XBOW jobs

XBOW is hiring a Software Engineer - Platform / Core Infrastructure to design and build the distributed systems powering their AI-driven vulnerability discovery platform. You'll architect scalable infrastructure across multiple cloud providers (AWS, Azure, OCI) and deployment contexts (SaaS, on-prem), working with TypeScript, Kotlin, and Go to optimize performance, reliability, and observability. The role requires strong experience with distributed systems, Kubernetes/Docker, infrastructure-as-code, event-driven architectures, and cloud performance tuning, plus comfort navigating ambiguity in a startup environment. XBOW is backed by Sequoia and Altimeter, founded by the creator of GitHub Copilot, and has already achieved #1 on HackerOne's leaderboard with zero-day discoveries. The position is fully remote in the US or EMEA with competitive salary and generous equity, though you'll be expected to travel regularly for in-person collaboration; the hiring process includes a pair programming session and spans four rounds.

XBOW is hiring a Software Engineer to build LLM-powered systems for their AI-driven offensive security platform, working within the AI and Engineering teams. You'll design prompt flows, orchestration layers, and evaluation frameworks that coordinate large language models with real-world vulnerability discovery and exploitation tasks, primarily in TypeScript. Required skills include strong experience building production software around LLMs (prompting, agentic orchestration, fault tolerance), solid software engineering fundamentals, TypeScript proficiency, and an MSc or equivalent in computer science, math, physics, or machine learning. Founded by Oege de Moor (GitHub Copilot creator) and backed by Sequoia and Altimeter, XBOW has already uncovered thousands of zero-days and ranks #1 on HackerOne's leaderboard in just over a year. The role is fully remote with competitive salary and generous equity, though the stand-out detail is the technical depth required—this is a research-driven position mixing startup pace with lab-like curiosity, not a standard engineering role.

XBOW is hiring a Software Engineer for Platform/Core Infrastructure to build the distributed systems powering their AI-driven vulnerability discovery platform. You'll design and operate scalable cloud infrastructure across AWS, Azure, and OCI, develop core services in TypeScript, Kotlin, and Go, and optimize systems for performance, reliability, and multi-environment deployment (SaaS and on-prem). Required experience includes building distributed systems on cloud platforms, Docker/Kubernetes, infrastructure-as-code tools, event-driven architectures, and strong performance-tuning skills across cloud services and databases. Founded by Oege de Moor (GitHub Copilot creator) and backed by Sequoia and Altimeter, XBOW has discovered thousands of zero-days in under a year and ranks #1 on HackerOne's leaderboard. The role is full-time and remote across the US or EMEA with competitive salary and generous equity. Key standout: this is an early-stage deep-tech startup tackling AI-powered offensive security with world-class researchers and investors, offering high autonomy and the chance to shape both the product and how the engineering function scales.

XBOW is hiring a Software Engineer to build full-stack systems for their AI-powered offensive security platform, joining a small team shipping quickly across React frontends, TypeScript/Kotlin/Go backends, and AWS infrastructure. You'll design and implement end-to-end features, own problems from design through production, and collaborate with AI researchers and security experts to make powerful capabilities accessible to organizations. Required experience includes full-stack system building, TypeScript proficiency, API design/consumption, and strong backend development in languages like Node.js, Kotlin, or Go, plus comfort with ambiguity and fast-paced startup environments. Founded by GitHub Copilot creator Oege de Moor and backed by Sequoia and Altimeter, XBOW has already uncovered thousands of zero-days and ranks #1 on HackerOne's leaderboard in just over a year. The role is fully remote with competitive salary and generous equity, though the company emphasizes mission fit and capability over seniority titles. Notable stand-out: this is a rare opportunity to work directly on cutting-edge AI applied to offensive security at a well-funded startup with legendary security researchers.