Senior Software Engineer, Full Stack

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About this role

Senior Software Engineer, Full Stack Remote Postscript is the AI messaging platform trusted by 20,000+ Shopify brands - including Brooklinen, Ruggable, True Classic, and Dr. Squatch. With a mission to make SMS your number one revenue driving channel, we built the best-in-class SMS marketing platform and launched revenue-driving AI features not available on any other platform. And we're just getting started. Backed by Greylock and Y Combinator, fully remote since 2018. As a Senior Fullstack Engineer at Postscript, you'll be a high-ownership contributor to one of our core product or platform teams - owning meaningful systems end-to-end, driving technical quality, and helping shape how we build across the organization. Our engineering teams operate at the intersection of scale and product velocity, which means you'll be working on distributed systems that matter to the business while also influencing the technical standards that allow Postscript to grow sustainably. This is a high-autonomy role for engineers who are energized by ambiguity, take genuine ownership of their work, and bring a strong point of view on how to build things well - without sacrificing speed or pragmatism. AI isn't a nice-to-have here - it's central to how we work. We expect our engineers to be active practitioners of AI-first development: fluent with the latest agentic coding tools, curious about what's emerging, and constantly pushing the boundary of what's possible with AI in their day-to-day craft. If you're the kind of engineer who's already experimenting with new models and tooling before anyone asks you to,

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