Python engineer for billing and accounts

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.

• 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.
• Own API contracts across systems, keeping them stable, backward-compatible, and clearly bounded.
• Identify functionality worth extracting from the PHP core into Python services where it improves performance or maintainability.
• Design for failure: retries, idempotency, consistency guarantees, and the observability to catch problems early.
• Set the testing strategy, CI/CD, and rollout practices this layer will run on, since you're the one building them from scratch.
• Mentor and set the technical bar for two mid-level engineers who join the team after you.
• Partner closely with Platform and Product to keep architecture grounded in real business needs, not just technical elegance.
• Help shape how Billing supports new products and ventures being built on top of it.

• 5+ years of commercial Python development in production environments, including recent hands-on work.
• Strong expertise in modern Python frameworks (FastAPI preferred; Django/Flask fine).
• Real experience designing and integrating APIs, including third-party services — this is integration and product development work, not infrastructure work.
• Solid understanding of async programming and concurrency (AsyncIO, non-blocking I/O).
• Experience working with PostgreSQL and large datasets.
• Experience building and maintaining high-load backend systems.
• Strong testing practices (unit and integration tests; PyTest preferred).
• Experience with CI/CD pipelines and Docker.
• Strong ownership and product mindset: you connect engineering decisions to business impact and can defend your calls under scrutiny.
• Experience building an environment or foundation comparable to what you'd be building here, ideally under real system constraints rather than a clean slate.
• Будет плюсом: Experience working with money: billing, invoicing, or payment systems; PHP experience; Scale-up company experience; Experience with loaded projects and queue systems; Infrastructure skills; Deep third-party API experience; Knowledge of different NoSQL solutions and analytical systems; Replication, partitioning, sharding, PL/pgSQL, and other marks of serious database work

• Hybrid onboarding to start remotely and relocation support for you and your family.
• Comprehensive health insurance for you and your family.
• Professional development budget for conferences, courses, and learning resources.
• Flexible benefits package tailored to your priorities.
• Hybrid work and generous leave options for work-life balance.
• In-office perks including free meals and snacks.
• Company-funded sports activities, annual offsites, and team-building events.