Fullstack Web3 Developer

Hi, I'm Kobs

Fullstack Web3 developer with 5 years of shipping products end to end. Utilizes AI with spec-driven development to deliver day-to-day work more efficiently.

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years building
5+
products shipped
10+
engineers led
13
clients served at Kingdomly
25+
Profile
Tech Stack
TypeScript Solidity Next.js Tailwind NoSQL IPFS Node.js PostgreSQL Web3 AWS

Christian Kobe Sergio

Remote, Philippines•OPEN TO WORK

I started as the sole developer of a no-code NFT launchpad and grew into its CTO, leading the engineering team and the creators who built on it. Now I build Web3 products that use AI to feel faster and simpler on-chain.

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Experience

The Suits logo

Aug 2026 — Present

The Suits

Freelance Fullstack Web3 Developer

Remote · Robinhood Chain

Sole engineer on a 3,000-piece NFT collection, from spec to launch-day ops.

On-chain

The Suits Mint

3,000 minted · sold out ~2 h after opening · 691 holders · $36K+ resale volume

Stack: Next.js · TypeScript · Solidity · ERC-721C · Foundry · wagmi / viem · IPFS (Filebase) · Playwright · Vercel

How I built it
  • The ERC-721C mint contract runs phased allowlist windows with per-wallet caps, keeps a 50-piece airdrop reserve, and enforces creator royalties on every resale.
  • The mint site opens on a closet door, tracks supply and windows live, and ends on a reveal card with each suit's rank, tier and traits.
  • Handled the art and metadata upload to IPFS, all 3,000 images pinned and paired with their metadata.
  • Managed the whole mint: NFT holder snapshots, allowlist upload, mint setup, phase scheduling, and the live changes on launch day.

$SUIT Paycheck

657 holders paid in week one · 40% claimed in the first hour · 300M $SUIT set aside for payouts

Stack: Solidity · OpenZeppelin · Foundry · Node.js · Merkle trees · OpenSea API · Next.js · wagmi · Playwright

How I built it
  • SuitPaycheck is the weekly $SUIT payout for Suits NFT holders, verified on-chain so only real holders can claim. Each week holders get 24 hours to claim their cut; whatever goes unclaimed is burned, so supply only ever goes down.
  • Built the holder snapshot script: it pulls every Suits owner, then uses the OpenSea API to drop any NFT currently listed, so listed suits don't get paid.
  • The Payday page counts down to the drop, shows each suit's cut, and claims every open week in one transaction.
1 more at The Suits

$SUIT Token + Uniswap v4 Launch

3,100 trades from 728 traders in the first 24 h · live on Uniswap 7 Sep 2026 · 1B $SUIT supply

Stack: Solidity · Foundry · Uniswap v4 · Dexscreener · Blockscout / Sourcify · Bash · Node.js

How I built it
  • $SUIT is a plain ERC-20: 1B minted once, 700M to the client's ops wallet, 300M to the paycheck. Burnable, no owner, no tax.
  • Launch scripts for deploy, verify, wire-to-paycheck, fund and sanity checks, each guarded so it won't run twice or against the wrong token.
  • Ran the Uniswap v4 launch live with the client: trading pair against tokenised Palantir stock, starting-price maths, safe custody of the liquidity position, every command on a call sheet.
$SUIT Token + Uniswap v4 Launch
V

Jan 2026 — Jun 2026

VISEO

Blockchain Developer

Remote

Smart contracts for Hong Kong's first licensed stablecoin, at Anchorpoint Financial.

Sanction & Directory Compliance

Sanctioned wallets blocked from issuing or redeeming, enforced on-chain

Stack: Solidity · Hardhat · TypeScript · Chai · Mocha

How I built it
  • Engineered the sanction enforcement contract for Anchorpoint Financial's stablecoin — blocking issuance and redemption for any wallet matching a live on-chain sanctions directory, meeting Hong Kong licensing requirements.
  • Designed and deployed a platform and user directory contract system that serves as the single source of truth for permissioned access across Anchorpoint's stablecoin and tokenised-asset operations.

On-chain Rate Limiting

Abuse capped per wallet, with human review on high-risk transactions · ready for tokenised real-world assets

Stack: Solidity · Hardhat · TypeScript · wagmi · viem · Ethereum

How I built it
  • Implemented a custom on-chain rate-limiting module for Anchorpoint's stablecoin contracts — enforcing per-address call quotas to prevent abuse of minting and redemption flows on a live regulated platform.
  • Designed an elevated policy layer that routes flagged mint and redemption requests through a secondary review — adding a human-in-the-loop gate before high-risk transactions are settled on-chain.
1 more at VISEO

Smart Contract Test Suite

70% unit test coverage across 50+ smart contracts

Stack: Hardhat · Forge · Chai · Mocha · TypeScript

How I built it
  • Authored the unit test suite for Anchorpoint's stablecoin and tokenised-asset platform using Hardhat, Chai, and Mocha — achieving 70% coverage across 50+ smart contracts before client handoff.
  • Integrated automated testing pipelines into the QA workflow — wiring Hardhat test runs into CI so contract regressions were caught automatically on every push.
K

Oct 2023 — Dec 2025

Kingdomly

Chief Technology Officer

Remote

Architected V2 from scratch and led a 13-person engineering team.

