João Vitor
Martins
// data architecture & engineering
I transform data into strategic decisions. With over 10 years of experience, I help companies build robust data infrastructures that generate real business impact.
About
Nice to meet you! You can call me JV.
I've been working with data for over 10 years, and if you take a closer look at my profile, you'll find a wide range of valuable experience across different industries - from healthcare and pharma to automotive and manufacturing.
Today I'm Lead Data Engineer at Vantora (formerly UP.Labs), an Enduris venture, where I own the product's engineering and data platform on Azure Databricks. I also run my own consulting company, DadosNow, where I help companies like Sabesp and Shell/Prime Energy turn their data into a competitive advantage, backed by 10+ years of hands-on data architecture and engineering.
Beyond data infrastructure, I also build AI-powered products. JARVIS is a live example — an AI personal assistant with persistent memory, multi-model support (GPT, Claude, Gemini) and WhatsApp integration, built entirely from scratch. I believe the future of data engineering is inseparable from AI — and I'm already building it.
My expertise spans Data Architecture, Data Engineering, BI & Analytics, and Cloud Solutions. I've worked with companies like Medtronic, Novartis, Sabesp, Shell/Prime Energy, Hospital Sírio-Libanês, Embraer, Ford, and Fleury.
I hold an MBA in Data Science and AI from Sirius Educação (2024–2025).
Languages
Stack & Skills
Experience
Projects
JARVIS — AI Personal Assistant
A complete AI personal assistant with persistent memory across conversations, multi-model support (GPT, Claude, Gemini), document uploads and WhatsApp integration. Built from scratch and live in production.
usejarvis.app →
JV Platform — AI-Powered Career Management
Full-stack platform that manages my entire career: AI avatar interviews (voice + lip-sync), blog CMS, finance tracker, kanban boards, Google Calendar, analytics dashboard, and lead qualification — all with Claude AI integration.
→ Live at mrtinsjoao.com — this very site
Sabesp: Legacy-to-SAP Migration Engine
Designed the engine that moves Sabesp's entire transactional system from its legacy platform into SAP on Azure Databricks (Delta, Unity Catalog, Workflows, Asset Bundles), with a delivery workflow integrated across Databricks, GitLab and Jira.
→ Migration engine for a 2-year program
Prime Energy: Unified Lakehouse on AWS Databricks
Unified 6+ internal systems and SAP Datasphere data products of a Shell Group company into one governed Medallion lakehouse with APIs on Databricks, Power BI integration, Terraform, GitHub deployments and Asset Bundles with dev/prod targets.
→ Lean, highly available data platform
Global Data Platform - Snowflake
Led implementation of enterprise data platform at Novartis, integrating global data sources and enabling cross-system analytics.
→ Unified data access for global teams
Data Lake Architecture - AWS
Designed the complete technical solution and led the implementation of a new Data Lake architecture for Solidaridad.
→ End-to-end technical design and implementation
Fleury + Pardini Merger
Led the restructuring and unification of Qlik Sense and Qlik Cloud environments after the merger.
→ Unified analytics environment post-merger
MFA Server Consolidation
Successfully unified 48 Active Directory MFA servers into a single environment at SONDA/Embraer.
→ Delivered in 5 days (planned for 3 months)
Ford LATAM Analytics
Developed unified KPI dashboard for dealerships across Brazil and Argentina.
→ Analytics for global teams BR/AR
Cloud Migration AWS to OCI
Led intercloud server migration from AWS to Oracle Cloud Infrastructure at Hospital Sírio-Libanês.
→ Seamless migration with high availability
Blog & Articles
view all →How I built a complete AI personal assistant from scratch — persistent memory, multi-model support (GPT, Claude, Gemini) and WhatsApp integration. From idea to production.
How I leverage Microsoft Dataflows to centralize queries, reduce costs on Databricks/Snowflake, and enable governance.
How I reduced a Power BI Dataflow load time from 8 hours to just 6 minutes.
A consulting case where data divergence caused trust issues. The solution: a complete Data Lake redesign.
Trusted By
Companies I've worked with
How We Can Work Together
Flexible partnership models to meet your needs
Why work with me?
+10 Years Experience
Extensive experience across healthcare, pharma, automotive, and manufacturing industries.
Enterprise Track Record
Delivered projects for Medtronic, Novartis, Embraer, Ford, Fleury, and Hospital Sírio-Libanês.
End-to-End Solutions
From Data Architecture to BI & Analytics - complete data solutions that drive business value.
Global Experience
Working with global teams, multilingual (PT/EN/ES), and understanding of international business.
Ready to transform your data into results?
Let's talk about how I can help your business grow with data.