Python Backend Developer – AI Scale-up - 105K + stock

Do you get energy from working in a start-up environment where every line of code has impact? Do you want to take real ownership of the core systems in a fast-growing AI platform — not just tickets handed down from above?Here’s your chance to help scale a product that is changing how companies select and hire talent.About the companyOur client is a rapidly growing HR-tech scale-up in Amsterdam, building an AI-driven selection engine that automates prescreening, assessments and scheduling. Backed by strong funding and trusted by European customers, they are scaling fast.The setup is pure start-up mode: a small engineering team (4 people, soon 5+), no middle management, short lines, and a culture that thrives on drive, learning and speed. You’ll see the results of your work live within days — not months.This is not the place for 9–5 routines. It’s the place for engineers who love building, experimenting and growing together in a team that takes pride in shipping.What you’ll doTake ownership of the core backend services and APIsMake the platform scalable as customer usage keeps growingBuild and maintain ATS integrations and assessment workflowsImprove performance, reliability, testing and code qualityBe a mentor and example for less experienced teammatesCollaborate directly with founders, product and frontend engineersWhat we’re looking for5+ years of backend experience in Python OR Go / Elixir / RustStrong track record building scalable systems and APIsStart-up mentality: high energy, learning mindset, no 9–5 attitudeStrong product sense — you care about impact and user valueWhat you’ll getSalary: €80.000 – €105.000/year depending on experienceStock optionsA modern office in AmsterdamA high-ownership role where your voice mattersThe excitement and energy of a real scale-up journeyWho you areExperienced – you’ve seen multiple environments (start-up/scale-up)Language-flexible – fluent in Python or another modern backend stack (Go, Elixir, Rust)Mentor-minded – you lift others up while pushing standards higherScale-up ready – you thrive in pace and uncertaintyPassionate – you believe in product impact and enjoy seeing your work live fastImportantWe can only consider candidates already living in the Netherlands with a valid EU work permit. No visa sponsorship or relocation support.Interested?Want to join a scale-up where your code truly shapes the product?Email D.gontha@haystackpeople.nlKeywords: Python, Go, Elixir, Rust, Backend, APIs, SaaS, HR-Tech, Scale-up, ATS Integrations, Start-up Mindset, High Ownership, Amsterdam, €80–105K + stock