Daniel Garbanzo, bitfalt
Daniel Garbanzo / bitfalt
I build infrastructure in Rust: exchanges, AI platforms, blockchains. Hackathons on the side. Pura vida in between.
- now
- Backend Engineer at Nexus
- study
- M.S. Computer Science, TEC
- based
- Costa Rica
- reach
- GitHub (opens in a new tab) · LinkedIn (opens in a new tab) · X (opens in a new tab) · dagarbanz@proton.me
Hi, I’m Daniel. Type help, or just scroll. Both work.
~/bitfalt $ ls
cd into one, or cat a project.
gh contributions --last-year
Experience
ls ~/work -t
nexus/ dojo-coding/ equifax/ mindvault/ onlydust/
- NexusBackend Engineer · Remote, full time
Backend work on the Nexus exchange and its AI platform.
- Built the exchange’s market maker in Rust, deployed it across 4 Kubernetes environments, and cut quote-update latency by 75%.
- Added open-weight models to Nexus’s AI gateway, routing each call to the cheapest available host with automatic failover.
- Built an automated API test harness that caught 13 defects before release, including a release blocker.
- Dojo CodingSoftware Engineer · Remote, full time
- Built and shipped features across Dojo Coding’s product ecosystem and agentic development initiatives: builder onboarding, technical talent evaluation and developer-facing products.
- Created developer tooling for agent workflows, setup diagnostics and structured project execution.
- Main author (36 commits) of code-sensei, a Claude Code plugin that teaches programming while you vibecode.
- EquifaxRPA Intern · Costa Rica
- Built automation scripts that cut recurring daily processes from 2 to 4 hours down to 5 minutes.
- MindVaultEngineering Co-Founder · Costa Rica
- Co-founded and built MindVault, an assessment app about personality, beliefs and cognition. 2,000+ users in under a week, 500,000+ impressions, 4,000+ concurrent sessions.
- OnlyDustOSS Contributor and Maintainer
- Ranked 61st of 8,000+ contributors on OnlyDust.
Open source
git log --author=bitfalt --oneline
932 kakarot-ssj: add eth_chain_id entrypoint 302 scaffold-stark-2: reconcile hooks example with main … 3 more pull requests and 1 repo of my own
- CofiBlocks
Deployed the contracts to Starknet Sepolia and fixed ERC1155 tests.
- scaffold-stellar-agentic
From idea to dApp with prompts. Scaffold Stellar, Trustless Work escrows, Cavos email login, and skills for any coding agent.
Hackathons
ls ~/hackathons --sort=wins
★ parquiz ★ veilescrow ★ buildmyevent # parquiz: both tracks paralock sigilo # result pending gacha-desk echoes-of-the-void
- ParQuiz[prize winner, both tracks]Dojo Game Jam VIII · Team entry
- A multiplayer Parchís-style trivia game on Starknet with Dojo. Matchmaking, private lobbies, VRF dice and on-chain rules.
- Won prizes in both tracks: the General Track and the Embeddable Game Standard Track.
- Team of two. 69 commits from me, 78 from Ritx10.
- VeilEscrow[winner]ETHPuraVida Hackathon · Team entry
- An anonymous escrow marketplace. Semaphore groups hide wallet addresses. Chainlink VRF picks participants fairly. Wallet or email login through thirdweb.
- Top contributor on the team (38 commits).
- BuildMyEvent[winner]Base LATAM Buildathon · Team entry
- A no-code platform to create event pages and sell tickets on Base.
- Wrote the smart contracts.
- Paralock[result pending_]Colosseum Crypto World’s Fair
- Trustless swaps between shielded ZEC and stablecoins on EVM chains. One lock on each chain, one secret opens both. No bridge, no custodian.
- A full swap on public testnets in 3 min 39 s. Escrow contracts on 6 EVM testnets. TypeScript SDK on npm and Rust SDK on crates.io that trade on the same wire protocol. Private mode with adaptor signatures.
- Sigilo[result pending_]Monad Metropolis · Solo
- Private payroll in stablecoins. Workers prove their income in zero knowledge and take salary advances repaid from payroll. Tagline: “The original proof of work.”
- Noir circuit (about 9,400 gates) proved in the browser in about 6 s. Passkey accounts, no seed phrase. Live on Monad testnet.
- Gacha DeskPayBox Chapter 1 (MoonPay)
- A PayBox agent plugin for Collector Crypt card packs on Base. The agent ranks packs by expected value, odds and buyback, then reserves, pays, opens or sells back. Every step needs your passkey.
- Echoes of the VoidDojo Game Jam VI · Full game track
- A minimalist on-chain exploration game on Starknet with the Dojo Engine. Chambers are dark. You send sound pulses to reveal walls and the exit. Every move is an on-chain transaction.
Archive
- Cerberus
Human-in-the-loop agent governance with World ID, x402 and XMTP.
- Nansen Mini Hackathon
NansenCLI query planner.
Talks
ls ~/talks
stellar-sessions-1/ stellar-sessions-2/ stellar-sessions-3/ # all in Spanish
Writing
ls ~/writing
total 0
- Nothing published yet.
The first post lands here, above everything else. Coffee is brewing.