Senior Python Engineer, Brands

WHO WE ARE 🌍 Creating content that resonates is great — turning that attention into growth is even better. That's what Manychat does. Our AI-powered automations help creators and brands engage with audiences across Instagram, Messenger, WhatsApp, and TikTok — at the right moment, with the right message, minus the manual work. We're 400+ people across three continents behind the leading platform for conversational growth, with AI skills shaping how we build, how we work, and how we grow. WHO WE'RE LOOKING FOR 🌟 You've built backend systems at real scale before — you know what breaks under load and how to design around it early. You make the call on a fuzzy problem, defend it, and adjust as you go, with an entrepreneurial streak that thrives on building something from scratch. You want a direct line to the people using what you build and you judge your work the way they do: by whether it actually moves the metric. YOUR FUTURE TEAMMATES 👋 We've built Manychat into the #1 chat platform. Now we're moving forward and building a new product, Manychat for Brands, from scratch: architecture, infrastructure, all of it. We shape what gets built and talk to our users directly — code quality matters, but the real impact we make for our customers matters more. As the product grows, you grow with it, with room to lead your own scope. WHAT YOU'LL DO 🚀 Build Manychat for Brands from the ground up — the product brands use to run campaigns with creators: inviting them, handling consent, connecting their automations and data. Small codebase, early days. Ship to real design partners in your first weeks. You're in the partner channels, you see it break, you fix it — no layers between you and the user. Own problems that aren't solved yet: observability from zero, migrating off fragile infra, cutting PHP dependencies, auth and permissions, scaling data pulls that are already slow. Decide how things get built. The team's small, so you set the patterns the next engineers inherit. Shape what gets built with PMs and leadership — the product's still taking shape, so your calls move the product itself, and the code. Build on Manychat's production infrastructure, serving millions of users — real scale from day one. Judge your work by whether it lands for brands and creators — watch the metrics as closely as the code. TO SHINE IN THIS ROLE 💥 You'll need: 8+ years building backend systems in Python. Strong Python backend design. You model domains and design services — typed data models, clean contracts, async APIs — not just endpoints. We use FastAPI + Pydantic + SQLAlchemy; equivalent modern stack is fine if you can show the same depth. Experience designing systems and defending the trade-offs: boundaries, what to build now vs later, where it'll hurt. Experience building for real load — knowing what breaks at scale and how to avoid it. Comfort operating before a clear spec exists, helping shape the product as it comes together. A track record of working directly with product...