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 customer engagement, we enable businesses to keep their 1.5B monthly active users engaged and up to date by delivering over 1.3T messages a year!

1 in 4 app publishers trust OneSignal to power their customer engagement! And we support companies in 140 countries! Our customers range from startups and small businesses just getting off the ground to established companies such as Live Nation, American Express, Whole Foods, Zynga, Bitcoin.com, and many more.

We’re Series C, venture-backed by SignalFire, Rakuten Ventures, Y Combinator, HubSpot, and BAM Elevate. We offer remote work as the default option in the United States in California, Colorado, Massachusetts, New York, New Jersey, Oregon, Pennsylvania, Texas, Utah and Washington. As well as in the UK, Singapore, and Canada - with plans to expand the locations we support in the future. Some roles are hybrid roles and will be listed as such. We have offices in San Mateo, CA and London, UK, and offer flex seating options for employees to work together in-person in NY and other areas. Hiring in Singapore is done in partnership with a local EOR, and hiring in Canada is done in partnership with Rippling's EOR.

OneSignal has a lot of the great tech startup qualities you'd expect, but we don't stop there. Our massive scale and small team, emphasis on collaboration, and focus on ownership and personal growth make OneSignal a uniquely great place to work.

About The Team:

We have grown rapidly to where we are today, serving billions of HTTP requests daily. We achieved this scale by writing scale-sensitive components in languages like Rust and Go. This potent combination of high performance with efficient resource utilization has given us an incredible competitive edge.

We are seeking a Platform Engineer to join our team and help us scale by managing and developing the next generation of our infrastructure. While we currently maintain a 99.95% uptime, we are dedicated to sustaining this level of reliability as our product and business expand.

In this role, your core responsibility will be software engineering with a specialized focus on operations, infrastructure, and automation. You will develop the systems that power our product, enhance internal services, and provide architectural guidance to product teams to ensure optimal service operability.

You will leverage Kubernetes to automate data center functions and create services that streamline database operations. A major aspect of this position is gaining a deep enough understanding of our systems to move beyond manual intervention and build sophisticated software solutions that fully automate these processes.

What You'll Do:

Optimize and Elevate Performance: Identify bottlenecks in our systems and unleash your creativity to introduce cutting-edge optimizations. You'll have the chance to improve the performance of our databases and evaluate innovative storage technologies that will elevate our infrastructure to new heights.
Forge Infrastructure as Code: Take the lead in setting up robust infrastructure and configuration-as-code with Kubernetes and Terraform. You'll be at the forefront of shaping our foundational architecture, ensuring it’s both resilient and scalable.
Drive Observability and Monitoring: Establish and maintain a state-of-the-art observability and monitoring stack. Your insights will enable us to stay ahead of potential issues, ensuring our services remain reliable and performant.
Craft the Golden Path for CI/CD: Define and implement best practices for continuous integration and deployment. Your work will streamline the deployment process for our engineering teams, allowing them to roll out new features swiftly and safely.
Collaborate Across Teams: Work closely with engineering teams to architect highly scalable, observable services. Your collaboration will be essential in creating a cohesive and efficient development environment.
Be a Key Player in Incident Response: Join the on-call rotation and play a crucial role in maintaining our systems' health. Your expertise will be vital in troubleshooting and resolving issues, ensuring our services always meet the highest standards.

What you'll bring:

At least 8 years of platform experience
Experience operating reliable production systems at scale
Knowledge of Linux systems internals
Desire and ability to automate tasks
Experience managing PostgreSQL for high-scale throughput systems, or similar experience with other relevant SQL datastores.
Operational experience deploying and managing Kubernetes
Experience working with Cloud Providers (AWS/GCP/Azure)

We value a variety of experiences, so these are not required. It would be an added bonus if you have experience in any of the following:

Recently writing Go and/or Rust
Working with ScyllaDB
Redis, Kafka, etcd, Clickhouse, Kubernetes

The base salary in UK for a Senior Software Engineer full-time position is between GBP 100,000 and GBP 125,000, and for the Staff level is GBP 125,000 and GBP 145,000. Your exact starting salary is determined by a number of factors such as your experience, skills, and qualifications. In addition to base salary, we also offer a competitive equity program and comprehensive and inclusive benefits.

Qualities we look for:

Friendliness & Empathy
Accountability & Collaboration
Proactiveness & Urgency
Growth Mindset & Love of Learning

In keeping with our beliefs and goals, no employee or applicant will face discrimination/harassment based on: race, color, ancestry, national origin, religion, age, gender, marital domestic partner status, sexual orientation, gender identity, disability status, or veteran status. Above and beyond discrimination/harassment based on 'protected categories,' we also strive to prevent other, subtler forms of inappropriate behavior (e.g., stereotyping) from ever gaining a foothold in our office. Whether blatant or hidden, barriers to success have no place in our workplace.

Applicants with disabilities may be entitled to reasonable accommodation under the terms of the Americans with Disabilities Act and certain state or local laws. A reasonable accommodation is a change in the way things are normally done which will ensure an equal employment opportunity without imposing undue hardship on OneSignal. Please inform us if you need assistance completing any forms or to otherwise participate in the application and/or interview process.

OneSignal collects and processes personal data submitted by job applicants in accordance with our Privacy Policy - including GDPR and CCPA compliance. Please see our privacy notice for job applicants.

Senior or Staff Software Engineer, SRE/ Platform Team