Jobs 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.

Conduct high-volume outbound prospecting through calls, email, and LinkedIn; target strategic accounts, generate qualified meetings, manage objections, and close small deals independently. Maintain accurate HubSpot pipeline data, adapt to a fast-paced startup environment, and develop skills toward a future full-cycle Account Executive role.

Design and build scalable Java backend services for a global communication platform. Drive architectural decisions, improve distributed systems, collaborate with Product, Design, QA, and Engineering, and mentor developers through reviews and technical discussions. Own systems throughout their lifecycle, from ideation and architecture through production and continuous improvement, while maintaining monitoring and operational excellence.

Build and scale high-availability backend systems for a global telecom SaaS. Design fast, secure APIs and infrastructure, mentor teammates, collaborate across product and design, and own features end-to-end from idea to production.

Lead B2C growth for consumer mobile products by owning acquisition strategy, ASO, paid and organic channels, onboarding funnels, experimentation, conversion optimization, and retention. Work cross-functionally to run tests, build dashboards, reduce CAC, launch referral and viral initiatives, and scale repeatable growth processes.

Own and optimize the B2B customer lifecycle: design behavior-triggered, automated onboarding, activation, retention, expansion and win-back journeys. Partner with Product, Data and Customer Success to define triggers, segmentation and dashboards, run A/B tests, analyze cohorts, reduce churn and drive upsell.