Lawrence Onwuli

Project: BAM - Operations & Maintenance Application

BAM is an O&M Application based on cloud-native generic and reusable services with additional services developed to serve BSS needs. A fully containerized enterprise microservices application. My Domain knowledge and expertise in supporting these microservices include the following:

• Message Bus Kafka/KVDB(Redis) Consumer APIs - for alarms handling and subscribers services.
• Apache zookeeper - centralized coordination service for distributed applications.
• Keycloak - providing REST APIs - Authentication and authorization of users and services. Supporting OAuth2, OIDC tokens for user/client authentication, UMA for OAuth2, and JWT.
• Prometheus servers - for collecting, aggregating and exposing performance monitoring data

As part of my role on the DevOps team, I am responsible for:

• Building and maintaining CI/CD pipelines for efficient application delivery across development, staging, and production environments.
• Creating and executing test process plans, establishing defect reporting techniques, and providing support for trouble report (TR) handling.
• Working closely with development teams to automate and streamline the release process.
• Providing operational support, including monitoring, diagnostics, and scheduled maintenance.
• Designing and automating the release verification process for BAM microservices.
• Building and maintaining robust monitoring and logging services for BAM deployments to proactively identify and resolve issues.
• Collaborating with teams to establish and refine the alerting and TR handling process.
• Managing TRs by reporting and coordinating them.
• Assessing and reporting on third-party package (3PP) deprecations for microservices and Helm charts.
• Coordinating the development of integration tests, optimizing reusable libraries, and developing and managing reporting systems.
• Reviewing and reporting on vulnerability assessments and testing analysis.
• Coordinating CI/CD support and reviewing staging pipeline charts.

Other Core Development Activities at BAM

• Developing the topology manager service to maintain application-specific Kubernetes resources inventory across clusters (GraphQL, Golang).
• Developing an application report generation and publishing tool (Python).
• Developing an object storage service to upload, download, and delete files in S3 for managing diagnostic data collection (Java).
• Developing a distributed trace service and application instrumentation (OpenTelemetry, Jaeger, distributed trace collector, and agent) (Java).
• Developing automation installation processes and tools for all BAM services.
• Creating release verification processes for microservices releases.
• Implementing mutual TLS for PostgreSQL and License Manager microservice tests.
• Reviewing and reporting on vulnerability assessments and testing analysis.
• Developing a non-functional verification pipeline to process user input through Jenkins and execute performance test cases for microservices.
• Automating the running of vulnerability analysis tests in TEAM microservices, enabling these tests to be executed as part of pre-submit/post-submit pipeline jobs.

Project: Support and Development for Ericsson Charging Monolithic Application

• Overview: Provided comprehensive support for a monolithic Ericsson charging application developed on virtual machines. Contributed to the cloud orchestration team with significant development and support efforts.

Key Responsibilities

• Cloud Orchestration and VM Management: Developed and extensively supported cloud orchestration tools, including VM management using vCenter (Java-based tools).
  Software Repository Management: Managed applications and repositories, ensuring efficient version control and deployment.
  Base Image Package Development: Created robust OS packages incorporating multiple network applications for enhanced system performance.
  Management Server Support: Developed and supported components for management servers, including performance management, fault management, and log management systems (using Filebeat, Logstash, and Elasticsearch).
  Test Automation: Designed and implemented test case automation using Jenkins and CI/CD tools, enhancing the testing process and reliability.
  Testing Library Creation: Developed a comprehensive testing library to ensure thorough testing of component interfaces.
  

Project: Development and Testing of Proprietary Data Object Store Solution

• Overview: Spearheaded the development and comprehensive testing of a proprietary data object store solution, ensuring high performance and reliability.
• Key Responsibilities:

End-to-End Test Development: Established and managed end-to-end test development, setup, and UAT reporting.
Configuration Management: Oversaw configuration management, version control, and file system protocol testing activities.
Data Center Setup: Developed and supported a big data test environment, including RAID configurations and cloud infrastructure.
Daily Scrum Participation: Actively participated in daily Scrum meetings, providing QA status updates and highlighting risks and delays.
User Guide Documentation: Reviewed, updated, and supported user guide documentation to ensure clarity and usability.
Security Monitoring: Conducted continuous monitoring and analysis of security threat information and event logs to maintain system integrity.

Project: SMS Content Delivery and Real-Time Stock Analysis

• Overview: Developed a solution for delivering SMS content to customers, enabling real-time analysis of stock with a 95% uptime.
• Key Responsibilities:Integration Testing Coordination: Coordinated test activities for integrating third-party solutions with the core application.
  Specification Review: Reviewed functional and technical specifications, developing comprehensive test strategies.
  Test Plan Implementation: Coordinated and implemented test plans, including execution and reporting.
  Trouble Report Management: Managed trouble report handling, resolution, and acceptance testing to ensure quality and reliability.
  

Project: Solution Delivery and Testing for MTN

• Overview: Led the development and testing efforts for MTN's solution delivery unit, ensuring high-quality delivery of products and services across various departments.
• Key Responsibilities:Requirements Development: Developed project requirements, including functional and technical specifications, for solution delivery.
  Functional Testing: Performed functional testing at every stage of solution development to ensure adherence to specifications.
  Test Strategy and Execution: Created test strategies, test plans, and test scripts, and coordinated test execution for system, integration, functional, regression, and user acceptance testing (UAT).
  System Requirements Validation: Validated system requirements for projects from various MTN departments, including CCE agents, post-paid and prepaid front/back offices, and help desks for both corporate and consumer clients.
  User Acceptance Testing: Conducted UAT for billing systems and new product development, ensuring products met user requirements.
  Environment Transition Coordination: Coordinated the transition of solutions from the testing environment to the live environment and ensured proper documentation for regression testing.