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OneSignal | San Mateo, CA | Full Time | ONSITE | Full Stack Dev | Senior Full Stack Dev | Solution Architect | Distributed Systems Architect | Additional Positions OneSignal is a YC and SignalFire backed push notification & email platform for mobile apps and websites. Our mission is to democratize access to great messaging tools for all publishers. Over the last three years, we’ve grown to deliver 4.1 billion notifications per day for 220,000 apps and websites. Our stack includes React+Typescript for our dashboard, Ruby on Rails, Rust (for our delivery system), Spark (for our data projects), and PostgreSQL with 12 first-party mobile SDKs. Job Link: https://onesignal.com/careers Our Team is growing and we currently have 15 open positions!