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Djfferson Schlemper
Looking for a jobSoftware Engineer (Dados)
Senior Data Engineer with 13+ years in tech, specializing in SQL Server performance, ETL and BI for high-volume fintech platforms.
BrazilSoftware Engineer (Dados) at Dock
Experience
Software Engineer (Dados)
Fintech BaaS platform (70M active accounts, 11 countries). Owned SQL Server performance for cards, accounts and Pix. Cut billing cycle runtime 75% (200→50 min) by isolating inactive accounts in a pre-processing procedure. Re-engineered campaign loading: 53–93% faster per issuer (179→14 min). AI-assisted int→bigint/smallmoney→money migrations: 5→2 days. Data archiving.
Data Analyst
Developed and deployed BI solutions on the UpQuery BI platform for clients across multiple industries. Optimized SQL queries over large analytical databases, reducing report load times. Built ETL processes integrating multiple data sources and administered Oracle databases for BI. Worked with business teams to turn data into decision-ready information.
Analista de Desenvolvimento II
Developed and optimized complex SQL Server procedures, triggers and queries for a fintech BaaS platform (cards, accounts, Pix). Tuned indexes for faster response times, handled backup, restore and monitoring. Key project: migrated annual fee data for 13M accounts of a banking client, validated via reconciliation with the client and sample checks.
Senior Business Intelligence Analyst
Implemented BI (ETL, Data Warehouse, dimensional models, dashboards) for companies in transportation, manufacturing, food, healthcare supplies, packaging and textiles. Key project: end-to-end BI for a carrier with 5,000 employees, 30 DCs and 5M deliveries/year, with dashboards for operations, HR, costs and financial results.
Desenvolvedor C#
Developed and maintained C#/.NET applications integrated with SQL Server. Implemented business rules and database integrations, translated business requirements into technical solutions with cross-functional teams, evolved legacy systems for stability and performance, and worked with QA to fix production issues.
Técnico de Infraestrutura
Administered Windows and Linux servers and workstations: installation, configuration and maintenance. Diagnosed network and connectivity issues, provided remote and on-site IT support, installed and maintained hardware and network infrastructure, and documented operating procedures.
Education
Esucri
Bachelor's degree in Information Systems from Esucri, completed in 2014.
Bachelor's degree in Information Systems from Esucri, completed in 2014.