David Kobia

David Kobia

Head of Engineering · Principal/Staff Engineer · AI-Native Systems Architect

Hands-on engineering leader and full-stack builder who still ships production code. I architect and personally implement AI-native systems end to end - agentic workflows, retrieval and context engineering, LLM evaluation, backend services, infrastructure, and security. I move fluidly between writing critical code as an individual contributor and leading high-performing teams, and I have a track record of taking ambiguous problems to scaled, production-grade products used by hundreds of thousands of people.

01Work

Trustworthy

AI-native consumer platform that organizes, secures, and answers questions about families' most sensitive information.

Architect and lead builder of the AI systems behind The Family Operating System®: agentic document workflows, grounded document Q&A over families' most sensitive information, and the evaluation and rollout discipline that gates every LLM release - Head of Engineering, still hands-on in the most critical parts of the codebase.
  • Document Classification & Extraction
  • Workflow State Management
  • Retrieval & Chunking
  • Vector Search & Embeddings
  • Prompt & Context Engineering
  • Text-to-Speech & Speech-to-Text
  • Automated Evals
  • Human-in-the-Loop Review
  • Observability
  • Evaluation Harnesses
  • SOC 2
  • Encryption
  • Pen Testing & Bug Bounty

Kidplay Technologies

A portfolio of consumer parenting apps with over 500,000 combined downloads, built solo.

Built to solve my own problems as a busy parent - potty training, chores, pets, carpooling, sick kids - Kidplay grew into a portfolio of five shipped apps (Doggy Time, Potty Whiz, Chore Boss, Kid Hop, Fever Whiz) with 500,000+ downloads and $100K+ ARR three years running. Sole engineer, designer, and operator, owning the entire stack: cross-platform mobile (iOS, Android, watchOS), backend, sync infrastructure, cloud, analytics, and support.
  • Flutter
  • Swift / watchOS
  • Android / wearOS
  • LLM-Generated Insights
  • Chat With Your Data
  • Text-to-Speech & Speech-to-Text
  • Ruby on Rails
  • Cross-Device Sync
  • Autoscaling
  • Zero-Downtime Deploys
  • CI/CD
  • Observability
  • Backups & Disaster Recovery
  • Cost-Efficient Scaling
  • Subscriptions
  • Analytics

StreamLabs Water Monitoring

Smart-home water-monitoring platform sold at Home Depot, Lowe's, Best Buy, and Amazon.

Architected, designed, and implemented a scalable system serving tens of thousands of users and hundreds of thousands of connected devices, including third-party APIs serving enterprise customers.
  • Connected Devices
  • Real-Time Telemetry
  • Event-Driven Systems
  • Scalability & Performance
  • REST APIs
  • Partner Integrations
  • DevOps Automation
  • Cost Optimization

Ushahidi

Open-source crisis-mapping platform used in 100+ countries, reaching 20M+ people.

Co-founded and led the global team delivering open-source web and mobile technologies translated into 30+ languages, for clients including the United Nations.

  • SMS Integration
  • Web & Mobile Apps
  • Geospatial Mapping
  • Real-Time Visualization
  • Open-Source Community
  • Localization (30+ Languages)

02Open Source

  • Offline TL;DR

    Browser extension that summarizes web pages using local LLMs (Ollama, LM Studio, llama.cpp). Nothing leaves your device.

  • Moiré

    Divergence detection for AI browser agents: catch hidden prompt injection, quarantine it, enforce policy before actions execute

github.com/dkobia ↗

03Experience

Head of Engineering / Trustworthy

2020 - Present

AI-native consumer platform ("The Family Operating System®") that organizes, secures, and answers questions about families' most sensitive information.

  • Architect and personally build core AI systems - designed and implemented the RAG pipeline that turns unstructured family documents into accurate, grounded answers, including retrieval, chunking, embedding, and context-design strategy.
  • Built agentic workflows and state management that autonomously classify, extract, link, and file documents and drive AI-generated outcomes for customers.
  • Designed an LLM output evaluation and quality-control framework - automated and human-in-the-loop evals to measure accuracy, catch regressions, and gate releases of AI features.
  • Own advanced prompt engineering and context design across the product, and built internal AI tooling for assisted project management and delivery forecasting.
  • Established LLMOps/MLOps practices - versioning, evaluation harnesses, observability, and safe rollout for LLM-driven features in production.
  • Drive a security-first engineering posture in a product handling highly sensitive data: own SOC 2 audits, coordinate third-party penetration testing, run a bug-bounty program, and design encrypted, privacy-preserving data architecture.
  • Lead the engineering organization - hiring, technical strategy, architecture, and standards - while remaining hands-on in the most critical and complex parts of the codebase.

