backend developer in offensive security

Hadrian is an offensive cybersecurity startup developing an autonomous Threat Exposure Management platform powered by agentic AI. The platform maps organizations’ digital footprints, discovers risks, and prioritizes remediation to help security teams harden external attack surfaces.

• Develop and maintain event-driven components that orchestrate and execute core offensive security strategies;
• Translate offensive security strategies into robust, high-quality code;
• Architect and deploy backend services powering Agentic AI capabilities and multi-step exploit validation;
• Write low-level, high-concurrency tools in Go and Python while maintaining robust, scalable APIs;
• Design data pipelines for massive internet-wide reconnaissance data using Apache Kafka and Kubernetes/KNative;
• Shape architectural decisions and align technical strategies with business goals;
• Build an innovative platform operating at internet-wide scale.

• Have 4+ years of experience building large-scale distributed systems, features, or applications;
• Be proficient in GoLang, Python, C#, or similar technologies;
• Have experience working with PostgreSQL;
• Have a background in cybersecurity;
• Use AI pragmatically to accelerate development workflows;
• Have exceptional problem-solving abilities and the grit to investigate and resolve deep-seated production bottlenecks;
• Enjoy solving complex scalability and performance challenges in distributed environments;
• Communicate clearly, bridging technical complexity and product mission;
• Share the company’s values and work in accordance with them;
• Have a track record of building systems that perform under extreme load;
• Have deep experience with database scaling, especially PostgreSQL and Neo4j;
• Nice to have: Experience in DevOps / DevSecOps environments using Kubernetes, Knative, or Kafka; hands-on experience with Agentic AI frameworks or autonomous agents; experience with Python and TypeScript; contributions to open source projects.

• Unlimited paid holiday;
• Stock options package;
• Mobile phone stipend;
• Work-from-home budget;
• Business travel card;
• Swapfiets;
• Referral bonuses;
• Background check is part of the hiring process.