Staff, Security Engineer

We're looking for a Staff Security Engineer to join Fullscript's Security Engineering team as a senior technical leader and hands-on builder. This role is ideal for someone who started their career in software engineering and developed deep expertise in security engineering, application security, or product security.

You'll work closely with engineering teams to design and implement security solutions that scale across Fullscript's products and platforms. As a Staff-level engineer, you'll own complex technical initiatives, help shape security strategy, and influence how security is built into the software development lifecycle. You'll be expected to balance hands-on execution with technical leadership, mentoring engineers and helping teams solve security challenges in a way that supports both business objectives and engineering velocity.

We're looking for someone who has owned systems end-to-end; from application development and infrastructure decisions through security design and implementation; Understands how to build secure, scalable solutions in production environments. The ideal candidate is deeply technical, highly collaborative, and energized by solving difficult problems that span multiple teams, systems, and domains.

• Lead the design and implementation of security solutions across Fullscript's applications, platforms, and AI-powered systems.
• Partner with engineering teams to embed security throughout the software development lifecycle, including architecture reviews, threat modeling, secure coding practices, and design reviews.
• Drive application security, product security, and vulnerability management initiatives from concept through implementation.
• Own complex security challenges that span multiple teams, balancing technical requirements, business priorities, and engineering constraints to deliver scalable solutions.
• Mentor engineers and security practitioners, raising the bar for secure software development and helping teams make sound security decisions.
• Influence technical strategy and security standards through hands-on engineering, technical leadership, and cross-functional collaboration.
• Stay ahead of emerging threats, security technologies, and AI-specific risks to help shape Fullscript's long-term security posture.

• Experience securing Ruby on Rails, Node.js, JavaScript, GraphQL, or similar application ecosystems.
• Experience with AWS cloud security and cloud-native security controls.
• Experience with threat modeling methodologies such as STRIDE, PASTA, or similar frameworks.
• Experience with vulnerability management, application security posture management, or developer security tooling.
• Familiarity with GitHub, GitLab, Wiz, static analysis tools, secret scanning, or related security platforms.
• Experience conducting penetration testing, security research, or ethical hacking activities.
• Experience protecting healthcare, regulated, or sensitive customer data.

• Remote-first flexibility to work where you work best, with North America (Ottawa, Toronto, or Calgary) preferred for this role.
• Flexible PTO and competitive pay, because work-life balance matters
• RRSP/401k match and stock options to invest in your future
• Premium benefits package with customizable coverage, paramedical services, and an HSA.
• Fullscript discounts to save on high-quality wellness products
• Continuous learning opportunities to grow your skills and career