Resource Request –

1.

Position

Details

Role nameSenior Java DeveloperLevel of seniority requiredSeniorNo. of open positions2Offices where role is openIndiaPriority of the positionActiveOpen date of the position28.07.2026Starting date expectedASAPLanguage requiredEnglish (mandatory)Engagement contextMaintenance & Support (TSA) + new service developmentType of recruitmentReplacement

2.

Role Description / Summary

We are looking for a Senior Java Developer to develop, maintain and support the R Systems “Telco-in-a-Box” (TIAB) platform, a carrier-grade convergent charging and service-orchestration solution deployed for a major telecom operator. TIAB combines the OpenCloud Rhino (JAIN SLEE) telecom application server with a SAP Convergent Charging (SAP CC) real-time charging engine and a set of surrounding components (Diameter Signaling Platform, PowerMedia XMS/IVR, EAI, CRM, VMS, BI and monitoring). The successful candidate will provide Level 2 / Level 3 support under the Technical Support Agreement (TSA), resolve defects, implement change requests and enhancements, and act as a technical reference within a distributed delivery team across Romania, India and Malaysia.

3.

Technical

Setting (TIAB Platform)

The candidate will work across the following TIAB components and third-party technologies:

- OpenCloud Rhino – JAIN SLEE telecom application server.
- SAP Convergent Charging (SAP CC) – real-time convergent charging / rating engine
- Dialogic PowerMedia XMS – media server hosting the IVR
- SIP Call Control, IVR and BSS for Account-Based Services Platform (prepaid call control, subscriber-based).
- EAI (enterprise integration layer), CRM,



VMS (Voucher Management), Web Self Care.
- BI / Jasper Report Server, NMS Zabbix, Red Hat Enterprise Linux, Oracle.
- Key Responsibilities
- Develop, maintain and support Java-based telecom applications on the OpenCloud Rhino JAIN SLEE (JSLEE) application server.
- Configure, troubleshoot and enhance the SAP Convergent Charging (SAP CC) real-time charging / rating engine, including master data (charging plans, subscriber accounts) and integration with CRM, EAI and Oracle.
- Implement and maintain service logic and resource adaptors across SIP, Diameter, SS7/IN (CAPv2/MAP) and HTTP/REST/SOAP interfaces (e.g., IMS integration, routing configuration).
- Provide Level 2 / Level 3 support under the TSA – handle JIRA-based ticket escalations, meet SLA response times, and support 24x7 and special-event coverage (including oncall).
- Deliver change requests and enhancements, including MOP documentation and maintenance-window execution.
- Perform defect resolution, code reviews, integration testing and production deployments in Testbed and PROD environments via secured VPN access.
- Collaborate on solution design and technical documentation, and act as a technical point of contact for the customer and the distributed delivery team.

5.

Mandatory Technical

Skills

Core





- Senior-level Java development (8+ years) – backend, with solid OOP and design fundamentals.
- Hands-on experience with OpenCloud Rhino and JAIN SLEE application development.
- Proven experience with SAP Convergent Charging (SAP CC) – configuration, development and/or integration in a real-time charging context.

Telecom Domain & Protocols

- Convergent / online charging domain: rating, prepaid call control, CDR processing, subscriber account management.
- Telecom protocols: SIP, Diameter, SS7 / IN (CAPv2, MAP).
- Understanding of IVR / media handling and call-flow / routing configuration.

Platform & Tooling

- Oracle and SQL; Linux / Red Hat Enterprise Linux administration and troubleshooting.
- Build & version control: Maven, Git; ticketing with JIRA.
- Experience operating in production support (L2/L3), MOP execution and maintenance windows.
- Nice-to-Have / Desirable Skills
- Experience with Dialogic PowerMedia XMS, WebRTC or IVR platforms.
- EAI / integration layers, CRM (vTiger / PHP) and BI / Jasper reporting.
- Monitoring with Zabbix; automation/deployment with Chef or Ansible.
- IMS / SIP integration experience (e.g., Huawei IMS) and NGN/NGIN migration.
- Test automation frameworks (Robot Framework, JMeter, Seagull/SIPp).
- Soft Skills
- Strong problem-solving and solution-oriented mindset, suited to a support-driven environment.
- Good communication skills and direct customer-facing experience.
- Reliable under SLA pressure; able to handle on-call and special-event coverage.
- Team player, proactive, comfortable in a distributed, multi-country team.

📌 Senior Java Telco Lead (Karamba)
🏢 R Systems
📍 Karamba