Emanuel Alexandre T.

Sub-second performance on billion-row tables, vector search inside your database, and reports and AI answers your team can trust because they follow your business rules. Are your queries slowing down as data grows, or is your BI or AI layer giving answers your team no longer trusts? I'm a Senior DBA and Data Architect, Top Rated Plus with 100% Job Success. I fix the structure underneath: models, indexes, partitions and pipelines. Results clients hired me for - Raised sub-second queries from ~65% to ~90% on a billion-record SingleStore and SQL Server estate - Cut BigQuery costs by more than 90% on an AI pipeline enriching millions of records within SLA - Built an IoT pipeline ingesting thousands of sensors every 3 minutes, running for months with no manual intervention - Designed a governed Power BI semantic model that lets Claude answer business questions with approved metrics What clients say "We managed to get far more of our product developed than we had thought possible due to his wide range of skills and knowledge around all things data!" (SaaS dashboards and productization, $15K+ project) "He delivered exactly what we needed... and seamlessly navigated a number of complex data-engineering challenges along the way." (Power BI prototype, $6K+ project) "Worked very well. Excellent service and very knowledgeable." (SQL query work) Why clients bring me in My longest engagements started with a database problem, and the tool came second. One client hired me for SQL Server and later moved me to SingleStore at billion-record scale. Another brought me into an IIoT project on ClickHouse. What carries across systems is the judgment: how to model, index and partition, and where a design breaks once volume doubles. What I can do for you - Database performance: query tuning, execution plans, indexing strategy, partitioning, stored procedures - Databases: SQL Server, Oracle, MySQL, MariaDB, PostgreSQL, SingleStore, ClickHouse - Cloud and warehousing: BigQuery, Google Cloud (Cloud Run, Cloud Tasks, Cloud Scheduler), AWS, Azure, Microsoft Fabric - Data warehouse design, ETL/ELT, automated pipelines, API integration, Python, KNIME - Power BI semantic models, DAX, Power Query, row-level security; Looker and Looker Studio - AI-ready data layers: explicit definitions, KPIs and business rules, so AI answers from approved metrics at lower cost More projects - SaaS product analytics: Firebase/Firestore JSON into BigQuery, ETL routines and Power BI dashboards for usage, trials and conversion - Retail operations: POS data from a large U.S. restaurant chain through Python ETL on AWS into daily Power BI KPIs - Asset management: Python ETL, Reorg API, AWS and Power BI tracking liquidity, EBITDA and leverage with daily updates Background B.Sc. in Mathematics and MBA in Information Systems, both from PUC-SP. Power BI since 2016. Previously Business Intelligence Senior Manager at SPMS, Product Owner at Hitachi Vantara and Senior Project Manager at EuroBic. How we work together I own the problem from diagnosis through implementation, documentation and handover, and I explain the reasoning behind each decision. Based in Barcelos, Portugal, with overlap with U.S. business hours. Send me one slow query, one broken pipeline or one report your team stopped trusting, and I will tell you what I see before we discuss scope.