Senior Engineer, Messaging Platform

Who Are We? Postman is the world’s leading API platform, used by more than 45 million+ developers and 500,000 organizations, including 98% of the Fortune 500. Postman is helping developers and professionals across the globe build the API-first world by simplifying each step of the API lifecycle and streamlining collaboration—enabling users to create better APIs, faster. The company is headquartered in San Francisco and has offices in Boston, New York, Austin, Tokyo, London, and Bangalore - where Postman was founded. Postman is privately held, with funding from Battery Ventures, BOND, Coatue, CRV, Insight Partners, and Nexus Venture Partners. Learn more at postman.com or connect with Postman on X via @getpostman. P.S: We highly recommend reading The "API-First World" graphic novel to understand the bigger picture and our vision at Postman. The Opportunity We're looking for a Senior Backend Engineer to help us reinvent Postman's Notifications Platform for the next generation of AI-powered, agent-driven experiences. As Postman evolves to support agents and autonomous workflows, notifications become much more than simple alerts. They need to be contextual, intelligent, reliable, and deeply integrated into how users interact with the platform. You'll play a key role in building the foundation that makes that possible. This isn't a role focused on maintaining an existing system. It's an opportunity to rethink and rebuild a critical platform from the ground up that will power notification experiences across Postman for years to come. You'll have significant influence over the platform's architecture, reliability, and developer experience, working closely with teams across the company to build something scalable, intuitive, and easy to adopt. What You'll Do As a Senior Backend Engineer on the Messaging team, you'll help design and build the next generation of our Notifications Platform. Some of the things you'll work on include: Reimagining the platform to support agentic, event-driven notification workflows. Designing backend systems that enable contextual notifications triggered by agents, workflows, and product events. Building reliable platform primitives for triggering, routing, delivery, retries, deduplication, rate limiting, user preferences, and notification lifecycle management. Partnering closely with teams building Agents and AI-powered experiences to understand their needs and translate them into scalable platform capabilities. Improving the developer experience through well-designed APIs, self-serve tooling, documentation, and integration workflows. Expanding observability across the entire notification lifecycle—understanding what triggered a notification, why it was sent, how it was delivered, and whether it succeeded. Ensuring the platform is designed with reliability and user trust at its core, minimising issues such as duplicate sends, stale notifications, noisy experiences, and incorrect targeting. Collaborating across infrastructure, product, design, support, and platform teams to deliver a seamless notification experience for both users and internal developers. Contributing to technical strategy, architecture reviews, engineering standards, and design discussions within the Messaging team. Mentoring engineers and helping raise the technical bar across the organisation. About You You're someone who enjoys building platforms that other engineers love to use and can confidently navigate complex distributed systems. We're excited to talk if you have: 6+ years of backend engineering experience building distributed systems, platform services, or large-scale backend applications. Strong proficiency in one or more common backend languages such as JavaScript, Python, Java, Go, PHP, or C++. Experience designing APIs, frameworks, or platform abstractions that are used by multiple engineering teams. A strong understanding of reliability, observability, operational excellence, and system failure modes. Experience working with