Founder & Principal Engineer / Kidplay Technologies

2022 - Present

Independent venture - five consumer parenting apps built from problems in my own home, sustaining $100K+ ARR three years running across 500,000+ downloads.

  • Sole engineer, designer, and operator of a multi-app portfolio (Doggy Time, Potty Whiz, and more) with over 500,000 combined downloads - owning the entire stack solo: cross-platform mobile (iOS, Android, watchOS), backend, sync infrastructure, cloud, analytics, and support.
  • Demonstrates sustained ability to take products from concept to scaled, revenue-generating release as a pure individual contributor.

Engineering Manager / Lab1886 (Daimler / Mercedes-Benz)

2018 - 2019

Daimler's corporate innovation incubator - prototyping, validating, and building new digital ventures across the mobility space.

  • Served as full-stack developer and technical lead on rapid proofs of concept, owning architecture and technology stack decisions.
  • Performed technical validation of startup ventures and stood up engineering teams to take concepts forward.

Principal Systems Architect / StreamLabs (Reliance Worldwide)

2016 - 2020

Smart-home water-monitoring hardware + software platform; product now sold at Home Depot, Lowe's, Best Buy, and Amazon.

  • Architected, designed, and implemented a scalable system serving tens of thousands of users and hundreds of thousands of connected devices.
  • Designed and built third-party APIs serving enterprise customers, and led performance, scalability, and cost-optimization work.
  • Built and led a cross-functional engineering team (backend, embedded, mobile, frontend, QA, DevOps) and drove automation across solution delivery.

Director of Software / BRCK

2014 - 2016

Rugged, self-powered connectivity hardware + software for low-infrastructure environments.

  • Led planning, design, development, and deployment of firmware and cloud software powering a remotely managed mobile WiFi hotspot.
  • Delivered an education-technology platform and a content management / distribution network for streaming media from edge devices.
  • Built and led a globally distributed hardware and software engineering team.

Director of Technology & Co-Founder / Ushahidi

2008 - 2014

Open-source crisis-mapping and crowdsourcing platform used worldwide.

  • Built and led a global team delivering open-source web and mobile technologies used in 100+ countries, translated into 30+ languages, reaching 20M+ people.
  • Delivered solutions for clients including the United Nations, U.S. Southern Command, and Conservation International.
  • Advised and helped launch spin-off organizations including iHub (Nairobi's technology innovation hub) and Gearbox (a hardware-entrepreneur ecosystem).

04About

The best things I've built started selfishly - a problem of my own I couldn't leave alone. Solving it well usually meant I'd accidentally solved it for a lot of other people too. That instinct has kept me in startups my whole career: small teams, outsized problems, and the shortest possible distance between noticing something broken and shipping the fix.

05Toolkit

AI / ML

  • RAG
  • vector search & embeddings
  • agentic workflows
  • LLM evaluation
  • prompt & context engineering
  • LLMOps/MLOps
  • AI workflow orchestration
  • text-to-speech & speech-to-text

Languages

  • Python
  • Ruby
  • TypeScript / JavaScript
  • Go
  • Swift
  • Kotlin
  • Dart
  • Java
  • C

Backend & Web

  • Ruby on Rails
  • Django
  • Node.js
  • React
  • Next.js
  • REST/GraphQL APIs
  • microservices
  • event-driven systems (Kafka, Kinesis)

Data

  • PostgreSQL
  • DynamoDB
  • Redis
  • vector databases
  • Elasticsearch

Cloud & DevOps

  • AWS
  • Azure
  • Google Cloud
  • infrastructure-as-code
  • CI/CD
  • containerization
  • observability

Security

  • SOC 2
  • HIPAA
  • GDPR
  • encryption
  • secure data architecture
  • threat modeling
  • penetration testing
  • bug-bounty programs

Mobile

  • iOS / Swift
  • Android / Kotlin
  • Flutter
  • React Native
  • watchOS
  • cross-platform sync

06Education

Computer Science / University of Alabama at Birmingham

Recognition

  • MIT Director's Fellow
  • MIT Technology Review TR35 (Top Innovator Under 35)
  • MIT Technology Review Humanitarian of the Year
  • Fast Company Most Creative People in Business
  • Knight-Batten Award for Innovation in Journalism

07Contact

david@kobia.me