Sr Developer/ Lead – IBM i / AS400 Enterprise Wireline Billing Systems

Sr Developer/ Lead – IBM i / AS400 Enterprise Wireline Billing Systems

This role is responsible for supporting and enhancing IBM i / AS400 applications in a

telecommunications billing environment. It requires strong technical depth, sr. development

capability, and the ability to manage own estimation, planning, development, technical delivery,

production support, and transition risk across a legacy application landscape.

Experience working with telecommunications enterprise billing systems, including Billing,

Rating, Message Processing, Accounts Receivable, Ordering, and system integrations

using web services and MQ.

Proficiency with IBM i development and support tools, including VS Code, GitHub

Copilot, RDi, Implementer (MKS), Hawkeye, and PKENCRYPT/PKZIP, for

development, code promotion, impact analysis, troubleshooting, and environment

management.

Strong documentation, impact analysis, and solution design capability, including

technical specifications, process flows, data mappings, and operational procedures.

Strong communication, and stakeholder management skills, with the ability to lead junior

developers, manage priorities, follow development standards, perform peer reviews,

maintain delivery discipline, and ensure effective ongoing knowledge transfer and

operational readiness across business, QA, Operations, and other teams.

Requirements

Key Requirements:

Must-Have Expectations:

8+ years of IBM i / AS400 experience, including recent hands-on Sr. Developer responsibilities.

Strong capability in RPG/RPGLE, CL/CLLE, SQL, DB2 for i, batch processing, and legacy

application support is required. Experience in telecommunications billing environments is

strongly preferred. Strong estimation, planning, and technical delivery management capability is

required. The successful candidate must be able to ramp up independently, work effectively with

limited transition support, and collaborate with business, QA, Operations, and cross-functional

teams.

Resource must be eligible to apply for GoC Clearance

Core Responsibilities:

Own IBM i applications across project development, maintenance, production support,

and stability of existing RPGLE-based solutions.

Analyze business and technical requirements, perform impact assessments, prepare

solution designs, and deliver changes in alignment with SDLC standards.

For smaller projects provide technical design, estimation, delivery planning, code

reviews, design, and enforcement of coding, documentation, and change management

standards.

Support testing, deployments, and production issue resolution through defect

investigation, root cause analysis, validation, and post-release support.

Provide ongoing knowledge transfer and operational handover support to Operations,

QA, and dependent teams to ensure readiness for deployments, support, and

maintenance.

Manage transition risk by identifying knowledge gaps, improving documentation,

establishing sustainable support ownership, and maintaining delivery continuity.