Horizon3.ai is hiring a Software Architect, Security Platform to lead the technical architecture and design of our next-generation autonomous security platform. You will architect cloud-native systems that enable continuous, automated security operations, supporting our mission to make proactive offense-informs-defense capabilities accessible to organizations of all sizes.
What You'll Do
- Lead architectural decisions for security platform modules spanning multiple security domains.
- Design cloud-native, multi-tenant architecture supporting customers from SMB through enterprise.
- Architect integration frameworks that embed seamlessly into existing customer security infrastructure.
- Define technical standards and patterns for production-safe automation in security-critical environments.
- Design scalable data pipelines that process security findings and orchestrate automated responses.
- Architect event-driven systems that coordinate security testing and defensive capabilities.
- Build robust API and integration layers supporting extensive security tool integrations.
- Design fault-tolerant systems with comprehensive audit trails and rollback capabilities.
- Partner with product managers to translate platform vision into technical roadmaps.
- Collaborate with security engineers to design systems that leverage security intelligence.
- Work with domain specialists to architect security-specific capabilities.
- Guide engineering teams on implementation of architectural decisions.
- Mentor engineering teams on cloud-native design patterns and security automation best practices.
- Establish engineering standards for security, scalability, and reliability.
- Lead technical reviews and architecture decision records (ADRs).
- Drive technical strategy discussions with leadership team.
What We're Looking For
- 8+ years of software engineering experience.
- 4+ years in senior architecture roles.
- Expert-level AWS knowledge: Deep experience architecting applications in AWS environments.
- Proven experience designing microservices, event-driven architectures, and serverless applications at scale.
- Strong background in RESTful APIs, webhooks, and complex third-party integrations.
- Experience with real-time data processing, streaming architectures, and data pipeline design.
- Track record of leading technical architecture for enterprise software products.
- Experience scaling systems from startup to enterprise-grade requirements.
- Strong background in designing secure, compliant systems handling sensitive data.
- Experience with infrastructure-as-code and CI/CD practices.
- Understanding of cybersecurity markets and enterprise software requirements.
- Experience building products that integrate with existing enterprise toolchains.
- Ability to balance technical excellence with business requirements and delivery timelines.
Nice to Have
- Previous experience in cybersecurity, security tooling, or compliance software.
- Understanding of enterprise security operations and incident response.
- Familiarity with security frameworks and compliance requirements.
- Experience with security tool APIs and integration patterns.
- Background in automation platforms, workflow engines, or security orchestration.
- Knowledge of security tools and enterprise management systems.
- Experience with observability and monitoring in distributed systems.
- Background at high-growth B2B SaaS companies.
- Experience building products for technical practitioners.
- Previous work on products with complex integration requirements.
Technical Stack
- AWS
Benefits & Compensation
- Compensation: $207,000 - $295,000 annually + equity (stock options).
- Health, vision & dental care for you and your family.
- Flexible vacation policy.
- Generous parental leave.
Work Mode
This role supports a global work mode.
Horizon3 is not just an equal opportunity employer - we are a community that values diversity, equity, and inclusion as fundamental principles of our culture and success. We are dedicated to fostering a workplace where everyone feels welcome and respected, regardless of race, color, religion, sex, national origin, age, disability, veteran status, sexual orientation, gender identity or expression, genetic information, marital status, or any other legally protected status by law.
