Staff Engineer, Platform/ SRE

OneSignal is a leading omnichannel customer engagement solution, powering personalized customer journeys across mobile and web push notifications, in-app messaging, SMS, and email. On a mission to democratize engagement, we enable over a million businesses to keep their users engaged by delivering billions of messages daily.

As a Staff Engineer, Platform/SRE at OneSignal, you'll be joining a high-scale environment serving billions of HTTP requests daily. We've achieved this scale through strategic use of technologies like Rust and Go, optimizing for both performance and resource efficiency.

Key Responsibilities:

• Lead and architect infrastructure and operational systems at scale
• Maintain and improve our 99.95% uptime while supporting business growth
• Build and automate systems for product infrastructure and operations
• Manage critical services including PostgreSQL, Redis, Kafka, and Kubernetes
• Design and implement infrastructure-as-code solutions
• Establish and maintain observability and monitoring systems
• Lead CI/CD improvements and infrastructure automation
• Collaborate with product teams on architecture and operability
• Participate in on-call rotations for system reliability

Technical Requirements:

• 8+ years of platform engineering experience
• Strong background in operating large-scale production systems
• Deep knowledge of Linux systems internals
• Experience with infrastructure automation and DevOps practices
• Expertise in PostgreSQL or similar high-scale databases
• Hands-on experience with Kubernetes deployment and management
• Proficiency with major cloud providers (AWS/GCP/Azure)
• Experience with observability and monitoring systems
• Knowledge of infrastructure-as-code practices

We offer:

• Remote-first culture with offices in San Mateo, CA and London
• Opportunity to work on high-scale systems serving billions of requests
• Collaborative environment focused on learning and growth
• Competitive compensation and benefits
• Flexible work arrangements across US and UK locations

OneSignal has a strong engineering culture focused on scalability and reliability. We serve over 1.8 million businesses worldwide, including major companies like Zynga, USA Today, and Bitcoin.com. As a Series C company backed by SignalFire, Rakuten Ventures, and Y Combinator, we're growing rapidly while maintaining our commitment to technical excellence and work-life balance.