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Alex Metelli

Backend & Platform Engineer
Developer tools · AI-assisted engineering · Blockchain infrastructure

I build practical systems for engineers: CLIs, SDKs, APIs, validation tools, local-first automation, and infrastructure that turns messy workflows into reliable loops.

Website Email npm crates.io


Building blocks I care about

Reliable backend systems      CLIs and SDKs              Local-first automation
Developer infrastructure      AI coding workflows        Blockchain tooling
Verification and validation   Starknet / Cairo           Rust, Go, TypeScript, Python

I tend to work close to the edge where developer experience, system reliability, and automation meet: tools that make complex engineering workflows inspectable, repeatable, and safer to operate.


Featured builds

Local-first Go CLI for observing AI coding sessions and producing signed, hash-chained review evidence.

Go · CLI · Ed25519 · AI observability

TypeScript CLI for auditing Agent Skills quality, references, metadata, scoring, and repair readiness.

TypeScript · CLI · static analysis · agent skills

Turns repeated Claude/Codex prompt history into reusable skills and workflow building blocks.

TypeScript · local-first · prompt mining · automation

Pendle-style yield tokenization protocol on Starknet with PT/YT mechanics, AMM markets, frontend, and indexer work.

Cairo · Starknet · DeFi · TypeScript

Proposal scoping and pricing product with TypeScript/Bun backend, Hono API, PostgreSQL/Drizzle, and deployment automation.

TypeScript · Hono · PostgreSQL · Cloudflare

Rust CLI for local multichain infrastructure, bridge testing, transaction inspection, and cross-chain debugging.

Rust · CLI · multichain · developer infrastructure


Open source footprint

I’ve worked across infrastructure, developer tooling, blockchain, and data systems, including contributions around:

  • Supabase CLI — TypeScript/Go CLI improvements for isolated local state and machine-readable startup output
  • Apache DataFusion — Rust SQL planner diagnostics for suspicious NULL equality predicates
  • Starknet Foundry — Voyager contract-verification support and related developer tooling
  • Voyager Verifier — Rust Starknet verification CLI/library work across API clients, source resolution, config/history/status/batch workflows, Dojo support, docs, and release automation
  • Dojo Engine / Apibara DNA — Cairo/Starknet primitives, Sozo verification tooling, indexing infrastructure, and PostgreSQL sink behavior
  • OpenTelemetry Collector, Coder, OpenCode, Hermes Agent, PostHog, Grafana Mimir, Apache Airflow — observability, developer environments, AI coding tools, data pipelines, and workflow orchestration

Published packages

Area Packages
AI / developer tooling skills-doctor, ritualai, claw-browser-automation, install-aztec-skills
Blockchain / payment SDKs x402-starknet, voyager-x402-sdk, cairo-fp
Aztec Rust SDK ecosystem aztec-rs plus crates for RPC/PXE/node clients, accounts, contracts, crypto, fees, wallet, and Ethereum integration
Verification infrastructure eth-rlp-verify, starknet-contract-verifier

Toolbelt

Backend/API work       TypeScript, Go, Python, PostgreSQL, Hono, Drizzle
Systems/tooling        Rust, CLIs, SDKs, validation/reporting, CI/CD
AI engineering         agent workflows, skill systems, prompt-history mining, receipts
Blockchain             Starknet, Cairo, contract verification, DeFi, x402, Aztec

Practical software, sharp tooling, boring reliability.

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