Product Engineer at Flowglad (W20) $120K - $200K • 0.10% - 0.60% The payment processor for natural language software New York, NY, US Full-time Will sponsor 6+ years About Flowglad A Guild of Extraordinary Developers and Designers. NUMI connects companies with remote developers and designers. We help Silicon Valley companies quickly scale up their product development teams with excellent remote talent that's been sourced and vetted by our team. About the role Skills: Next.js, Tailwind, Node.js, React, TypeScript, PostgreSQL About Flowglad We’re building the payments layer for the next chapter of the internet. It’s programmable in natural language, requires zero glue code, and is tax compliant out of the box. We’re backed by Y Combinator, Essence VC, a top 5 VC fund (not yet announced!) and some incredible angels including Kareem Amin (CEO of Clay), Alex Rattray (CEO of Stainless), Geoff Charles (CPO of Ramp), and Colin McDonell (creator of Zod, 180m+ monthly downloads). Our product is live, but we have not yet launched. That’s because, as you can imagine, there is a veritable British coastline of product surface area that we need to polish and cohese together. We have: A production-grade billing engine for subscription and usage based billing, Our own checkout screens that handle single payments, subscriptions, and even payments for invoices A dashboard with graphs, catalog management, etc. Backend services to capture webhooks, run processing and cron jobs in the background A full stack SDK that delivers data door-to-door from our servers to our customers’ backends and frontends A thriving community of builders that has grown 5x in the last month, with many seeking to integrate Flowglad Our stack is fun: everything is on Next.js (even our REST API), tailwind, TRPC, Drizzle ORM, postgres backend, and zod everywhere! We have 150,000 lines of Typescript of which about 100,000 lines are tests. While we have a lot of room for improvement, we strive to make the customer-facing experience simple. The full product, including the back office that interfaces with the regulated and financial aspects of the business, is inevitably very complex. All of this is 100% open source: https://github.com/flowglad/flowglad/ About the Role We need an energetic founding product engineer to help us polish, systematize, and stabilize the many facets of this product. They will work very closely with Agree, cofounder and CEO (and only engineer on the project to date), our founding platform engineer, and our founding designer (one of the best in the field), and the world class payments industry experts in our network. In the next 2 months, you will own productionizing our services so that they are GA-ready. Here are just a few of the problems on our plate: Helping us deploy a multi-faceted onboarding flow to allow customers to pick between using us as their merchant of record or being the settlement merchant themselves Crafting the first-ever conversational onboarding flow for a payments product Building agentic antifraud and KYC workflows Building a shadcn component registry Building integration pathways for builders using Cursor, Windsurf, Lovable, Replit, Bolt, Kiro and every other vibe coding platform Parameterizing the UI and backend in our app to account for the regulatory requirements of merchant of record vs self settlement flows Developing plugins for major builder ecosystems: Better Auth, Framer, Convex Making our documentation more robust to cover all of the use cases we support. And then, making it ingestible into our RAG pipelines Engaging the members of our community who want to integrate to help unblock them or guide them through the process Over the next 4 months, you’ll also work closely with Agree and the eng team to help us scale our engineering output with AI. This will go beyond just using coding agents, and will involve thinking through how to design our codebase to make it easier for AI to extend or maintain. About You We are looking for a highly energetic engineer who is most motivated by the impact of their work, and wants to become an expert on-the-job about payment processing. You are excited to own the quality of the final product, which means making sure it is robust, consistent, resilient, and fits like a glove for our target users. You should have wide curiosity, and a joy for putting points on the board. You are excited at the thought of talking with customers to help unblock them, because you know that it will give you the feedback needed to further polish the product. You’ll dive into the work immediately. Slope of growth is much more important for this position than calendar years of experience. You are hungry, and want an environment where you feel unfettered to run quickly to improve the product. You are excited at the thought of posting 3 pull requests per day on average, because you know that’s only possible when: the work has been well defined you have a deep understanding of the job to be done The Anti-Pitch If this all sounds exciting, great! We want to give you fair warning about some of the things we hold dear. They are core to us, but are not for everyone. We are aiming to be the very best in the world at what we do. So we seek excellence in ourselves and those around us. We believe this is a once-in-a-lifetime magic opportunity. Consequential payments companies hatch during technology shifts. So this will not be a chill job We move very quickly, even for an early stage startup. We have thousands of engineering-years of work to re-litigate so that we can get to the frontier of a rapidly evolving field. Technology Our developers work with the technologies that our customers use to develop their products. So far a lot of our customers have needed React and Node.js expertise, with others requesting Rust, Golang, Elixir, and more. Building high scale log streaming infrastructure in Typescript to consolidate millions of bank transactions across tens of thousands accounts in real time Re-architecting backend services from EC2 to Kubernetes and Node to Nest at the same time Building a code editor plugin that allows engineers to collaborate on pull requests and code reviews, that works across all major editors Migrating a Python GraphQL server to Node, written in Typescript, running on Serverless Interview Process 20 minute first screen 45 minute deep dive on the most interesting technical challenge you’ve ever solved 45 minute technical design interview 4 hour coworking session in person, solving a real infrastructure problem within our product 5 day work trial