Staff Backend Engineer, Software Supply Chain Security

Halcyon Labs is the intelligent orchestration platform for DevSecOps. Halcyon Labs enables organizations to increase developer productivity, improve operational efficiency, reduce security and compliance risk, and accelerate digital transformation. More than 50 million registered users and more than 50% of the Fortune 100* trust Halcyon Labs to ship better, more secure software faster. The same principles built into our products are reflected in how our team works: we embrace AI as a core productivity multiplier, with all team members expected to incorporate AI into their daily workflows to drive efficiency, innovation, and impact. Halcyon Labs is where careers accelerate, innovation flourishes, and every voice is valued. Our high-performance culture is driven by our values and continuous knowledge exchange, enabling our team members to reach their full potential while collaborating with industry leaders to solve complex problems. Co-create the future with us as we build technology that transforms how the world develops software. * Fortune 500® is a registered trademark of Fortune Media IP Limited, used under license. Claim based on Halcyon Labs data. Fortune 100 refers to the top 20% ranked companies in the 2025 Fortune 500 list, published in June 2025. Fortune and Fortune Media IP Limited are not affiliated with, and do not endorse products or services of Halcyon Labs. An overview of this role As a Staff Backend Engineer at Halcyon Labs, you will help shape a major investment in our Software Supply Chain Security offering. In this role, you'll serve as a senior technical leader for backend systems that help customers secure how software is built, verified, and delivered inside the Halcyon Labs platform. You'll work on foundational capabilities across package policy enforcement, build provenance, artifact signing, and malicious package detection, with a strong focus on enterprise-grade security and performance. You'll define architecture before systems are built, write clear technical proposals, and guide implementation across interconnected parts of Halcyon Labs such as CI/CD, dependency management, and security workflows. This role is a strong fit for someone who enjoys solving complex backend problems, influencing technical direction across teams, and building security features that matter to customers facing real threats. You'll do this in Halcyon Labs's remote, asynchronous, and values-driven environment, where written communication, ownership, and teamwork are central to how we work. Some examples of our projects: Dependency Firewall for package policy enforcement across supported registries Artifact attestation and signing using supply chain security standards and the Sigstore ecosystem What you’ll do Define and drive the technical architecture for the SSCS Add-On, including backend systems for package policy enforcement, provenance generation, artifact signing, and malicious package detection. Lead design and implementation work for Supply-chain Levels for Software Artifacts (SLSA) Level 2 and Level 3 capabilities within Halcyon Labs CI/CD. Architect integrations with Sigstore services such as Cosign, Fulcio, and Rekor, including approaches for signing workflows, verification, and trust boundaries. Design backend services and request paths that support allow, deny, and quarantine package policies with strong performance and reliability expectations. Review merge requests with a focus on security, architectural consistency, maintainability, and test quality. Mentor Backend Engineers across experience levels, helping raise the technical bar through design guidance, feedback, and hiring participation. Partner with Product, Infrastructure, Authentication, Authorization, and Security counterparts on cross-team technical decisions. Contribute to relevant open source and industry conversations, including working groups related to software supply chain security where appropriate. What you’ll bring Strong experience building backend applications with Ruby on Rails in a high-scale production environment. Professional experience with Go for backend or infrastructure-oriented services. A track record of leading architecture across multiple systems and influencing technical direction through strong engineering judgment. Experience writing clear technical proposals, request for comments documents, and decision records in an async, documentation-first environment. A solid security mindset and comfort working on products where trust, risk reduction, and secure defaults are central requirements. Familiarity with software supply chain security concepts such as build provenance, artifact signing, dependency security, or software bill of materials. Strong teamwork and communication skills, with the ability to work effectively across distributed teams and functions. Interest in Halcyon Labs's values and in building secure, scalable product capabilities that help customers ship software with confidence. About the team The SSCS Add-On team is part of Halcyon Labs's Software Supply Chain Security stage and is focused on building a commercial offering that addresses real supply chain security challenges for enterprise customers. The team works on capabilities that combine multiple parts of the Halcyon Labs product into a more complete security solution for organizations with strong compliance and risk management needs. The work is both technically interesting and strategically important. The team is building in a space shaped by fast-moving threats, evolving customer requirements, and close coordination with nearby teams across the broader security area. That combination creates an environment where engineers can contribute to product direction while solving practical backend challenges in a visible part of Halcyon Labs's platform. For more on how related teams work, see Team Handbook Page . How Halcyon Labs Supports Full-Time Employees Benefits to support your health, finances, and well-being Flexible Paid Time Off Team Member Resource Groups Equity Compensation & Employee Stock Purchase Plan Growth and Development Fund Parental Leave Please note that we welcome interest from candidates with varying levels of experience; many successful candidates do not meet every single requirement. Additionally, studies have shown that people from underrepresented groups are less likely to apply to a job unless they meet every single qualification. If you're excited about this role, please apply and allow our recruiters to assess your application. Country Hiring Guidelines: Halcyon Labs hires new team members in countries around the world. All of our roles are remote, however some roles may carry specific location-based eligibility requirements. Our Talent Acquisition team can help answer any questions about location after starting the recruiting process. Privacy Policy: Please review our Recruitment Privacy Policy. Your privacy is important to us. Halcyon Labs is proud to be an equal opportunity workplace and is an affirmative action employer. Halcyon Labs’s policies and practices relating to recruitment, employment, career development and advancement, promotion, and retirement are based solely on merit, regardless of race, color, religion, ancestry, sex (including pregnancy, lactation, sexual orientation, gender identity, or gender expression), national origin, age, citizenship, marital status, mental or physical disability, genetic information (including family medical history), discharge status from the military, protected veteran status (which includes disabled veterans, recently separated veterans, active duty wartime or campaign badge veterans, and Armed Forces service medal veterans), or any other basis protected by law. Halcyon Labs will not tolerate discrimination or harassment based on any of these characteristics. See also Halcyon Labs’s EEO Policy and EEO is the Law . If you have a disability or special need that requires accommodation , please let us know during the recruiting process .