Senior Software Engineer, Build Loop

Webflow is the agentic web marketing platform for modern marketing teams, helping organizations build, manage, and optimize high-performing web experiences that drive predictable growth and strengthen brand trust. Building at Webflow will need grit, because we move fast, without ever sacrificing craft or quality.

We’re looking for a Senior Software Engineer to help us build the next generation of Agentic Codebases

About the role:

• Location: Remote-first (Argentina)
• Permanent, full-time employee (this is not a contractor position)
• Application Information:
• Application deadline: applications accepted on an ongoing basis until position is closed and filled
• This posting is for an existing vacancy
• Reporting to the Senior Engineering Manager, Developer Productivity

As a Senior Software Engineer, Developer Productivity, you'll:

• Design and build the Nest.js service scaffolding that lets product teams stand up new backend services in our next-generation monorepo
• Implement paved paths, generators, and the platform primitives that make a new service work on day one rather than after a week of wiring.
• Build the seams that let new services run independently of our existing monolith.
• Own the deployment story for services and web applications on Cloudflare, and the interoperability with our existing AWS and Kubernetes estate managed through Pulumi and Argo CD.
• Lead migrations of substantial codebases into the monorepo and turn each one into a repeatable recipe rather than a bespoke effort.
• Partner directly with product teams as platform customers, treating their adoption as the measure of success and their friction as your backlog.
• Raise the leverage of the whole team by encoding what you learn into tooling, generators and agent-assisted workflows, so the next migration costs less than the last.
• Participate in engineering citizenship activities such as co-authoring engineering blogs, strengthening our hiring processes, and leading internal hackathon teams.

About you

Requirements:

• BA/BS Degree or equivalent experience
• 5+ years building and operating backend services in production
• Demonstrated experience in backend service design defining service boundaries, contracts and data ownership, not only implementing within them
• Business-level fluency to read, write and speak in English

You'll thrive as a Senior Software Engineer, Developer Productivity, if you:

• Have worked inside a large, heavily-coupled codebase and found the seams: extracting or bypassing functionality incrementally, behind behaviour-preserving contracts
• Are fluent in TypeScript and Node, and comfortable with edge runtimes.
• Have hands-on experience with monorepo tooling at scale (Nx, Turborepo or similar) and understand why build-graph correctness is a product concern rather than a config detail.
• Treat