Research Engineer / Software Engineer (frontend)

About XBOW

At XBOW, we’re redefining the future of cybersecurity by building the world's first autonomous pentester, powered by AI. Today, the gold standard for securing software systems is human pentesters, but with the rise of artificial intelligence, we’re stepping up to scale offensive security to meet the ever-growing demand.

AI is transforming the landscape of both cybersecurity and cyberattacks. While millions of people without security expertise are creating software, bad actors are using AI to launch more effective attacks. XBOW fights back with AI-driven superpowers, enabling security teams to stay one step ahead. Our autonomous AI solves 75% of web app security benchmarks with zero human intervention—and at superhuman speed.

What makes XBOW truly unique? Like human experts, it forges creative attacks, adapts its learnings, and continuously works to find vulnerabilities faster than anyone ever could. We’re not only simulating threats—we’re also finding and responsibly disclosing real-world vulnerabilities, ensuring organizations can fix issues before they’re exploited. XBOW isn’t just a tool; it’s a transformative force in the secure development lifecycle.

Backed by Sequoia Capital and a team that includes the creators of GitHub Copilot and GitHub Advanced Security, XBOW is not just keeping up with the times—we’re shaping the future of cybersecurity. Our mission is simple: to defeat the bad actors before they strike, using AI to revolutionize how we approach offensive security.

We’re building something thatmust be built, and we’re the team to do it. Join us in shaping the next frontier of autonomous security.

Your Role: Research Engineer (frontend)

We’re looking for aFrontend Research Engineer who’s passionate about building great developer experiences and products. In this role, you’ll design and build core parts of our frontend inReact andTypeScript, creating fast, intuitive UIs tailored for technical users. You’ll collaborate closely with backend engineers and product, apply a strong design mindset to UX challenges, and contribute to our architecture, design system, and tooling. You’ll be joining a small, senior team working at the intersection of AI, cybersecurity, and developer experience—where your decisions will shape the product, the codebase, and how XBOW is used from day one. We move fast, trust each other deeply, and care a lot about building with purpose.

What You'll Do

• Design and build frontend components inReact withTypeScript, tailored for developers and security teams

• Apply a strongdesign mindset to create UX that feels seamless, intentional, and built for flow

• Implement scalable UI patterns that support rapid iteration and long-term maintainability

• Navigate ambiguity and help definehow we build as much aswhat we build

• Ship fast and often—balancing speed with thoughtful UX to get great features in front of users quickly.

• Collaborate closely with other team members to build for scale and user experience

• Bring empathy to performance, accessibility, and usability for technical users

• Contribute to our design system and improve frontend tooling

Who You Are

• Strong experience building modern web apps and product interfaces usingReact andTypeScript

• A product mindset: someone who thinks in flows, not just components

• Embrace fast iteration cycles—prototype, test, and ship quickly to learn what matters and build momentum.

• You’re comfortable implementing APIs and navigating data structures—whether it’s wiring up a new endpoint or diagnosing tricky integration issues

• Strong problem-solving skills and the ability to work with incomplete information

• Adesign sensibility: you appreciate the details, understand UX tradeoffs, and care about polish (but not at the expense of shipping!)

• Experience building for technical users, especially engineers and security teams

• Familiarity with design systems and modern UI/UX patterns

• Comfort working in a fast-paced, early-stage startup environment

Bonus Points

• Experience with realtime data, authentication/authorization flows, or developer tooling

• Previous startup experience

What We Offer

• Compensation & Equity: Competitive salary and a generous equity package, making you a true owner of the company.

• Career Growth: Shape your role, lead the function, and grow with the company as we redefine cybersecurity.

• Meaningful Work: You will tackle technically complex challenges and play a pivotal role in the growth of our business, working alongside an amazing team and some of the world’s experts to shape how AI transforms cybersecurity.

What Else You Should Know

• Location: Remote (all team members are remote but we meet regularly and you’re supported to travel to collaborate with colleagues in person)

• Contract: Full-time.

• Hiring Process:

  1. 30-min introductory chat.

  2. 30 minutes with one of our founders.

  3. 2-3 hour technical deep dive around relevant case study.

  4. 30-min final meeting with our CEO and founder, Oege de Moor.

We don’t use seniority titles at XBOW—so if you’re worried about “leveling,” don’t be. We care a lot more about mission fit, capability, and impact than what’s on your LinkedIn headline.

We believe in people who are driven by curiosity and a willingness to learn. Even if you don't check every box, we encourage you to apply if you're excited about the role and our mission.