Software Engineer, Resilience

About the role

This isn't just another engineering role. This is a unique opportunity to be a founding member of our new Resilience Engineering function and shape the future of performance and scalability at Persona. As our products grow in complexity and adoption, we're building a specialized team to act as a force multiplier for all of engineering. You won't own a single service; instead, you'll be a trusted partner embedded within product teams, tackling their most critical challenges in performance, scalability, and observability. We’re looking for someone who is a systems thinker, part detective, part diplomat, and part architect, and who’s ready to help build a new function from the ground up.

What you'll do at Persona

• Partner with product teams on short-term, high-impact projects to solve their most pressing performance and observability challenges.
• Dive deep into major incidents to uncover underlying architectural causes and drive systemic improvements to prevent future failures.
• Design, build, and promote reusable resilience patterns and tooling that make it easy for all engineers to build reliable services.
• Own and advance our observability strategy, defining the standards and building the tools that help us understand system health.
• Mentor and coach engineers across the organization, raising the technical bar for performance and reliability.
• Establish and drive a new Operational Excellence review process to foster a culture of accountability and continuous learning.
• Help define and measure SLOs for our most critical user journeys, making our product tangibly faster and more reliable for customers.

What you'll bring to Persona

• A strong software engineering background, demonstrated by 7+ years of experience building and shipping complex production systems.
• Direct experience in performance, scalability, or observability is a significant plus, but not required for a candidate with a deep engineering foundation.
• Enjoys mentoring other engineers and can clearly and concisely explain complex technical ideas.
• Deep expertise in the three pillars of observability (metrics, logs, and traces) and experience in instrumenting complex, distributed systems.
• The ability to listen with empathy, build trust, and influence other teams without direct authority.
• Ability to build robust, well-tested libraries and tools that improve the work of other engineers.
• Takes Initiative, comfortable with ambiguity, and effective at driving projects in a new and evolving environment.