Senior Security Engineer

We are seeking a Senior Product Security Engineer to join our growing security team. This role will be critical in ensuring the security of our products across the entire software development lifecycle (SDLC) and provide support on different security initiatives. You will work closely with engineering, product, and operations teams to embed security best practices from design through to deployment. You will play a critical role in shaping our security posture, embedding security into our development lifecycle, and protecting our customers' data.

Technologies we use:

• Backend: Node.js, Kotlin, Java, Go
• Frontend: React, Redux, Swift, Kotlin
• REST, gRPC, graphQL
• AWS
• MySQL, DynamoDB, Redis
• Kubernetes, Ambassador, Helm, Rancher

What you will be doing:

• Support in executing a comprehensive product security strategy that aligns with the company's goals and risk appetite.
• You will work hands on across code, infrastructure, and CI/CD to create agents, services and pipelines that detect, prevent and remediate risks leveraging AI where it adds value.
• Design, build and operate security automation for the SDLC (code scanning, dependency risk management, secrets detection, policy-as-code) integrated into CI/CD.
• Perform Manual Design and Implementation Reviews of Greenlight products and services from a security perspective.
• Establish and enforce secure development standards (i.e. API security, Security patterns, IaC, etc.) and best practices across the organization.
• Serve as SME on the practical security of our AI and LLM ecosystem. Lead threat modeling exercises for novel AI systems applying advanced security and privacy best practices.
• Leverage automations and tools to continuously test, fuzz and validate products and platform components for security issues.
• Perform Penetration testing and retesting to validate fixes.
• Responsible for triaging findings from security researchers and leading incident response for PSIRT.
• OnCall support for incident response and lead product-related security events and vulnerabilities.
• Partner with engineering, product, and platform teams to embed security by design patterns, drive threat modeling and land pragmatic guardrails that unblock developers.
• Provide guidance and education to developers that help prevent the authoring of vulnerabilities.
• Partner closely with engineering, product, and platform teams to prioritize and remediate security vulnerabilities in a timely and efficient manner.
• Develop and maintain software supply chain protections including SBOM generation/verification, artifact signing/attestation, and provenance enforcement.
• Build automation for static and dynamic analysis and frameworks that enable Greenlight to scale consistently across all our products.
• Use data and telemetry to measure control effectiveness, build dashboards and alerts that turn signals into action.
• Document runbacks and API, mentor engineers and champion secure engineering practices.
• Foster a culture of security awareness and ownership across the Engineering and Product organizations.
• Stay current with the latest security threats, vulnerabilities, and industry best practices to continuously evolve our security controls and processes.

What you should bring

• 5+ years of experience finding security vulnerabilities, security code reviews and knowledge of secure code development for the technology stack at Greenlight.
• 2-4 years experience with the threat modeling process and ability to find design problems based on technical architecture and data flow diagrams.
• Experience with exploiting common security vulnerabilities
• Deep technical knowledge of web and mobile application security, common vulnerabilities, secure coding practices, common exploit mitigations and secure architecture patterns.
• Experience integrating or building AI-powered tools to assist with vulnerability detection, code review or threat modeling.
• Experience creating software that enables security processes especially those leveraging AI/ML for automation or augmentation.
• End to end experience on implementing and managing tools for Product Security (i.e. API Security, Mobile Protection, SAST, runtime scanning, etc.)
• Experience with software development and automation that enables security processes. Deep technical knowledge of CI/CD pipelines and relevant tools for web and mobile applications.
• Hands-on experience with security tools for SAST, DAST, IAST, and penetration testing. Fuzzing skills are good to have.
• Skilled in scripting, automation and exploit writing.
• Strong understanding of cloud security principles in AWS environments.
• Strong communication skills with the ability to articulate complex security concepts to both technical and non-technical audiences.
• Strong product sense for rapid iteration and refinement based on data, combined with a collaborative mindset to work closely with engineers, product managers, and security analysts in a fast-paced environment.

Nice to have:

• Strong at abstraction turning bespoke engagements into reusable patterns and reference implementation.
• Security assessment of IoT hardware/firmware
• Contribution to security community including public research, bug bounty, presentations, blogs, etc
• Experience at Fintech or similar regulated companies
• Startup Agility and stay curious mindset