Senior Software Engineer

At Ploy, we’re building the first growth automation software with your website at its core. We serve innovative operators at growth and marketing agencies, tech start-ups, and some traditional industries as well. They build their website with Ploy’s agents, and then those agents automatically research the landscape and business context, identify winning strategies for account-based personalization, SEO/AEO, conversion rate optimization, and ship dozens of on-brand, on-strategy web pages in seconds to drive traffic and conversions. Our vision is to completely re‑define the concept of a marketing website in today’s agentic world. And tear down the broken, archaic low‑code tech stacks of the last generation of website builders. With agents, we can unburden a world of story‑tellers from manual work, long timelines, and being blocked by internal and external resourcing, and return them to a world of, “yes, and” + “let’s just do it.” It’s a big, scary ambitious vision, but our team is uniquely positioned to do it. Some of the best engineers, design engineers, and growth engineers in the world. World‑class investors. And one of our co‑founders is Bryant Chou, the former co‑founder and CTO of Webflow. Yes, uniquely positioned. And last but not least, hopefully you, the one reading this. About the Role From our experience at Webflow and other category‑defining companies, we believe deeply that the next generation of software will be built by engineers who can move fast, think from first principles, and use AI to collapse the distance between idea and execution. Ploy is hiring a Senior Software Engineer to help define and build the technical foundation for that future. You’ll work across the core Ploy platform: the product surfaces users touch every day, the agent‑powered workflows that make websites build themselves, and the systems that let teams ship high‑performing pages in seconds instead of weeks. This role sits at the intersection of product engineering, AI, infrastructure, design engineering, and growth. You’ll help architect and ship the systems behind agentic website creation — from web editing experiences and generation pipelines to publishing infrastructure, personalization, analytics, internal tools, and the workflows that turn strategy into live pages. This is a high‑ownership senior engineering role at an early‑stage startup. You won’t just execute on a roadmap. You’ll help shape it. You’ll work closely with founders, designers, growth engineers, and customers to identify the most important problems, design practical technical solutions, and ship production software that directly impacts the business. You should be someone who loves building, has strong product taste, cares deeply about craft, and knows how to balance speed with long‑term technical leverage. You should be comfortable operating in ambiguity, making architecture decisions without perfect information, and raising the quality bar for the team around you. What You’ll Own Technical ownership — Own major parts of the Ploy product and technical architecture, from early design decisions through implementation, launch, and iteration Core product development — Build and improve the user‑facing Ploy product across website creation, editing, personalization, publishing, analytics, and agent‑powered workflows AI‑powered systems — Design and implement systems that let users collaborate with agents to research, generate, edit, QA, and ship web pages faster Backend systems & infrastructure — Develop APIs, services, data models, queues, workflows, and infrastructure that support reliable product experiences at scale Publishing & performance — Help ensure the websites Ploy ships are fast, reliable, SEO/AEO‑ready, production‑grade, and capable of serving real customer needs Architecture & technical judgment — Make pragmatic decisions around system design, scalability, reliability, maintainability, and developer velocity Product velocity — Work closely with design, product, growth, and customers to turn ambiguous ideas into shipped features quickly Engineering quality — Raise the bar for code quality, performance, observability, testing, error handling, and maintainability Mentorship & technical leadership — Support other engineers through code reviews, technical guidance, architecture discussions, and clear communication Customer‑driven building — Stay close to real user problems and help turn customer feedback into product improvements Qualifications The ideal candidate has: 5+ years of experience building production software, ideally in a fast‑moving startup, product engineering, infrastructure, or high‑ownership environment Experience working across the stack, from polished frontend interfaces to backend APIs, databases, infrastructure, and deployment systems Strong product instincts — you care not just that something works, but that it feels fast, clear, useful, and delightful A track record of owning complex technical projects from ambiguous problem to shipped product Strong technical judgment and the ability to make practical tradeoffs between speed, quality, scalability, and simplicity Comfort designing systems that are reliable today while leaving room to evolve tomorrow A genuine interest in AI, websites, growth, design engineering, marketing technology, and the future of software Experience collaborating closely with founders, designers, product, growth, and customer‑facing teams Comfort with ambiguity and the ability to break open‑ended problems into clear, shippable pieces A bias toward action — you do not wait for perfect specs to start building High attention to detail in code, product experience, and user outcomes Strong communication skills and the ability to explain technical decisions clearly to both technical and non‑technical teammates Comfort working in‑person with a fast‑moving team in New York City Bonus: experience with AI tools, LLM APIs, agents, prompt engineering, evals, or automation workflows Bonus: experience with Tailwind CSS, Node.js, Vercel, Supabase, PostgreSQL, Prisma, queues, background jobs, or similar tools Bonus: experience building website builders, CMS products, visual editors, publishing systems, personalization tools, or marketing/growth software This role is for someone who wants to move fast, own foundational parts of the product, and help build the software layer redefining what a marketing website can be. If that sounds exciting, we’d love to meet you. #J-18808-Ljbffr Ploy