Senior Python Engineer (FastAPI / Python)

Senior Python Engineer (FastAPI / Python) About us Photoroom https://www.photoroom.com launched in 2020 after being accepted into Y Combinator and has become the world's most popular AI photo editor over the past four years. Our goal is to create the technology allowing anyone create studio-level product images in minutes. With over 300 million downloads and processing 5+ billion images annually, we serve both individual creators and major enterprises like Amazon, DoorDash, and Decathlon through our B2C app and B2B API solutions. We're a profitable, remote-friendly company that has raised Series B funding and aims for 40% year-over-year growth. Our team of 100+ passionate builders focuses on craft, innovation, and collaboration, creating exceptional impact for entrepreneurs and businesses worldwide. 🤓 We are looking for a strong Python engineer to take ownership of the public API that powers how developers integrate Photoroom into their products. This is a high-impact role at the intersection of developer experience and applied AI, where you’ll shape the interface used by both self-serve users and large enterprise customers. 💰 75k – 110k* + Stock-Options/BSPCE 🇪🇺 Work from anywhere in Europe, with monthly trips to Paris (fully reimbursed), or come to the office more often ✈️ Relocation support available (up to €10k), including help with visa and housing 🏖️ Socials – company retreats, offsites, and regular team events 🇬🇧 International team, English-speaking environment, with optional language lessons We can go higher for outstanding profiles and adjust for cost of living where needed ✨ ABOUT THE ROLE ✨ - You will design, build, and evolve our public API product — the core interface through which developers access Photoroom’s AI capabilities. - You will ship features used by both self-serve developers and large enterprise customers, ensuring the API remains reliable, scalable, and easy to integrate. - You will own the API surface end-to-end: from design decisions (naming, versioning, structure) to implementation, performance, and long-term maintainability. - You will iterate quickly based on real usage — we ship multiple times per week — using data and user feedback to prioritise what matters most. - You will work at the intersection of backend engineering and AI, abstracting complex image models into simple, elegant developer-facing interfaces. - You will collaborate closely with product, machine learning, backend, and sales teams to ensure the API delivers real value to users. You will join a small, senior team with high ownership and direct product impact from day one. ✨ ABOUT YOU ✨ - You have strong experience building backend systems in Python, with a focus on APIs used by external consumers (not just internal services). - You are comfortable with FastAPI (or similar frameworks) and have worked with async patterns, concurrency, and production debugging. - You have owned or significantly contributed to the design of public-facing APIs — thinking about versioning, consistency, and long-term evolution. - You care deeply about reliability, performance, and developer experience. - You are pragmatic and product-minded — you prioritise impact and speed, and avoid over-engineering. - You take ownership and are comfortable making decisions, while collaborating closely with cross-functional teams. - You have worked in high-performing teams, ideally in fast-paced or startup environments. - You communicate clearly and can translate technical decisions into something others can understand. Bonus points if you: - Have experience with API deployment patterns (Docker, uvicorn/gunicorn, health checks, etc.) - Have worked with image processing libraries (Pillow, pyvips…) - Have integrated AI/image models behind APIs (latency, inference, abstraction) - Have experience with Node.js (current API is being migrated) - Have built integrations or developer-facing tooling ✨ HIRING PROCESS ✨ - Screening call ... (truncated, view full listing at source)