Senior Python Engineer (FastAPI / Python & PublicAPI experience)

TL;DR

Senior Python Engineer (FastAPI/Public API): Design, build, and evolve the public API powering developers' integration with hirify.global’s AI image capabilities with an accent on developer experience, scalability, reliability, and versioning. Focus on abstracting complex AI models into simple interfaces, optimizing performance, and ensuring maintainability for self-serve and enterprise users.

Location: Must work flexibly from core countries: France, Germany, Italy, Spain or the UK; offices in Paris, Barcelona, Berlin, London. Relocation support available (up to €10k, visa/housing help).

Salary: €75k–110k + stock options/BSPCE (higher for outstanding profiles, adjusted for cost of living)

Company

YC-backed visual AI platform for e-commerce, with 300M+ users worldwide, processing 5B+ images yearly for businesses like Amazon and Decathlon.

What you will do

• Design, build, and evolve the public API as the core interface for developers accessing hirify.global’s AI capabilities.
• Ship reliable, scalable API features used by self-serve developers and enterprise customers, iterating quickly based on usage data and feedback.
• Own API surface end-to-end: naming, versioning, structure, implementation, performance, and maintainability.
• Work at backend-AI intersection, abstracting complex image models into elegant developer interfaces.
• Collaborate with product, ML, backend, and sales teams to deliver real user value.

Requirements

• Work from France, Germany, Italy, Spain or UK.
• English-speaking environment.
• Strong Python backend experience building APIs for external consumers (not just internal).
• FastAPI (or similar) with async patterns, concurrency, production debugging.
• Owned/contributed to public-facing API design: versioning, consistency, evolution.
• Focus on reliability, performance, developer experience; pragmatic, product-minded, ownership-driven.

Nice to have

• API deployment: Docker, uvicorn/gunicorn, health checks.
• Image processing: Pillow, pyvips.
• AI/image models behind APIs: latency, inference, abstraction.
• Node.js experience (current migration).
• Integrations or developer tooling.

Culture & Benefits

• Remote-friendly with flexible hours, international team, optional language lessons.
• Socials: retreats, offsites, team events.
• High ownership in small senior team, fast-paced startup environment.
• Extended parental leave, trust-based remote work, DEI commitment.

Hiring process

• Screening call.
• Technical interview.
• Take-home assignment + review.
• Final interviews & team meet.
• Reference check & offer.