A 26-year career in telecom billing, reconciliation and Oracle/PL-SQL
People who understand tax rules, invoicing and reconciliation usually do not build
modern software. I spent 26 years on that side, and the past year on the other — this
page is the first half of that account.
Available for senior roles in São Paulo — on-site, hybrid or remote
Objective Solutions
Mar 1999 – Dec 2023 · 15 years as Senior Developer, around 10 as Consultant
Telecom billing — development and maintenance of the Diginet product
and its successor, Objective NG, in Smalltalk, Java and PL/SQL on Oracle.
Billing and Tax Data Warehouses — built in PL/SQL.
Tax, accounting and financial reconciliation — consulting on
reconciliation, including credit-card reconciliation for Adiq, a card acquirer.
Medical claims — focal point at PreventSenior, in healthcare.
4 end-to-end data migrations — Oi Cabo (100k subscribers), Compuserve
(35k), On (10k) and Netserv (10k).
Sky — when Sky moved off Diginet, the client's own migration team
asked for me to produce the reports covering their 1 million subscriber base.
Clients — Sky, Telefônica/Vivo, HughesNet, Netserv and PreventSenior.
Eleflow
2024 – 2025 · Senior Data Analyst
Data migration from Oracle to BigQuery.
Education
Universidade Presbiteriana Mackenzie
And then
The past year was the other side: two products shipped to production, built by directing
AI coding agents, with the architecture, acceptance criteria and verification my own.