work maintainable while allowing teams to evolve features independently.

How would you use Remix’s data-loading and mutation patterns in an enterprise application?

I would use route loaders for server-side data required to render a page and actions for validated mutations, keeping authorization and sensitive operations on the server. Nested routes can provide granular loading, error handling, and revalidation while reducing unnecessary client-side state.

How do you decide whether state belongs in React component state, a shared store, or server data management?

Local state should handle ephemeral UI concerns, while URL state is appropriate for shareable filters and navigation. Server-owned data should remain managed through loaders or a data-fetching layer, and a shared store should be reserved for genuinely cross-cutting client state to avoid synchronization problems.

What testing strategy would you apply to a critical frontend feature?

I would combine unit tests for isolated logic and components, integration tests for workflows and API boundaries, and end-to-end tests for high-value user journeys such as managing integrations or permissions. Tests should emphasize behavior and accessibility rather than implementation details.

How would you ensure a React application meets accessibility requirements?

I would start with semantic HTML, correct labeling, logical heading structure, visible focus states, keyboard-operable controls, and appropriate error messaging. I would validate with automated tools such as axe, keyboard testing, and manual screen-reader checks against relevant WCAG criteria.

How would you design a shared component library or design system for multiple product surfaces?

I would establish accessible primitives, consistent design tokens, documented component APIs, and visual and interaction states that cover real product use cases. Components should be composable and versioned carefully, with automated tests and usage guidance to prevent inconsistent implementations.

How would you optimize performance for complex tables or data-heavy security interfaces?

I would measure first, then apply techniques such as server-side filtering and pagination, virtualization, memoization, selective rendering, and efficient data serialization. I would also consider progressive loading and route-level code splitting so the initial interface remains responsive.

How do you handle API contracts and failures when integrating frontend features with backend services?

I would clarify schemas, authentication, authorization, pagination, error formats, and consistency guarantees with backend engineers, then represent the contract with generated or explicitly maintained TypeScript types. The UI should provide resilient loading, empty, retry, and actionable error states without exposing sensitive implementation details.

How would you build an accessible and maintainable filtering experience for Internet intelligence data?

I would model filters as typed URL state so queries are bookmarkable and shareable, provide clear labels and removable filter tokens, and preserve keyboard and screen-reader usability. The backend query model should be reflected in a predictable UI while preventing invalid or excessively expensive requests.

How would you approach mentoring engineers and making frontend architectural decisions at scale?

I would document principles and tradeoffs, use design reviews and focused code reviews, and provide reusable examples rather than prescribing every implementation. I prefer strong default patterns while remaining open to alternatives when new evidence, product needs, or performance data justify them.

📋 Job Summary

Censys is an internet intelligence company helping governments, Fortune 500 organizations, and security teams understand the global internet. As a Senior Frontend Engineer, you’ll lead large-scale work across account management, integrations, user settings, and analyst-facing product experiences while partnering with Design and Product. Build with React, Remix, TypeScript, and modern testing, accessibility, component architecture, and data-fetching practices. This role is fully remote across the United States and Canada, with a salary of $151,000–$191,000 outside major high-cost areas or $174,000–$206,000 in San Francisco, New York City, and Seattle, plus bonus eligibility and equity—an exciting opportunity to shape security products used by leading global organizations.