Backend engineer in Trust & Safety

Trust is what makes a real estate marketplace work: home seekers, owners and professionals all need to know that listings, accounts and interactions are genuine. AVIV's Trust & Safety organization builds the detection, scoring and verification mechanisms that protect that trust across our brands. We are building a real-time Trust-as-a-Service platform and modernizing the legacy systems behind it, and we need a technical authority to set the direction. This is an opportunity to build and improve, not simply maintain.

• Be the primary technical authority for Trust & Safety, owning the architectural roadmap across fraud detection, content quality and the trust platform.
• Design and build a scalable, real-time platform for fraud detection, content quality, identity verification and risk scoring that other AVIV product teams can consume.
• Build the data collection pipelines, training and evaluation workflows, and deployment infrastructure that make our models scalable, reliable and cloud-ready.
• Design event-driven, high-throughput streaming and stateful scoring systems that process signals in real time without degrading the user experience.
• Lead the modernization and deprecation of legacy Trust & Safety systems, with safe migration paths and no loss of reliability.
• Mentor Senior Engineers, raise engineering standards and influence technical decisions across multiple teams.
• Reduce fraud through real-time risk scoring.
• Move Trust & Safety workloads onto the new platform and retire legacy systems.
• Shorten the path from model training to production deployment.
• Keep fraud checks within a latency budget with no incidents caused by them.
• Give Product and Operations reliable visibility into core risk-scoring and platform metrics.

• Strong machine learning knowledge — you understand how models are trained, evaluated and deployed, and can build the pipelines and infrastructure that run them in production.
• Significant backend engineering experience (typically 7+ years), ideally in Python, with deep expertise in distributed, high-scale systems.
• Strong hands-on AWS experience (Lambda, Kinesis, Glue, Athena, ECS) and Infrastructure as Code with Terraform.
• Experience with event-driven and real-time streaming architectures, including stateful systems and real-time scoring.
• Staff-level architecture skills: you have led large-scale legacy modernization, influenced multiple teams without direct authority and mentored senior engineers.
• Будет плюсом: experience in fraud, Trust & Safety or risk; security and GDPR knowledge; ID verification or external risk providers; marketplace experience

• Hybrid – 2-3 days per week in the office.
• 30 days of holiday per year
• Hybrid work, with remote working abroad possible within the EU/EEA and Switzerland (four weeks' notice and your manager's approval)
• Company pension scheme
• JobRad
• Mobility allowance of up to €63 per month
• Urban Sports Club membership
• Mental health support with Kyan Health
• Learning and development through Juno Journey
• 2 volunteering days per year
• Corporate benefits through Axel Springer Corporate Benefits or Benefits.me
• Healthy snack and lunch selection (lunch offers depend on location)
• Office dogs welcome (pre-registration necessary)
• Benefits may vary by location.