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# Staff Backend Engineer Trust & Safety

- **Company:** AVIV Group
- **Location:** Berlin, Germany (Remote available)
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Amazon Web Services, Fraud Prevention and Detection, Python (Programming Language), Machine Learning, Software Architecture, Software Deployment, Model Validation, Backend, Build Management, Machine Learning Operations, Legacy Systems
- **Published:** October 28, 2026
- **Apply:** https://www.indeed.com/viewjob?jk=bbdbe5d50a1669c5

## About the Role

* 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.

Nice to have: experience in fraud, Trust & Safety or risk; security and GDPR knowledge; ID verification or external risk providers; marketplace experience.

## Description

You'll join Trust & Safety, working with Backend and Data Engineers, ML specialists, Product Managers and Engineering Managers, and partnering closely with Legal, Compliance and our operational moderation teams.

Our next chapter is about a scalable, real-time Trust-as-a-Service platform and ML-ready infrastructure - and this role will be central to making that happen.

What You'll Own

 * Architecture and technical direction: Be the primary technical authority for Trust & Safety, owning the architectural roadmap across fraud detection, content quality and the trust platform.
 * Trust-as-a-Service 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.
 * ML systems and pipelines: Build the data collection pipelines, training and evaluation workflows, and deployment infrastructure that make our models scalable, reliable and cloud-ready.
 * Real-time scoring: Design event-driven, high-throughput streaming and stateful scoring systems that process signals in real time without degrading the user experience.
 * Legacy modernization: Lead the modernization and deprecation of legacy Trust & Safety systems, with safe migration paths and no loss of reliability.
 * Technical leadership: Mentor Senior Engineers, raise engineering standards and influence technical decisions across multiple teams.

What We'll Achieve Together

Success in this role means creating measurable improvements, not simply introducing new processes.

We expect you to help us:

 * 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.

The exact measures will be agreed based on the priorities and baseline when you join.