Senior Security Platform Engineer

The Senior Security Platform Engineer leads the design and operation of core infrastructure that supports security detection, observability, and response at Lumin Digital. In this role, you will architect secure and scalable systems, mentor peers, and partner across engineering teams to promote secure-by-default development and operational patterns. This role blends deep technical expertise with strategic ownership of security systems, with a focus on reliability, automation, and influencing broader engineering practices through thought leadership and mentorship.

Essential Functions
Architect multi-region and multi-account telemetry systems that support ingestion, storage, and analysis of security-relevant data at scale.
Define and enforce the separation of duties and access controls in CI/CD and infrastructure provisioning workflows.
Lead the design and rollout of policy-as-code frameworks and pipeline guardrails to improve deployment security across teams.
Set service-level objectives (SLOs) for security services and lead capacity planning, monitoring strategy, and performance optimization.
Guide incident response for complex or high-severity issues, including technical leadership during resolution and facilitating post-incident reviews.
Mentor engineers across the organization in secure platform practices and review contributions for architectural integrity and security posture.
Drive initiatives that embed security into developer workflows (e.g., secure ephemeral environments, secrets management, test isolation).
Collaborate with platform and product leadership to influence roadmaps and align engineering efforts with long-term security objectives.

Position Specifications

Education:
Bachelor’s degree in Computer Science, Information Security, or related field; or equivalent self-directed study with demonstrated competency in security operations, cloud engineering, or platform reliability required.

Experience:
Six (6) or more years of professional experience in security engineering, platform reliability, or cloud infrastructure.
Experience designing and leading large-scale secure systems in cloud-native environments (AWS preferred).
Proven track record of mentoring engineers, leading initiatives, and driving improvements to reliability and security posture across organizations.

Knowledge, Skills, and Abilities:
Advanced knowledge of cloud security best practices, including the requirements and guidance from security and compliance frameworks, such as SOC 2 Trust Services Criteria, PCI Data Security Standard, the CIS Benchmarks, and the AWS Well-Architected Framework.
Advanced knowledge of security best practices for Kubernetes, CI/CD, AWS, and cloud-native systems.
Expertise with infrastructure-as-code tools (e.g., Terraform) and pipeline automation for secure deployments.
Excellent troubleshooting, incident management, and monitoring skills across distributed systems.
Strong communication and collaboration abilities, with a focus on mentorship and cross-team influence.
Ability to influence engineering practices and advocate for security priorities in roadmap discussions.
Must be able to pass requisite background checks to access sensitive information.

LIFE AT LUMIN DIGITAL

Lumin Digital is a trailblazer in digital banking solutions, driven by a unique approach to technology, service, and people. We empower credit unions and banks by creating cutting-edge digital experiences that continuously serve, engage, and grow their membership base. Lumin is 100% cloud-native, purpose-built to unlock the full advantages of the cloud for financial institutions and their users.

At Lumin, we thrive on curiosity and innovation. Our culture fosters trust - in our expertise and decisions, respect - for diverse perspectives and talents, and boldness - in pursuing innovative paths. These values guide us, shaping a workplace where collaboration thrives, ideas flourish, and new possibilities are discovered. Focused on continuous improvement and innovation, we encourage our team to explore, experiment, and put new ideas into action, challenging the usual way of doing things.

Lumin Digital is an equal opportunity employer. We consider all qualified applicants without regard to race, color, religion, sex, national origin, disability, protected veteran status, sexual orientation, gender identity, or any other legally protected basis, in accordance with applicable law.

For more information, visit lumindigital.com.