Kingdomly Creator + Mint

$8M+ volume traded · 50K+ unique wallets · 144K+ mints · 7K NFT projects launched

Stack: Next.js · TypeScript · Solidity · IPFS · Node.js · PostgreSQL · AWS · Vercel

How I built it
  • Built a full generative art engine — layers, traits, rarity, rules, and 1/1 logic.
  • Shipped customizable mint gates, phases, and forms — allowlists, presales, and KYC.
  • Built the admin dashboard for scheduling, quotas, toggles, and live mint management.
  • Generated auto-provisioned mint pages per project — individually load-tested to handle traffic spikes, peaking at 60K visitors in a single minute.
  • Shipped gas-free mints on Sophon Chain — users mint without holding SOPH to pay network fees.

Kingdomly Bridge

100K+ NFTs moved between chains · $250K+ revenue

Stack: Next.js · TypeScript · Solidity · LayerZero · Viem · PostgreSQL · Docker · AWS

How I built it
  • Shipped cross-chain NFT transfers across Ethereum, Arbitrum, Optimism, Zora, Base, and Bera via LayerZero cross-chain messaging.
  • Built a permissionless bridge setup interface — any project can enable cross-chain bridging without custom contracts.
  • Delivered custom partner integrations including Honey Jar's multi-chain bridge into the Bera ecosystem.
  • Handled LayerZero message verification, refund logic, and gas estimation — ensuring transfers landed reliably with no double-bridge incidents.
3 more at Kingdomly

Kingdomly Marketplace

$50K+ trading revenue from v1

Stack: Next.js · TypeScript · Solidity · Reservoir SDK · Seaport · Subgraph / Indexer · Vercel

How I built it
  • Shipped v1 on Berachain day one using Reservoir SDK — extending mint drops into active secondary trading.
  • Led v2 on Seaport + LimitBreak — custom indexer, orderbooks, and multi-chain transaction handling.
  • Kept listings cheap to post and creators paid on every resale, using the ERC721AC + EIP-2981 royalty standards.
  • Shipped collection pages, rarity rankings, offer/bid flows, and a real-time activity feed on top of the orderbook.
Kingdomly Marketplace

Kingdomly Staking

6 staking pools launched · including 1 protocol-level pool

Stack: Next.js · TypeScript · Solidity · Viem · Firebase · Vercel

How I built it
  • Engineered smart contracts — audited by Hashlock — powering secure, flexible NFT staking pools.
  • Built permissionless pool deployment: any creator can launch staking for any collection without writing code.
  • Delivered a self-serve pool configuration UI — creators set reward tokens, lock durations, multipliers, and capacity caps from a no-code admin panel.

Kingdomly Docs

50% less onboarding & support overhead

Stack: Mintlify · MDX

How I built it
  • Authored end-to-end documentation covering Creator, Mint, Marketplace, Staking, and Bridge.
  • Implemented MDX components and a scalable information architecture to stay consistent across rapid product iterations.
Kingdomly Docs
S

Jul 2023 — Oct 2023

Stratpoint

DevOps Engineer InternFirst DevOps intern to skip the cloud fundamentals track, on live infrastructure within a week.

How I built it

More reliable deploys and faster incident response

  • Containerized and deployed internal services with Docker and Kubernetes.
  • Implemented observability with Grafana and Jenkins to track uptime and logs.
  • Built a Telegram alerting system that posts outage and health updates automatically.

Stack: Docker · Kubernetes · Grafana · Jenkins · Telegram Bot API

GitHub Activity

Projects

PRC Inspection and Monitoring System

Production readyPending Pilot Test

Replaces paper-based inspections of schools and hospitals nationwide

Stack: Next.js · TypeScript · Tailwind · Node.js · Firebase · NextAuth · SMTP · Vercel

  • Built a multi-tenant platform supporting 5 user roles — PRC Board Members, ACD, Regional Offices, Oversight Commissioners, and HEIs/Hospitals — each with separate portals.
  • Developed a compliance monitoring workflow purpose-built for PRC BOND's inspection cycles, replacing the legacy accreditation system.
  • Delivered real-time inspection tracking, document submissions, findings, recommendations, and nationwide compliance coverage.
View build
PRC Inspection and Monitoring System

Tenelos — Tennis ELO Rating System

Production deployedFreelance Project

Player rankings, analytics and match predictions, built from raw match data

Stack: MERN Stack · Tailwind · MongoDB · Python · ETL Pipelines

  • Processed large volumes of inconsistent Excel records using Python ETL scripts — turning raw tennis data into a clean, structured dataset.
  • Built a complete player analytics experience — profiles, head-to-head records, match histories, and ELO-based dynamic rankings.
  • Implemented Chart.js visualizations for performance trends, win/loss charts, H2H stats, and ranking changes.
  • Delivered a fullstack platform with admin interface, auth, automated data ingestion, and SEO optimization.
View build
Tenelos — Tennis ELO Rating System

Ready for your next product or MVP

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Quick stats

Timezone
UTC+8 (PH)
Languages
EN, Tagalog
Availability
Open to collabs
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