Founding Python Engineer for Billing & Payments Platform

Manychat, Inc; Amsterdam; Hybrid; EUR 120,000 - 180,000; Full time

Benefits offered by this job

Hybrid onboarding & relocation support

Health insurance

Professional development budget

Flexible benefits package

Hybrid work & leave options

In‑office perks: free meals & snacks

Company-funded sports & offsites

Job summary

Manychat is seeking a senior Python engineer to build billing's own Python layer, bridging product features with the existing PHP core. You will define patterns for service communication and shape architecture for a scalable, async billing platform.

You’ll own API contracts, drive testing strategy, CI/CD, and mentorship for two mid‑level engineers, partnering with Platform and Product to align technical decisions with business needs.

Qualifications

• 8+ years of commercial Python development in production environments.
• Strong expertise in modern Python frameworks (FastAPI preferred; Django/Flask okay).
• Experience designing and integrating APIs, including third‑party services.
• Solid understanding of async programming and concurrency.
• Experience with PostgreSQL and large datasets.
• Experience building 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: connect engineering decisions to business impact.
• Experience building an environment or foundation comparable to what you'd be building here under real system constraints.

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 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

FastAPI

API design

Async programming

PostgreSQL

High-load systems

Testing (PyTest)

CI/CD

Docker

Ownership mindset

System architecture

Tools

Docker

Job description

Manychat is seeking a senior Python engineer to build billing's own Python layer, bridging product features with the existing PHP core. You will define patterns for service communication and shape architecture for a scalable, async billing platform.

You’ll own API contracts, drive testing strategy, CI/CD, and mentorship for two mid‑level engineers, partnering with Platform and Product to align technical decisions with business needs.