Evgenii Timofeev

The process for migrating Base Operator (a part of Telenet Belgium) customers from a legacy system to a NetCracker real-time billing and rating management system.

I was an OCS (online charging system) migration team lead, came into the project when the migration design was almost finished. However, due to numerous product code changes, the design had to be changed several times dramatically. Also, because of the absence of OCS migration business analysts, I had to proactively communicate with the product implementation team and the customer, performing analysis and design by myself to create and split implementation tasks between team members.
I was also responsible for executing SVT tests, analyze results, and find ways to improve performance in all parts of the OCS migration ETL—Oracle PL/SQL scripts for data extraction and preliminary transformation, Java/Kotlin application for data transfer, and Grafana logs for monitoring Apache Cassandra load.
From the people management perspective, I was doing all the regular team lead activities: tasks decomposition, distribution and control, delivery planning, new features assessment, and ETA calculation.

Successful migration of Australian Optus operator's OSS systems to the NetCracker TOMS engine.

As a senior developer, I've created transformation, validation, and reconciliation scripts for millions of records to be processed and uploaded into the EAV data model during migration. A huge part of this work was Oracle SQL tuning and PL/SQL scripts development for matching customers' NFRs for migration timeframes.
After the migration, I continued to work on this project as a post-migration support team lead, distributing data fixes between team members and working with the customer's data extract team on new data integration CRs (customer requests).

This project focuses on the management and orchestration of CJSC "NSS" (Nizhny Novgorod Communications) statistics system migration into the "Tele2 Russia" informational system. This migration was necessary after the sale of RosTeleCom PJSC's mobile assets to Tele2 Russia LLC. Our primary objective was to align the analytical and reporting system of CJSC "NSS" with the standards set by Tele2.

I led a team of analytical reporting developers responsible for the migration process. We aligned the systems by conducting system comparisons, collaborating with Tele2 data development and marketing teams to ensure mapping and ETL design, determining hardware requirements, performing data validation and performance checks, coding and executing ETL processes, and providing post-migration support.