Senior Software Engineer, Build Loop

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About the role

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 migration work as engineering rather than chores: you budget for the parts that fail silently, verify generated output rather than trusting a green build, and know that bug-for-bug translation beats improvement when the goal is proving nothing changed. • Enjoy being a platform engineer with real customers — partnering with product teams, adapting the platform to how they actually work rather than requiring them to change, and measuring yourself on their adoption. • Are comfortable working across cloud boundaries, with a considered view on where a workload belongs and what crossing between clouds costs in latency and spend. • Communicate decisions in writing well enough that someone can pick up your work from the ticket — and are willing to say plainly when the fast answer and the right answer diverge. • Stay curious and open to growth — demonstrating a proactive embrace of AI, and actively building and applying fl

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