Horizon3.ai jobs

Senior Software Engineer, Browser Automation role at Horizon3.ai (remote, cybersecurity) building and hardening the browser automation and crawling engine for autonomous pentests. Responsibilities include advancing browser-driven crawlers using Playwright and Stagehand, tackling modern web app complexity (SPAs, authentication, anti-bot defenses), improving coverage/determinism/throughput, and applying LLM-driven navigation surgically. Requires expertise in browser automation, web crawling, authentication flows, and deterministic system design. 100% remote, fully distributed team.

Senior Software Engineer, Agentic Systems role at Horizon3.ai (remote, cybersecurity) building autonomous web application penetration testing agents. Responsibilities include architecting the agent harness/orchestration layer that turns LLMs into reliable autonomous pentesters, designing tools for probing/exploiting, translating offensive expertise into agent capabilities, and building evaluation infrastructure. Requires expertise in building reliable autonomous systems, agent orchestration, LLM integration (deterministic-first approach), and strong software engineering fundamentals. 100% remote, fully distributed team.

Senior Revenue Operations Coordinator at Horizon3.ai (cybersecurity SaaS, EMEA region) responsible for order management, deal desk operations, EMEA compliance (GDPR, VAT, regional discount thresholds), finance/provisioning coordination, CRM maintenance, and sales enablement. Requires 3–5 years experience, reports to US-based Global Deal Desk manager, requires work in Amsterdam/London timezone. Emphasizes deal desk operations, order processing, compliance, and cross-functional coordination rather than strategic RevOps architecture or technology strategy.