Research and reproduce high-consequence vulnerabilities across enterprise networks, applications, identity systems, and cloud environments.
Turn vulnerability research and attacker tradecraft into safe, repeatable automated attack capabilities.
Validate remediation and collaborate with research, product, and engineering teams.
Horizon3 is a fast-growing remote cybersecurity company that helps organizations proactively find, fix, and verify exploitable attack vectors. Its NodeZero platform delivers autonomous pentests, and the team is a collaborative culture committed to respect, ownership, and results.
Lead the technical direction of a vulnerability intelligence practice, setting standards for validation and communication.
Research and validate newly disclosed vulnerabilities, including testing proof-of-concept exploits in isolated environments.
Build honeypots, detection methods, and automation to monitor real-world exploitation and deliver actionable intelligence.
They are a cybersecurity intelligence company focused on vulnerability research and real-world risk assessment. They are a remote-friendly international team with a collaborative culture built on openness, inclusion, integrity, and continuous learning.
Conduct advanced security research across application and AI security surfaces to uncover novel, systemic, and chained vulnerabilities.
Perform hands-on penetration testing, exploit development, and build security tooling to scale discovery.
Mentor researchers, shape security strategy, and share findings with the broader community.
The company is focused on securing AI-powered DevSecOps and modern software development environments. It is a remote-first organization with a collaborative culture, emphasizing technical excellence, inclusivity, and continuous learning.