Cofounder, with Giovanny, of six projects across four chains — backend dev and UX/UI. Five merged PRs in Nirium plus three real fixes shipped directly in Kumply and Vouch402 (detail below), UX/UI work across the whole portfolio.
| Project(s) | Chain | Why there |
|---|---|---|
| Kumply | Avalanche | Compliance for regulated institutions: purpose-built Evergreen Subnets give KYC, permissioned validators, and controlled access |
| Vouch402 | Base | Where the x402 agent-payment volume already is: an independent census puts 98.44% of all published x402 resources on Base |
| Prova | Solana | Sub-second finality, ~$0.0004–0.0005 per transaction — the cost profile a high-frequency agent-receipt layer needs |
| Periplo, Nirium, Contextio | Stellar | Payments: $0.0007667 average transaction cost and 24/7 settlement, cheap enough for agent-scale micropayments, plus the SCF funding program this portfolio started in |
I write this with the same rule Giovanny uses on his own profile: if a claim here can't be clicked and checked, it doesn't belong here. I'm a backend dev and UX/UI by background, not just UX/UI — Nirium has five merged PRs, and Kumply/Vouch402 now each have real fixes I shipped directly (address validation before paid/on-chain calls, detail below). Periplo and Contextio still haven't needed my code, so my visible contribution there is still UX/UI, not commits. Stated as that, not padded to look like something it isn't.
Skip the rest if you only have 90 seconds:
- Five merged PRs in
nirium-protocol/nirium— my own shipped code, not a design contribution described in code terms: a resilient reconnecting WebSocket signals client, CLIpay/servecommands for x402, a one-click "Deploy to Vercel" x402 API template, anirium doctorpreflight diagnostic command, and a standalone offline audit-CID/Ed25519 attestation verifier. Each closes a real GrantFox bounty issue, all merged by @Eras256 — full table below. - Three real fixes shipped directly in Kumply and Vouch402 — the
same address-validation gap (no
isAddress()check before an on-chain read or a paid x402 request), fixed in both repos with my own commits, verified signatures. Full detail below. - Prova (cofounded) took 1st place in Mexico at the Dev3Pack Global Hackathon and graduated WayLearn's Solana Foundation-backed Solana Latam Labs Program — full detail and links in the Prova row below.
- Where I haven't personally shipped code, this profile says so plainly instead of implying otherwise — the honesty standard applies to my own side of the work too, not just Giovanny's.
- Two hackathon wins outside this portfolio too, both with Giovanny, both with a public tweet confirming them — ActivaChain (ETH Uruguay 2025) and BioShield Insurance (FDA Track, DeSci Builders Hackathon 2025). Full detail near the bottom.
Merged PRs — nirium-protocol/nirium
My own shipped code, not a design contribution described in code terms — all five authored by me, merged by @Eras256, each closing a GrantFox OSS bounty issue.
| PR | Closes | Title | Merged |
|---|---|---|---|
| #58 | #50 | "Deploy to Vercel" one-click x402-protected API template | 2026-08-24 |
| #59 | #37 | nirium doctor CLI preflight diagnostic command |
2026-08-25 |
| #61 | #45 | Resilient reconnecting WebSocket signals client | 2026-08-25 |
| #60 | #38 | Standalone offline audit-CID + Ed25519 attestation verifier | 2026-08-26 |
| #62 | #44 | CLI pay and serve commands for x402 |
2026-08-26 |
No PR review flow on these — direct commits to the default branch, each one closing its issue by commit message. Verified signatures on all three.
| Commit | Closes | Title | Date |
|---|---|---|---|
49177e0 |
Kumply#1 | SDK: validate address before readContract |
2026-09-12 |
e08117d |
Vouch402#1, #3 | CLI: validate address before a paid request, fix --help falling through to the paid flow |
2026-09-12 |
1ac4d03 |
Vouch402#2 | MCP server: reject malformed addresses at the tool schema layer | 2026-09-12 |
| Project | My role | Notes |
|---|---|---|
| Kumply · kumply.xyz | UX/UI, backend dev | On-chain KYC/KYB/KYA compliance attestations on Avalanche. Currently under review for Avalanche's Team1 Mini Grants. One real fix shipped directly (detail above). |
| Vouch402 · vouch402.xyz | UX/UI, backend dev | x402-metered on-chain risk intelligence for agents on Base. Currently under review for Base Batches. Source at Vouch402/Vouchx402, now public. Two real fixes shipped directly (detail above). |
| Prova · theprova.xyz | UX/UI | Cryptographic on-chain receipts for AI agent actions on Solana. Solana devnet today, not mainnet. Built through two Colosseum hackathon cycles: Prova, and earlier Oraculo at the Solana Cypherpunk Hackathon (Sep-Oct 2025), plus WayLearn's Solana Foundation-backed Solana Latam Labs Program (Jun-Aug 2026), taking 1st place in Mexico at the Dev3Pack Global Hackathon along the way. Applied for a Superteam/Solana Foundation scholarship to attend Breakpoint 2026 — decision pending. |
| Periplo · periplo.xyz | UX/UI | x402 payment facilitator for Stellar with a "Bazaar" discovery catalog. Cofounded; no PRs/issues under my own handle here yet — my contributions have run through pair sessions committed under Giovanny's account. |
| Nirium / nirium · nirium.xyz | Backend dev, UX/UI | Autonomous treasury and x402/MPP payments on Stellar. Five merged PRs above — my first shipped code on this portfolio. |
| Contextio · contextio.xyz | UX/UI | AI agent moving treasury/payroll funds for LatAm SMEs, bound to a verifiable Legal Context Protocol document. Cofounded; contributions so far are design & strategy pair sessions, not commits under my handle. |
Supply-chain transparency platform on Stellar/Soroban — product tokenization, QR-based verification, and fair-trade escrow payments. Next.js + Freighter wallet + Soroban smart contracts (Rust).
Learning repos from the "Código Futura con Stellar" course — JS scripts for account creation, payments, balance monitoring, and Soroban contract invocation on testnet.
M0nsxx/Nirium (early prototype, inactive)
Created 2026-03-21, last touched the same day. Describes early-vision
features (flash loans, ELO reputation, on-chain marketplace) that are
not the current Nirium product — the active codebase lives at
nirium-protocol/nirium.
- ActivaChain — won ETH Uruguay 2025, cofounded with Giovanny. Confirmed by the event's own tweet: "Felicitaciones @ActivaChain! Nos representarán en Devconnect" — the top prize was a ticket + travel to Devconnect (Nov 2025).
- BioShield Insurance — won the FDA Track at the DeSci Builders Hackathon (Gitcoin × Infinita City × Próspera, Honduras, 2025), built with Giovanny. Deployed across Solana, Base, and Optimism. Self-reported — his own tweet at the time, not an organizer announcement.
- PakalFi — DeFi project, Monad Mobil3 hackathon (CDMX).
- x402-Shield — DDoS/Sybil defense via HTTP 402 micropayments (Solana).
The rest of the technical trail — contribution tables, transaction hashes, contract addresses — lives on Giovanny's profile, since most of it is his commits under his account. This page is my own side of the same six projects.