Timo von Holtz
Summary
Building reliable backend systems for public-safety software. I care about systems that hold up when it matters — clear contracts, honest trade-offs, and code other people can live with.
Experience
Each role includes queryable AI context — the real story behind the bullet points.
Emergency communications platform deployed across 1,000+ agencies in 49 states. Originally built by Prepared — acquired by Axon in October 2025 and now operating under the Axon 911 umbrella.
Senior Software Engineer
Apr 2025 – Present- Built multiple radio vendor integrations, covering the >90% of digital radio vendor market share.
- Implemented P25 audio decoding using the DVSI Hardware Vocoder via direct serial connection, enabling real-time processing of Motorola radio traffic.
- Improved radio transcription quality by 40% through audio pipeline optimizations.
- Developed live playback for incoming radio transmissions using Kafka and LiveKit.
- Built the foundation of a Chat Assistant, allowing supervisors to query incident statistics with ease.
Cloud data API platform that auto-generates REST and GraphQL APIs from database schemas. Seed-stage, ~12 person team.
Senior Software Engineer
Nov 2023 – Apr 2025- Designed and built usage tracking and usage-based billing using Lago and Stripe, establishing the company's first monetization infrastructure.
- Integrated Authzed (based on Google Zanzibar) to replace ad-hoc permission checks with a scalable, auditable authorization system.
- Designed and implemented the Access Policies system, enabling granular access control for API consumers.
- Built a user authentication system supporting social auth providers for customer-facing applications.
- Developed core platform capabilities for Neurelo Connect, enabling secure, AI-driven database access for AI agents.
formerly medilyse GmbH, factis research GmbH
Digital clinical assistant software for hospitals across Germany (iPad-based clinical workflows, Checkpad MED). Deployed in large hospital networks.
Product Platform Architect
Aug 2020 – Oct 2023- Led the development of a Flutter-based patient app that became central to the product portfolio.
- Rearchitected internal services for horizontal scaling, enabling deployment across large hospital networks.
Senior Software Engineer
May 2019 – Jul 2020- Optimized EventStore database queries, significantly reducing downtime and improving system reliability.
- Built a dynamic forms framework for structured clinical data collection across hospital workflows.
- Maintained and evolved a custom Haskell build system based on Shake.
Software Engineer
Mar 2016 – Apr 2019- Built a data export platform implementing IHE, DICOM, and HL7 healthcare interoperability standards.
- Developed HL7 integrations with external hospital information systems.
- Migrated databases from SQLite to PostgreSQL, improving performance and scalability for production workloads.
- Led adoption of Git, replacing Darcs as the team's version control system.
Anchor Hosting
2014 – 2015 · Sydney, AustraliaSoftware Engineer
Oct 2014 – Dec 2015- Built internal tooling in Haskell, improving development efficiency.
- Developed an OAuth2 server in Haskell for secure, internal service authentication.
- Contributed to open-source projects like Servant.
Education
Master's Degree · Computer Science
Thesis: Generating LLVM IR using Template Meta Programming in Haskell
Visiting Research Student
Bachelor's Degree · Computer Science
Languages
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