Job Description
Kleinanzeigen reaches 36M+ monthly users and is Germany’s leading online classifieds market. We are a sustainability-focused platform where you won't just write code; you will power the services that bridge our high-traffic backend with seamless user experiences. You’ll work at the intersection of data, product, engineering, and CS. This is a hybrid role, based in Barcelona Spain. Strong proficiency in SQL and experience with data analysis tools (Tableau, Python, etc.). Experience writing technical rules with rule engines (Threatmetrix, Arkose, Sift, internal-rule based system, etc.) Profecient with Python for more advanced data analysis & automation Experience to authentication, behavioural biometrics, and fraud stemming from user generated content such as ads and messages Job responsibilities What You’ll Do Analyze fraud patterns using marketplace and behavioral data to uncover new attack vectors, emerging threats, and operational gaps. Flexibility 26 business days of paid annual holidays 20 days “work from anywhere” Flexible working time (hybrid)



Paid additional parental leave for both parents Extra paid days off for special occasions (e.g. your wedding or a move) Wellbeing & Support Private health insurance Gym Pass (may cover up to 70% of gym membership fees) 40€ per month as a remote working allowance. Growth & Development Personal development budget Learning opportunities to grow your skills and career A unique position in an international and dynamic environment A flat, collaborative culture where your feedback actively shapes our processes Perks & Everyday Benefits Competitive compensation package (Base salary + annual bonus) Adaptable Remuneration Program (tax‑efficient options for transport, restaurant vouchers and childcare) Corporate benefits and exclusive discounts An attractive referral program Kleinanzeigen is an equal opportunity employer that values diversity and inclusion. If this role sparks your interest but you’re not sure you meet every single requirement, we’d still love to hear from you anyway

📌 SQL Technical Specialist (España)
🏢 Kleinanzeigen
📍 España