OCS & Charging Engineer

Own OCS vendor engagement: technical lead on all vendor integration discussions. Configure OCS data model: Plan ID, Account ID, Quota, Balance, Credit, Expiry lifecycle. Integrate OCS with Entitlement Server (profile update API — Diameter Ro/Gy). Build account provisioning flow: create OCS account on SIM activation event. Implement credit balance and start/end (expiry) lifecycle management. Collaborate with other team members to integrate OCS as workflow activities. OCS PCRF integration: quota threshold → policy trigger via Diameter Gx. Billing reconciliation and reporting APIs. OCS production deploy, failover configuration, and load testing. Post go-live: OCS operations, new plan launches, quota adjustments, billing investigations. REQUIREMENTS Must Have 4–6 years of telecom charging / billing engineering experience — a must. Required: OCS platform hands-on experience — a must. Required: Diameter protocol — must be able to read and debug Diameter messages independently — a must. Ro interface (online charging) — credit control, used for OCS network element. Gy interface — for OCS PGW/GGSN data charging. Gx interface — for OCS/PCRF policy and charging rules. Product catalogue management: plans, bundles, quota pools, validity rules — a must. Balance management: top-up, consumption, threshold triggers, expiry — a must. REST API integration — consuming and building APIs for billing and account management — a must. SQL — querying and understanding OCS data models, billing databases — a must. Strong Advantage Experience with 3GPP charging standards (TS 32.240, 32.251, 32.299). MVNO or telecom operator experience — understanding of MVNO billing models. Webbing server / OCS middleware configuration. Experience connecting OCS to a workflow engine or orchestration platform. Nice to Have eSIM provisioning and charging — GSMA SGP.22, SM-DP+. Roaming charging: TAP/RAP, NRTRDE, inter-operator settlement. Python or Go — for scripting, test tooling, Temporal activity development. Kubernetes — understanding how OCS components are deployed. WHAT WE OFFER Fully remote An exciting and challenging greenfield platform with great skill and knowledge development opportunities. The opportunity to join a team of highly professional specialists in an international environment. The opportunity for professional development within a reputable international innovative and growing company. #J-18808-Ljbffr