Founding Python Engineer for Billing & Payments

Manychat; Amsterdam; Hybrid; EUR 90,000 - 140,000; Full time

Benefits offered by this job

Hybrid onboarding

Relocation support

Health insurance

Dev budget

Flexible benefits

Hybrid work

Meals & snacks

Team events

Job summary

Manychat is seeking an experienced Python developer to design Billing's first Python layer, bridging the product features with the existing PHP core. You will set patterns for service communication and orchestration, and build scalable, async services for payments, invoicing, anti-fraud, and compliance.

You will own API contracts, drive the architecture with Platform and Product, and mentor two mid-level engineers as the foundation is built for this new capability.

Qualifications

• 8+ years of commercial Python development in production environments.
• Strong expertise in modern Python frameworks (FastAPI preferred; Django/Flask fine).
• Real experience designing and integrating APIs, including third-party services.
• Solid understanding of async programming and concurrency (AsyncIO, non-blocking I/O).

Responsibilities

• 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.

Skills

Python development

Async programming

API design

High-load backend

PostgreSQL

Tools

FastAPI

Django

Flask

PyTest

Docker

Job description

Manychat is seeking an experienced Python developer to design Billing's first Python layer, bridging the product features with the existing PHP core. You will set patterns for service communication and orchestration, and build scalable, async services for payments, invoicing, anti-fraud, and compliance.

You will own API contracts, drive the architecture with Platform and Product, and mentor two mid-level engineers as the foundation is built for this new capability.