Senior Python Engineer (Billing)

We help creators get more out of every conversation with Instagram-focused automations and support for other channels like Messenger, WhatsApp, and TikTok. The result? Better engagement, more sales, and real, sustainable growth.

With a diverse team of 350+ people across three continents, we’re building the leading Chat Marketing platform — trusted by more than 1.5 million customers worldwide. AI is one of our top strategic priorities. We’re building intelligent, production-grade systems that power conversations at scale — and we’re just getting started.

We’re hiring a Senior Python Engineer to build and evolve a Python-based platform layer that extends and scales Manychat’s eng core.

This is not a standalone backend. This layer acts as a bridge and execution environment for high-load, business-critical workflows that cannot be efficiently handled inside the core system.

Your primary focus will be designing systems that:

• decouple and offload complexity from the core platform
• enable scalable execution of business logic
• provide reliable communication between services

This role is ideal for someone who:

• thinks in systems, not services
• understands trade-offs of distributed architectures
• can turn loosely defined problems into stable production solutions
• is comfortable working close to platform boundaries and constraints

• →Design and build a Python-based platform layer that integrates with the core system.
• →Define and evolve patterns for service communication, orchestration, and responsibility split between core and Python services.
• →Develop scalable, async services handling high-load and latency-sensitive workflows.
• →Own API contracts between systems, ensuring stability, backward compatibility, and clear boundaries.
• →Identify and extract functionality from the core into scalable services where it improves performance or maintainability.
• →Ensure reliability of cross-system interactions through observability (monitoring, logging, tracing).
• →Design for failure: retries, idempotency, consistency guarantees.
• →Drive engineering quality: testing strategy, CI/CD, safe rollout practices.
• →Work closely with Platform and Product teams to align architecture with business needs.
• →Contribute to long-term platform scalability, not just feature delivery.

• 5+ years of commercial Python development in production environments.
• Strong expertise in modern Python frameworks (FastAPI preferred; Django/Flask acceptable).
• Solid experience designing and integrating APIs (including third-party services).
• Strong 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 — able to align with stakeholders and connect engineering work to business impact.

• Experience working with loaded projects and queue systems.
• Skills working with infrastructure.
• Experience working with third-party API.
• Knowledge of different NoSQL solutions and analytical systems.
• Replication, partioning, sharding, PL/pgSQL, and other attributes of profound work with databases.