Plain is redefining customer support for the next generation of B2B companies. We’re building the fastest, most powerful platform to help companies move beyond reactive support and build true customer relationships. Some of the world’s most forward-thinking companies - like Cursor, Raycast, and Granola - trust Plain to unify all customer interactions, enable faster team collaboration, and supercharge their workflows with AI. B2B customer support is undergoing a seismic shift. AI is transforming the way companies engage with customers, shifting support from a siloed function to a company-wide effort across Slack, Discord, and any other channel you talk to customers in. The old way - slow, manual, and disconnected - no longer works. We’re looking for a Senior Platform Engineer to join our team and own the evolution of our infrastructure and tooling to make Plain scale with our customers and dramatically accelerate product teams. WHAT YOU’LL DO You’ll help define and execute the future of our platform architecture, working closely with other engineers to ensure Plain remains fast, reliable, and secure as we scale. You will: - Lead key infrastructure initiatives. This includes projects... Click Apply to read the full job description.