Siegfried Bozza Full-Stack Web3 Engineer

Selected work

• 

  LabsTrail

  Traceable Paper Ratings on the OriginTrail DKG and Base Sepolia

  Open ratings for life-science papers, under construction: evidence on the OriginTrail DKG, scores on Base Sepolia, and every write safe to retry.

  • Next.js
  • TypeScript
  • Solidity
  • Foundry
  • OriginTrail DKG
  • Inngest
  • +14

  View Case studyView Live demo
• wallet-watcher · Sepolia

  [poller] wallet #0: outflow -523183071527000 wei (mined, tx 0x6e8e…)[poller] wallet #1: inflow 500000000000000 wei$ curl -s http://127.0.0.1:3000/wallets/0/ledger{"index": 0,"entries": [{ "type": "initial", "deltaEth": "0" },{ "type": "inflow", "deltaEth": "0.001" },{ "type": "outflow","deltaEth": "-0.000523183071527","balanceAfterEth": "0.000476816928473","txHash": "0x6e8ec949…5ad1e4a0" }]}

  Wallet Watcher

  Withdrawals Booked From Their Receipts

  Custody backend slice on Sepolia: HD wallets, an append-only ETH ledger, and EIP-1559 withdrawals booked from their receipts.

  • TypeScript
  • Node.js
  • viem
  • Hono
  • SQLite
  • Zod
  • +1

  View Case studyView GitHub
• 

  BioVerify

  Agentic DeSci Peer-Review Case Study

  DeSci peer-review case study on Base Sepolia and Ethereum Sepolia: Next.js + TypeScript + Solidity + Chainlink + LangGraph + Inngest.

  • Next.js
  • TypeScript
  • Solidity
  • Foundry
  • Chainlink
  • LangGraph
  • +18

  View Case studyView ArticleView Live demo
• 

  Bet2Gether

  Chainlink-Settled Prediction Market

  Solidity prediction pools with Chainlink Price Feeds, Automation, and VRF; rounds go from Active to Resolved on an Automation upkeep, on Ethereum Sepolia (Next.js + TypeScript + wagmi + Tenderly). Has a known payout bug, listed under Known limitations.

  • Next.js
  • TypeScript
  • Solidity
  • Foundry
  • Chainlink
  • OpenZeppelin
  • +12

  View Case studyView Live demo
• 

  Forge

  Atomic ERC-1155 Crafting

  ERC-1155 crafting case study on Ethereum Sepolia: burn-then-mint for composites in one call, a rules contract that owns the token ledger, and 38 Foundry tests (Next.js + TypeScript + wagmi).

  • Next.js
  • TypeScript
  • Solidity
  • Foundry
  • OpenZeppelin
  • viem
  • +10

  View Case studyView Live demo
• 

  GavL – Next Auctions

  Auctions with Supabase and Stripe

  Full-stack auction case study: Postgres triggers that track the highest bid and send per-user Realtime notifications, RLS, a scheduled Edge Function that closes auctions, and Stripe in test mode (Next.js, TypeScript, Supabase). Known bid-integrity gaps, listed under Known limitations.

  • Next.js
  • TypeScript
  • Supabase
  • Stripe
  • React
  • TanStack Table
  • +8

  View Case studyView Live demo