Senior Software Engineer (FastAPI & Async Python)

ABOUT US Founded in 2019 and part of Y Combinator's 2020 cohort, Photoroom https://www.photoroom.com is the leading visual solution for e-commerce. We've raised Series B funding and reached 300+ million users worldwide, processing over 5 billion images annually and serving both small businesses and major enterprises like Amazon, DoorDash, and Decathlon through our mobile app, web platform, and API. We're a remote-friendly team of 100+ passionate builders giving e-commerce businesses superpowers to create visuals that help them grow, making the hardest parts of selling online disappear. We focus on craft, innovation, and collaboration, creating exceptional impact for e-commerce businesses worldwide. We are looking for a Senior FastAPI engineer to help us add new AI features in Photoroom. You will use asyncio heavily to build and enhance AI features, improve private API speed, and integrate multiple services to deliver high-quality images and videos to our users Compensation: 100k to 110k* + Stock-Options/BSPCE (Local currency) Location: Remote with with monthly Paris office visits (fully reimbursed). We can hire people already based in selected countries only: France, Germany, Ireland, Italy, Portugal, Spain, UK, Poland. ABOUT THE ROLE - You'll collaborate with the AI Tools squad implement and improve AI features in the Photoroom app (Logo maker, AI Images, AI Videos, and other features available on the homepage of the app). - You'll design and architect new features, chaining a mix of internal and external services to generate breathtaking images and videos for our users. - You'll monitor and scale the growing load on the FastAPI service, leveraging Datadog to find optimisations and bottlenecks or implementing smart caching of pipeline steps. ABOUT YOU - You have experience designing and updating internal REST APIs operating at scale, collaborating with other teams to gather their requirements and monitoring and improving the performance of existing services, ideally with Datadog. - 5 years of production python & fastapi is a minimum baseline. - You have a strong practical understanding of FastAPI or a similar async Python http framework (has to be async). - You know how to keep async actually async. You can identify blocking calls in async handlers, know when to offload CPU-bound work to a thread, and treat protecting the event loop as table stakes. - You have experience with integration testing in a large Python project and wiring multiple external services or APIs together reliably - You have worked in a fast-paced startup in the past and thrive in high-autonomy environments where you set your own direction and own outcomes end-to-end - Bonus: experience working with AI APIs in production If you think you have what it takes but don't meet every single point above, please still apply. We'd love to chat and see if you could be a great fit. HIRING PROCESS - Screening call with the Talent Manager - Technical interview with the Hiring Manager - Home technical assignment, followed by a review with the team - Culture fit interviews and meet the team! - Reference check & Offer Support - If you have a medical condition or an individual need for an adjustment to our process, and you believe this may affect your ability to be at your best - please let us know so we can talk about how we can best support you and make any adjustments that may be needed. BENEFITS - Work flexibly from one of our core countries: France, Germany, Italy, Spain, Poland, the US (NYC) - Regular team gatherings, including in-person onboarding in Paris (1-2 weeks), yearly company offsite and team retreat, quarterly in-person meetings (monthly during probation period), and social events like winter party and hackathons. - 30 days annual leave plus local public holidays - Competitive equity package with stock options/BSPCE, giving you ownership in our growing company - €1000 one-time home office grant OR €400 per month co-working space stipend - €1,000 annual learn