WHO WE ARE Creating content that resonates is great — turning that attention into growth is even better. 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.
Billing's own Python layer.
Billing runs entirely on PHP today, and it works. But Manychat is entering a multiproduct chapter: new ventures and brands are launching on top of the core platform, and Billing has to carry that weight. It's a foundation that doesn't exist yet — a Python layer built to carry payments, billing, anti-fraud, and compliance logic at scale.
You'll be the first engineer on it, which means you set the patterns, the standards, and the judgment calls, and shortly after, you'll mentor two engineers who join to build alongside you.
We run Manychat under serious load, every day,



and get it ready to handle even more. You'll do that work alongside a team that already moves fast, holds a high bar, and has each other's backs when it counts.
Design and build Billing's first Python layer: the bridge between product features and the existing PHP core.
Define the patterns for service communication, orchestration, and how responsibility splits between Python and PHP.
Build scalable, async services for high-load, latency-sensitive billing workflows: payments, invoicing, anti-fraud, and regulatory compliance.
Identify functionality worth extracting from the PHP core into Python services where it improves performance or maintainability.
Set the testing strategy, CI/CD, and rollout practices this layer will run on, since you're the one building them from scratch.
Help shape how Billing supports new products and ventures being built on top of it.
First 3 months: you understand the PHP core, Billing's constrai

📌 Founding Python Engineer, Billing (Barcelona)
🏢 Manychat
📍 Barcelona