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@Mises @fee-org @Jellyfish-Insights @sapan-ai @Paytech-Labs

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davidveksler/README.md

David Veksler: Applied AI / Principal AI Engineer

Frontier-model deployment · AI governance & observability · agentic engineering · regulated fintech

I get frontier models into production in places where the regulatory and security bar is high. Anyone can demo an agent. The hard part is the substrate underneath: review gates, observability, permission boundaries, and a hard rule that AI never touches the system of record.

Some things I've built:

  • The AI delivery function at a regulated commercial lender, from zero: a skill marketplace, a publish-and-audit governance gate, drafts-only by default, cost-per-skill observability. The first time one skill ran in front of the team, it was about to ask a broker for a borrower's SSN. What we changed after that is the interesting part: davidveksler.com/david/ai-strategy.html
  • Agentic engineering at enterprise scale at Antech. Claude Code and Copilot workflows that built a support platform end to end and automated unit testing, a 4.2x velocity increase.
  • A decade in regulated fintech and digital assets before that: CCSS Level 3 custody, wrapped tokens at $100M+ TVL, and recovery tooling that scanned vaults across 20+ EVM networks to bring back $4M+ in stranded assets.

~20 years of engineering, principal/staff level. C#/.NET, Python, TypeScript/React, Azure, AWS, SQL, OpenTelemetry. I reach for frontier models plus retrieval before fine-tuning, almost every time.

I don't train models and I'm not a prompt engineer. I'm the person you bring in when the demo worked and now it has to survive compliance.

Reach me: heroic@gmail.com · LinkedIn · Substack

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  1. CryptAByte CryptAByte Public

    Free, open-source C#/.NET toolkit for secure encrypted message and file sharing over the web using public-key infrastructure (RSA, AES-256, SHA-256). Includes CryptoPad and OneTimePad utilities.

    C# 34 7

  2. Crypto-Portfolio-Tracker Crypto-Portfolio-Tracker Public

    Cross-platform cryptocurrency portfolio tracker (.NET console app) for real-time Bitcoin & Ethereum wallet balances via xpub/zpub, CoinGecko prices, and Electrum servers.

    C# 2

  3. Jellyfish-Insights/andromeda Jellyfish-Insights/andromeda Public

    Don’t be held hostage by other providers. Own and aggregate your data from organic and paid campaigns in a single place to pull and review as needed

    C# 11 5

  4. Fireblocks-Raw-Client Fireblocks-Raw-Client Public

    TypeScript scripts for sending raw transactions via the Fireblocks API — crypto custody operations for unsupported tokens and hidden vaults on EVM and Bitcoin-like chains.

    TypeScript 1 1

  5. LLMCraftedBlazorSamples LLMCraftedBlazorSamples Public

    Blazor and C# code samples, components, and utilities for ASP.NET Core apps — generated with the assistance of Claude AI (LLM-generated code samples)

    HTML 3 1

  6. CodeContext CodeContext Public

    CLI tool & MCP server that turns a codebase into text for an LLM to see its context — feed code to ChatGPT, Claude, or any AI coding assistant

    C# 20 3