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John Ndigirigi
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John Ndigirigi

Full-stack & AI Engineer · Nairobi, working remotely worldwide.

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© 2026 John Ndigirigi

Built with React + Vite + Tailwind

Work

Selected work

Products I've built and led, newest first.

Case studies

QuoteKamili: "Fast, accurate quotes from any customer request", with a faxed order turned into a priced quote and a delivery charge added.

Founder & Lead Engineer · Sep 2026 – Present

QuoteKamili

AI quoting for trade and industrial suppliers, from electrical and plumbing to building materials and metals. It turns emails, PDFs, scans and photos of handwritten lists into priced quotes in under a minute.

Read the case study

iOS · Android

ParentsChildrenCoaches

Expo React Native · RevenueCat

Mobile Lead · Toptal client · Jul – Aug 2026

Children's digital wellness app

iOS and Android app for parents, children and coaches. Led mobile in an 8-person team, built sign-in (one-time passcodes, Apple, Google) and RevenueCat subscriptions, and set up the release pipeline to TestFlight and Google Play.

Read the case study
Sociale's landing page beside a cooperative dashboard with members, deposits and recent transactions.

Lead Developer · Mar 2025 – May 2026

Sociale

Multi-tenant platform for savings groups and credit unions across Africa. I led the team and the architecture: PostgreSQL row-level security isolates every cooperative's data without per-tenant infrastructure. Shipped LLM agents for board reporting, risk analysis and a multilingual member assistant.

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Notamperdata's landing page: verify research data with blockchain.

Lead Developer & Maintainer · Mar 2024 – Feb 2026

Notamperdata

Open-source Google Workspace add-on, published on the Marketplace, that gives research data a tamper-evident audit trail. Only SHA-256 hashes leave Google's infrastructure.

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More projects

Identity Solutions Engineer · Jan – May 2026

DIGN

Integration and demo sites for enterprise partners on a KERI-based identity platform, covering supply chain provenance and onboarding against live AWS-hosted agents. Also wrote the partner integration docs and researched vLEI and GLEIF interoperability.

  • dign.id (DIGN site, opens in a new tab)
  • GitHub (DIGN code, opens in a new tab)

Software Engineer · Feb 2025

Blocktrust Workflow

No-code workflow platform in C# and .NET that lets organisations compose credential issuance, KYC verification and sign-in flows without writing code.

  • workflow.blocktrust.dev (Blocktrust Workflow site, opens in a new tab)
  • GitHub (Blocktrust Workflow code, opens in a new tab)

Lead Developer · 2025

Amana CE

Cardano platform for financial cooperatives, with an on-chain treasury, multi-signature governance and tokenised member instruments in Aiken. Award winner at the African Blockchain Championship 2025, Cardano track.

  • amana-dapp.vercel.app (Amana CE site, opens in a new tab)
  • GitHub (Amana CE code, opens in a new tab)
Earlier identity and Web3 work (9)
  • vLEI Chain Verifier

    Python CLI that verifies a vLEI credential against its full trust chain, up to the GLEIF root.

    Creator · 2026

    • GitHub (vLEI Chain Verifier code, opens in a new tab)
  • TokenWell

    Instant test-token minting on Cardano's Preview and Preprod testnets.

    Creator & Maintainer · Dec 2025

    • tokenwell.vercel.app (TokenWell site, opens in a new tab)
    • GitHub (TokenWell code, opens in a new tab)
  • DirectEd × CATS Aiken Workshops

    Self-paced Aiken smart contract course for CATS 2026 hackathon participants.

    Curriculum Author & Tutor · Oct – Dec 2025

    • GitHub (DirectEd × CATS Aiken Workshops code, opens in a new tab)
  • Cardano Common Scripts

    Common Cardano operations as runnable snippets, in both Lucid Evolution and cardano-cli.

    Creator & Maintainer · 2025

    • cardano-common-scripts.vercel.app (Cardano Common Scripts site, opens in a new tab)
    • GitHub (Cardano Common Scripts code, opens in a new tab)
  • Midrem

    Document-free identity and cross-border remittances with zero-knowledge proofs on Midnight.

    Creator · Jun 2025

    • midrem.vercel.app (Midrem site, opens in a new tab)
    • GitHub (Midrem code, opens in a new tab)
  • Blocktrust Badges

    Professional endorsements as verifiable credentials that expire automatically.

    Software Engineer · Sep 2024

    • badges.blocktrust.dev (Blocktrust Badges site, opens in a new tab)
    • GitHub (Blocktrust Badges code, opens in a new tab)
  • Blocktrust Credential Builder

    Fully client-side tool for creating DIDs and issuing verifiable credentials.

    Software Engineer · Jun 2024

    • credentials.blocktrust.dev (Blocktrust Credential Builder site, opens in a new tab)
    • GitHub (Blocktrust Credential Builder code, opens in a new tab)
  • Uvecert

    W3C verifiable academic credentials that students hold in their own wallets.

    Lead Developer · Mar 2024

    • uvecert.vercel.app (Uvecert site, opens in a new tab)
    • GitHub (Uvecert code, opens in a new tab)
  • DirectEd Platform

    Education platform training African developers in web development, blockchain and AI.

    Software Engineer · Feb 2024

    • directed.dev (DirectEd Platform site, opens in a new tab)
    • GitHub (DirectEd Platform code, opens in a new tab)