Skillhouse Internal Career Opportunity
L3 Support Lead - Telecom Billing Systems (Java: 7754)
Position Title:
L3 Support Lead - Telecom Billing Systems (Java: 7754)
Employment Type:
Haken
Working Hours:
Japanese Level - None,English Level - Advanced (TOEIC 860)
Salary
Description
A Global IT Service firm is seeking an experienced L3 Support Lead (Telecom Billing Systems) to join the Business Support System Operations Department.
This role is a senior, hands-on technical leadership position responsible for ensuring the stability, correctness, and reliability of the telecommunications billing platforms.
The successful candidate will act as a subject matter expert (L3 level) in Billing and Mediation domains, leading the resolution of critical production incidents and driving long-term improvements across complex BSS environments.
Responsibilities:
- Lead and personally drive the resolution of the most complex and high-impact production incidents affecting BSS billing systems, including Rating, Mediation, Payment, and Collection
- Own the end-to-end incident management process for billing-related issues, including escalation design, stakeholder communication, and post-incident reviews
- Strategically prioritize incidents based on business impact, customer experience, and revenue implications
- Champion problem management by identifying systemic issues, conducting in-depth Root Cause Analysis (RCA), and ensuring preventive measures are implemented
- Perform expert-level analysis of logs, databases, APIs, microservices, and application code to diagnose persistent and complex failures
- Identify architectural, design, or integration gaps and translate technical findings into actionable recommendations for engineering and product teams
- Design and implement data fixes, recovery procedures, and temporary workarounds while ensuring data integrity and accurate billing
- Design, lead, and enhance monitoring and alerting solutions (APM, infrastructure monitoring, synthetic transactions) to proactively detect system issues
- Drive and contribute hands-on to automation initiatives for operational tasks, diagnostics, and data repair
- Provide technical mentorship and guidance to L1 and L2 support engineers, strengthening overall support capabilities
- Act as the primary technical SME for BSS billing operations, collaborating closely with Product, Engineering, IT, and Network teams
- Lead technical discussions, represent the operations organization in architectural reviews, and influence future system design and enhancements
- Author and review detailed post-mortem reports, RCAs, runbooks, and advanced troubleshooting documentation
- Participate in a leadership-level 24/7 on-call rotation, directly engaging in critical incident resolution
Required skills:
- 8–10 years of experience in a senior technical role (e.g., Senior Software Engineer, Technical Lead, or L3 Support Engineer), preferably within the telecommunications domain
- 5+ years of hands-on Java development experience, building enterprise-grade systems in microservices or distributed architectures
- Strong, hands-on experience with Telecom BSS platforms, particularly Billing, Rating, Mediation, Payment, and Collection processes
- Proven experience with Couchbase and SQL databases, including data modeling, query optimization, performance tuning, and production troubleshooting
- Solid experience with DevOps tools and practices, including CI/CD (Jenkins), containerization (Docker), and Kubernetes-based deployments
- Demonstrated experience leading and executing Root Cause Analysis (RCA) for complex production incidents
- Experience collaborating with cross-functional teams such as Product, Engineering, Operations, and Network
- Experience with ITSM frameworks and tools (e.g., ServiceNow, Jira)
Why should you apply:
- This is a long-term opportunity with a chance to become a permanent employee
- You will be working with international team members
- Free breakfast, lunch and dinner at the cafeteria
Company Details:
A global company with a strong presence in multiple business areas. It has achieved sustained growth both domestically and internationally, including in the U.S. and Europe. The company boasts a diverse and international environment and is committed to equal opportunity, offering a wealth of career opportunities. Due to the diverse nature of our business, we handle a wide range of technologies! You can also choose the environment you are most comfortable with, such as Windows/Mac! Meals in the company cafeteria are also free. Our chefs are always coming up with new menu items, so you can enjoy your meal without getting bored!
Working hours: 9:00 - 17:30 (Mon-Fri)
Working Style: Hybrid (4 days in office, 1 day work from home)
Holidays: Saturday, Sunday, and National Holidays, Year-end and New Year Holidays, Paid Holidays, Other Special Holidays
Services/Benefits: Social insurance, DC Pension Plan, Transportation Fee, Skillhouse University, Test payback system, and more
