Ziva
Nutrition tracking through conversation. Describe a meal in Claude or ChatGPT and Ziva resolves it to USDA food data with a detailed nutrient breakdown.
Role: Creator · Solo developer
T7 Workstation · safe mode
Tomislav Markovski
Senior Cloud Architect & Consultant
About me
Based in Miami. I build practical generative AI applications, especially for document processing, search, and complex business workflows. I spend a lot of time on the systems around the models — durable orchestration, distributed services, and cloud infrastructure, mostly on Azure. I also have years of experience building identity platforms and working with applied cryptography, open standards, and secure systems.
Portfolio
Longhand
Neural handwriting synthesis for web and mobile. Longhand turns typed text into expressive, human-looking handwriting.
Role: Creator
Argus · DBOS workflow viewer
A self-hosted, read-only dashboard for understanding durable workflows in DBOS Transact applications. Point it at Postgres or SQLite and inspect workflow state without app-side wiring.
Role: Author
Very Good Wallet
A digital credential wallet where your passkey is the wallet — no seed phrase, no server-side custody; the entire key hierarchy is derived from the passkey PRF. Showcases the full trust triangle with OID4VCI issuance, OID4VP presentation, BBS selective disclosure, and zero-knowledge predicate proofs for private age verification.
Role: Creator · Solo developer
Ziva
Nutrition tracking through conversation. Describe a meal in Claude or ChatGPT and Ziva resolves it to USDA food data with a detailed nutrient breakdown.
My role: Creator · Solo developer
Built with: SvelteKit · Python · .NET · MCP · Azure · Cosmos DB · GPT-4o
Longhand
Neural handwriting synthesis for web and mobile. Longhand turns typed text into expressive, human-looking handwriting.
My role: Creator
Built with: Neural synthesis · Web · Mobile · Handwriting generation
Argus · DBOS workflow viewer
A self-hosted, read-only dashboard for understanding durable workflows in DBOS Transact applications. Point it at Postgres or SQLite and inspect workflow state without app-side wiring.
My role: Author
Built with: Python · FastAPI · DBOS · PostgreSQL · SQLite · Docker
Very Good Wallet
A digital credential wallet where your passkey is the wallet — no seed phrase, no server-side custody; the entire key hierarchy is derived from the passkey PRF. Showcases the full trust triangle with OID4VCI issuance, OID4VP presentation, BBS selective disclosure, and zero-knowledge predicate proofs for private age verification.
My role: Creator · Solo developer
Built with: Passkeys · WebAuthn PRF · Verifiable Credentials · OID4VCI/OID4VP · BBS Signatures · Noir ZK proofs · Cloudflare Workers
Hyperledger Aries .NET SDK
A .NET framework for decentralized identity applications and standards-based credential exchange.
My role: Author · Maintainer
Built with: .NET · Hyperledger Aries · Verifiable Credentials · Decentralized identity
did-key.rs
A Rust implementation of the did:key method for creating and resolving identifiers derived from cryptographic key material.
My role: Author · DIF contributor
Built with: Rust · Cryptography · DIDs · Decentralized Identity Foundation
BBS Signatures
A Rust implementation of the BBS signature scheme, including selective disclosure and zero-knowledge proof capabilities.
My role: Author · IETF contributor
Built with: Rust · Cryptography · BBS · Zero-knowledge proofs · IETF
ethereum-key-vault
A focused library for managing Ethereum key material with Azure Key Vault.
My role: Author
Built with: Ethereum · Azure Key Vault · Cryptography
Open source
- Hyperledger Aries .NET SDK — A .NET framework for decentralized identity applications and standards-based credential exchange.
- did-key.rs — A Rust implementation of the did:key method for creating and resolving identifiers derived from cryptographic key material.
- BBS Signatures — A Rust implementation of the BBS signature scheme, including selective disclosure and zero-knowledge proof capabilities.
- ethereum-key-vault — A focused library for managing Ethereum key material with Azure Key Vault.
Experience
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Nimble Gravity · Engineering Manager 2024 — now
Gen AI applications, intelligent document processing, durable workflows, and Azure cloud systems.
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Trinsic · Co-Founder & CTO 2019 — 2024
Built and led engineering for decentralized identity infrastructure, developer platforms, and mobile products.
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BlueMetal / Insight · Senior Architect 2016 — 2019
Enterprise cloud architecture and mobile applications across public safety, healthcare, finance, and trading.
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Infusion / Avanade · Senior Consultant / Senior Software Engineer 2014 — 2016
Enterprise mobile and web applications for education and finance.
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Seavus · Senior Web Developer 2012 — 2014
Front-end systems for large datasets and developer tooling.
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Various consultancies · Software Engineer 2002 — 2012
Full-stack work across healthcare, enterprise software, and e-commerce.
Skills
Languages
C# · TypeScript · JavaScript · Python · Rust · Go · Swift · Kotlin · F#
AI & applications
Generative AI · RAG · Semantic Kernel · DBOS · Intelligent document processing · Workflow automation
Cloud & systems
Azure · Kubernetes · Docker · PostgreSQL · Cosmos DB · gRPC · KEDA · Terraform · Bicep
Identity & security
OpenID Connect · WebAuthn · Verifiable Credentials · DIDs · BBS Signatures · Zero-knowledge proofs
Architecture & leadership
Distributed systems · Cloud architecture · Team leadership · Mobile development · Open standards
Contact
If you are working on a hard systems problem—or just want to compare notes—say hello.