OCS & Charging Engineer

Location: Finland (Remote) (FI)

Description

• 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.
• Configure product catalogue: plans, bundles, add-ons, data passes.
• Implement quota management APIs: top-up, deduction, balance query.
• 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.
• –  Configuration, administration, and troubleshooting of an OCS — any vendor: Ericsson, Huawei, Nokia, Netcracker, Alepo, PortaOne, Aradial, opensource, etc.
• –  Understanding of online charging architecture: CTF, OCF, Rating, Account Balance Management.
• 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.
• Fluent English — 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.
• Entitlement Server / PCRF integration experience.
• 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.

About Webbing

Founded in early 2010, Webbing is a global data MVNO that delivers enterprise grade, global connectivity and IoT services across more than 200 countries and 600+ mobile carriers' networks. Webbing's secured network delivers network protection and web content intelligence.

Enterprise customers can manage, monitor, and optimize data usage in real-time with Webbing's powerful software platform. Gain visibility by application type and have the power to white list applications and limit non-business applications with the click of a button, saving money and improving compliance.

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.