Independent practice · Brazil / worldwide

I design and build blockchain products, end to end.

I'm Lucas, an independent engineer working across smart contracts, protocol infrastructure, and the interfaces people actually use.

Solidity + TypeScriptProtocol + productArchitecture + delivery
Portrait illustration of Lucas Barcelos

Lucas Barcelos

AI Fullstack Engineer · Blockchain · Multi-Agent Systems

Available
8+ yearsExperience
200+Projects
11+Networks

About me

The person behind the work.

I stay personally involved from the first architecture conversation to the final handoff. There is no sales layer and no quiet transfer to a junior team after kickoff.

View my GitHub
01

Think before building

I map the product, risks, and technical boundaries before committing to an implementation.

02

Work in the open

You review working increments and the decisions behind them — not vague progress updates.

03

Build for ownership

The final code, deployment path, and documentation are made for your team to keep using.

Core stack

SolidityTypeScriptReact/Next.jsRustNode.jsGraphQLHardhatFoundryWeb3.jsEthers.jsWagmi/Viem

Networks

Ethereum · BSC · Polygon · Arbitrum · Optimism · Avalanche · Base · Solana · TON · Fantom · Matchain

Selected work

A closer look at what I build.

Reference scopes across exchanges, lending, markets, token launches, staking, and digital assets. Each can be adapted around a real product — they are not one-click clones.

All categories24 projects
Inca Ultrachain
Selected work
04Chains & Wallets

A Layer 1 EVM blockchain with a native on-chain database, declarative views and agent infrastructure at the protocol level.

SolidityGoTypeScriptNext.js
PricingOn request
Lead time12-16 weeks
View project scopeLive reference available ↗
IncaSwap
05DEX & AMM

A decentralized exchange on Matchain covering swaps, liquidity provision, staking, market data and NFTs in one application.

SolidityTypeScriptReactNext.js
PricingOn request
Lead time6-8 weeks
View project scopeLive reference available ↗
PokeHood
06NFT & Marketplaces

A GameFi token presale on Robinhood Chain where buyers immediately mint creatures and talismans and enter battles.

SolidityTypeScriptReactNext.js
PricingOn request
Lead time8-10 weeks
View project scopeLive reference available ↗
Snappy Smart Farming
07Staking & Yield

A yield farming platform that converts any deposited token into LP positions with impermanent loss protection and fixed APR.

SolidityTypeScriptReactNext.js
PricingOn request
Lead time5-7 weeks
View project scopeLive reference available ↗
Vellora Presale
08Token & Presale

A multi-phase token presale platform with buy, claim and swap flows, affiliate tracking and multichain readiness.

SolidityTypeScriptReactNext.js
PricingOn request
Lead time5-7 weeks
View project scopeLive reference available ↗
Vellora Token Upgrade
09Token & Presale

A token migration portal that upgrades NIX holdings to VELL through a deposit address, with no wallet connection required.

SolidityTypeScriptReactNext.js
PricingOn request
Lead time3-4 weeks
View project scopeLive reference available ↗
Trapix Exchange
Selected work
10Trading Platforms

A centralized cryptocurrency exchange with spot, futures, swap, IEO launchpad and a gamified rewards layer.

TypeScriptReactNext.jsNode.js
PricingOn request
Lead time14-18 weeks
View project scopeLive reference available ↗
Sahara AI
Selected work
11AI & Agents

An agentic AI platform spanning an agent marketplace, data services, a developer platform and an agent-oriented blockchain.

TypeScriptReactNext.jsNode.js
PricingOn request
Lead time16-20 weeks
View project scopeLive reference available ↗
DeXe Protocol
Selected work
12DAO & Governance

Governance infrastructure for creating and steering DAOs, built on composable smart contract factories across multiple chains.

SolidityTypeScriptReactHardhat
PricingOn request
Lead time14-18 weeks
View project scopeLive reference available ↗
Roo Trading Platform
13Trading Platforms

A gamified Solana memecoin trading platform with in-feed trading on X/Twitter and a rewards economy.

TypeScriptReactNext.jsNode.js
PricingOn request
Lead time10-12 weeks
View project scopeLive reference available ↗
Auto Trading Agent
Selected work
14AI & Agents

An AI-powered wallet that turns a plain-language instruction into routed, bridged and settled positions across venues and chains.

TypeScriptReactNext.jsNode.js
PricingOn request
Lead time12-16 weeks
View project scopeLive reference available ↗
RWA-HUB
15RWA & Tokenization

A real world asset tokenization platform for publishing, trading and managing on-chain property and securities.

SolidityTypeScriptReactNode.js
PricingOn request
Lead time10-14 weeks
View project scopeLive reference available ↗
OWallet
16Chains & Wallets

A multi-chain Web3 wallet unifying Bitcoin, EVM, Oraichain and Cosmos-SDK networks behind one interface.

TypeScriptReactNode.jsRust
PricingOn request
Lead time14-18 weeks
View project scopeLive reference available ↗
KalySwap
17DEX & AMM

The primary decentralized exchange on KalyChain, combining swap, pools, farming, bridge, staking and a launchpad.

SolidityTypeScriptReactNext.js
PricingOn request
Lead time8-10 weeks
View project scopeLive reference available ↗
Perp Liquidity Layer
18Trading Platforms

An open source perpetual liquidity layer with an order book terminal, lending and yield products in one interface.

TypeScriptReactNext.jsWagmi/Viem
PricingOn request
Lead time10-12 weeks
View project scopeLive reference available ↗
Perp Broker Terminal
19Trading Platforms

A white-label perpetual futures broker terminal on Orderly Network with TradingView charting and full account tooling.

TypeScriptReactNext.jsWagmi/Viem
PricingOn request
Lead time6-8 weeks
View project scopeLive reference available ↗
Streme
20Token & Presale

A token launchpad on Base where rewards stream continuously to stakers, paired with a live auction flywheel.

SolidityTypeScriptReactNext.js
PricingOn request
Lead time8-10 weeks
View project scopeLive reference available ↗
RWA Marketplace
21RWA & Tokenization

A decentralized marketplace for tokenized real world assets with role-based minting, an integrated DEX, oracle and KYC.

SolidityTypeScriptReactNext.js
PricingOn request
Lead time10-12 weeks
View project scopeLive reference available ↗
Vesta
22RWA & Tokenization

A tokenized real world asset investment platform offering equity NFTs, institutional funds and a company launchpad.

SolidityTypeScriptReactNext.js
PricingOn request
Lead time12-16 weeks
View project scopeLive reference available ↗
Predik
23Prediction Markets

Decentralized prediction markets on Base with gasless trading powered by Yellow Network state channels.

SolidityTypeScriptReactNext.js
PricingOn request
Lead time8-10 weeks
View project scopeLive reference available ↗
NexGen Mining
24DeFi Protocols

A crypto mining investment platform with an automated dividend system and real-time portfolio tracking.

TypeScriptReactNext.jsNode.js
PricingOn request
Lead time8-10 weeks
View project scopeLive reference available ↗

Start a project

Have something difficult to build?

Send me the context you already have: the problem, current stage, target network, and any hard constraints. I'll reply personally with the most useful next step.

Talk directly with me

Telegram is usually fastest. Email works well for a longer brief.

Typical response · within one business day