WEX Inc is looking for a Sr. Director, Site Reliability Engineering, Mobility to architect and lead resilience for our global mobility platform. You will lead a high-performing organization dedicated to ensuring our critical services—from real-time GPS tracking to global payment processing—are seamless, scalable, and secure, bridging the gap between ambitious product velocity and high availability.

What You'll Do

Define the multi-year SRE roadmap, pivoting from reactive firefighting to proactive, automated platform health.
Oversee infrastructure supporting millions of concurrent trips globally, accounting for local regulatory and latency requirements.
Own the end-to-end incident lifecycle, fostering a blameless culture focused on root-cause analysis and permanent remediation.
Deploy AI/ML models to analyze historical telemetry data to predict capacity hotspots and system fatigue hours before they manifest.
Partner with Product and Engineering VPs to balance innovation speed with reliability via strictly enforced Service Level Objectives and Service Level Indicators.
Work closely with product and commercial partners to drive, prioritize, and work backwards from customer requirements.
Drive effective monthly, weekly, and quarterly mechanisms to plan, execute, and audit workstreams.
Optimize a massive global cloud footprint (AWS/GCP/Azure), ensuring performance doesn't come at the cost of unsustainable burn.
Champion Infrastructure as Code and self-service tooling so developers can deploy safely without manual intervention.
Establish a robust and clear engineering roadmap to maintain clarity and motivation for the engineering team.
Establish measurement of metrics-driven dev productivity across the Mobility SRE organization.
Comfortably present, influence, and communicate to the senior leadership team with regular updates.

What We're Looking For

BS/MS in Computer Science, Engineering, or equivalent practical experience.
12+ years in SRE, with at least 5 years in a senior leadership role (Director or above) managing managers.
Proven track record of managing distributed systems at a hyper-scale level (e.g., millions of requests per second).
Expertise in rapid development and deployment using cloud computing platforms such as AWS or Azure.
Deep understanding of Kubernetes, service mesh (Istio/Linkerd), edge computing, and global traffic management.
Excellent leadership, team-building, and dynamic decision-making skills. Ability to deal with ambiguity and thrive in a fast-paced, dynamic environment with excellent verbal and written communication skills.

Nice to Have

Experience with high-concurrency, geospatial, or real-time marketplace dynamics.
Experience building high-performance distributed systems at internet-scale companies.
Experience building credit card products, or experience developing solutions in a scheme/network.
Experience building or managing fleet systems.
Experience working on closed-loop card systems.