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Zapier’s Workflow Zone is responsible for the core engine that powers our automation platform. As more teams and organizations depend on Zapier to automate critical workflows, we’re investing in scaling the capabilities, reliability, and intelligence of our core product experience. We’re hiring a Sr. Backend Engineer to join the Runner team in our Workflow Zone. If you’re passionate about building robust systems, enabling advanced user workflows, and shaping the future of automation, we’d love to hear from you. The Workflow Zone is where Zapier’s automation magic happens. This zone owns the product experience and execution engine behind creating, running, and debugging workflows (Zaps). We’re focused on building powerful, flexible tools that help individuals and teams automate their work with speed and confidence. As automation use cases grow more complex—especially for Enterprise users—we’re evolving the platform to support more sophisticated logic, scalable execution, and AI-native experiences. This means: Building intuitive and resilient workflow authoring experiences; Expanding execution capabilities and logic primitives; Introducing AI-powered tools for creation and troubleshooting; Improving reliability, observability, and control across the system. The Runner team is responsible for reliably executing Zaps—fast. We’re focused on the core infrastructure that powers Zapier’s workflows, including scaling for high volume and reducing latency across millions of executions daily. This is a foundational team at the platform layer—ideal for engineers who like deep technical challenges and shipping resilient, high-scale services.
Job Responsibility:
Develop and maintain Zapier’s execution engine, scaling it to handle millions of daily runs
Improve system performance, reduce latency, and strengthen failure handling
Design and implement execution primitives that power reliable automation
Collaborate across infrastructure, product, and platform teams on core system design
Requirements:
5+ years of professional experience developing software
At least 2 years in a senior-level role
Strong backend experience, ideally in Python and Django and/or TypeScript and Node.js, building reliable, scalable, and observable services
Familiarity with relational databases like PostgreSQL or MySQL, and the ability to model, query, and optimize data effectively
Experience designing and consuming RESTful APIs, building event-driven systems, and working with data integrations across services
Proven ability to lead complex technical projects—owning design decisions, balancing tradeoffs, and guiding implementation across multiple contributors
Proactively coach and support teammates, foster growth through mentorship, and contribute to a culture of feedback and continuous improvement
Navigate ambiguity with confidence—able to clarify priorities, align stakeholders, and drive toward meaningful outcomes even when goals shift
Used AI tooling for work or personal use—or you are willing to dive in and learn fast