Teams at Onoff

Build and maintain end-to-end backoffice features and internal tooling for a global telecom platform. Develop Java backend services and React or Angular interfaces, manage testing, CI/CD, deployment, monitoring, debugging, and code reviews. Collaborate within a lean engineering squad and take ownership of delivering reliable, high-performance solutions.

Investigate telecom and payment fraud by monitoring customer activity, reviewing SMS, voice, usage, and payment patterns, handling disputes, and responding to partner inquiries. Conduct manual account and KYB reviews, identify fraud typologies, block or restrict fraudulent accounts, maintain investigation records, produce operational KPIs, and recommend improvements to fraud detection rules and controls. Collaborate with Customer Support, Product, Engineering, Finance, and Revenue Assurance teams.

Manage business verification cases in Sumsub, reviewing documents, resolving blocked or rejected files, and supporting customers through KYB requirements. Monitor recurring issues, identify root causes, escalate anomalies, and propose process improvements. Collaborate with Product, Tech, Compliance, and Customer Care teams while maintaining documentation, procedures, checklists, and customer response templates.