# Ralf Rantzau

> Software Engineer

Location: San Francisco Bay Area, United States
Profile: https://flows.cv/ralf

Passionate about Golang, databases (SQL, NoSQL), IOT, distributed systems, real-time analytics, and blockchain.

## Work Experience
### Software Engineer @ Verkada
Jan 2026 – Present | San Mateo, California, United States

### Software Engineer @ Self-Employed
Jan 2024 – Jan 2025 | San Francisco Bay Area

### Software Engineer @ Tradewing
Jan 2023 – Jan 2024 | San Francisco Bay Area
Customer data management to facilitate automatic payments
Product database redesign

### Senior Backend Engineer @ Lark Health
Jan 2021 – Jan 2022 | San Jose, California, United States
Micro-services and APIs to facilitate medical device integration

### Senior Software Engineer & Architect @ Passio Inc.
Jan 2021 – Jan 2021 | San Francisco Bay Area
Backend database engineering for edge AI service

### Senior Software Engineer @ Lacework
Jan 2020 – Jan 2020 | San Jose, California, United States
Backend database engineering for cloud security at scale

### Software Engineer @ Unknown
Jan 2019 – Jan 2020 | San Jose, California, United States
Stealth work

### Tech Lead - Blockchain platform @ Cisco
Jan 2018 – Jan 2019 | San Jose, California, United States
Cisco Blockchain is a permissioned enterprise blockchain with rich data structures
Enabled selective disclosure (field-level role-based access control) for ledger and state-store
Patents

### Tech Lead - Cloud telemetry and log analytics @ Cisco
Jan 2014 – Jan 2018 | San Jose, California, United States
Cisco Zeus SaaS - Database backend programming, built home-made BI reports and tools
Cisco Cloud Platform - Telemetry & logs crunching and plumbing using Apache Kafka, Apache Storm, and Cassandra
Cisco Cloud Center - More plumbing with containers
Patents

### Sr. Software Engineer - Real-time analytics @ Cisco
Jan 2012 – Jan 2014 | San Jose, California, United States
Cisco Connected Streaming Analytics (CSA) - Stream engine programming in C
Customer PoCs with Cisco CSA
ML algorithms integration into real-time analytics pipeline
Edge and fog computing - Analytics for IoT (retail, stadiums)
Patents & publications

### Software Engineer - Data stream engine @ Truviso, Inc.
Jan 2011 – Jan 2012 | Foster City, California, United States
Truviso TruCQ - Stream engine programming in C (think of PostgreSQL with data streams)
PostgreSQL query optimization

### Assistant Professor - Database systems @ Aalborg University
Jan 2010 – Jan 2011 | Aalborg, North Jutland, Denmark
Internet technologies
Renewable energy data management

### Software Engineer - Data stream engine @ Truviso, Inc.
Jan 2009 – Jan 2010 | Foster City, California, United States
Truviso TruCQ - Stream engine programming in C (think of PostgreSQL with data streams)
PostgreSQL query optimization

### Senior Software Engineer - RFID data management & BI @ IBM
Jan 2006 – Jan 2009 | San Jose, California, United States
IBM RFID Information Center - Database backend and middleware programming in Java
IBM Cognos - Data governance in data warehouses, SQL query optimization
Patents & publications

### Post-doctoral Scientist - Data privacy technology @ IBM Almaden Research Center
Jan 2004 – Jan 2006 | San Jose, California, United States
Hippocratic Database - Enforce privacy policies in relational database (DBMS agnostic)
Graph databases - Privacy technology for large multi-media streams
Search engines - Context-sensitive ranking of web search results
Patents & publications

### Teaching Assistant - DBMS implementation, BI, Data mining @ Universität Stuttgart
Jan 1999 – Jan 2003 | Stuttgart, Baden-Württemberg, Germany
Data mining / analytics - Algorithms, integration into database engine for high-performance crunching
Data warehousing / business intelligence (BI) - Database design, query optimization, performance tuning
Databases - Architecture, implementation, SQL, object-relational technology
Smart Factories - IT for digital production processes

### Assistant Lecturer - Databases @ Stuttgart Institute of Management and Technology (SIMT)
Jan 1998 – Jan 2000 | Stuttgart, Baden-Württemberg, Germany
Database systems


## Education
### Doctor of Philosophy (Ph.D.) in Computer Science
University of Stuttgart

### Master of Science (M.S.) in Computer Science
University of Stuttgart


## Contact & Social
- LinkedIn: https://linkedin.com/in/rantzau

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Source: https://flows.cv/ralf
JSON Resume: https://flows.cv/ralf/resume.json
Last updated: 2026-04-11