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Gil LBGL
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Gil LB

@gillb

Senior Backend & AI Engineer, 19+ years building software, now focused on AI (agents, MCP, automation). Also 8 years in Web3.

Brazil
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What I'm looking for

I’m looking to build AI-driven backends where reliability in production matters—strong solution architecture, distributed systems, and security as first-class priorities.


I'm a Senior Software Engineer with 19+ years of experience and over 50 delivered projects. Most of my career has gone into backend and fullstack systems that hold up under real scale, and lately I've focused on building software that puts AI to work inside real products.

Practical AI engineering is where I spend my time now. I build software that automates real processes and develop agents backed by MCP and Skills. I lean on Harness Engineering and Spec-Driven Development to keep the output reliable in production, not just impressive in a demo.

I've also spent 7 years in Web3, a niche few backend engineers can genuinely cross into. And 12 of my years have been as a Tech Lead, leading teams of up to 30, which taught me to value clear architecture and honest communication with the people who depend on what I ship.

What I work with:
- AI Engineering: AI Process Automation, Agent Development, MCP, Skills, Harness Engineering, Spec-Driven Development, Claude & OpenAI APIs
- Backend (since 2008): Node.js, GraphQL / REST / WebSockets, PostgreSQL / MySQL / MongoDB / Prisma, Java / Kotlin
- Blockchain (since 2020): Ethereum / Solidity / Foundry (Architecture, Fuzzing, Gas Optimization), Wagmi / Viem / The Graph
- Web Frontend (since 2008): TypeScript / ReactJS / NextJS / Tailwind

Notable Achievements:
Neon Wallet – Over US$1 Billion in traded volume
Runin Multilaser – Embedded in over 20 Million devices
iTrack – 50 Million invoices; 60k couriers; 2k companies
Apptite – US$1.6 Million in GMV; 100k deliveries; 50k users
Sharity – R$ 2 Million in donations; 100k users
Desabafa – 700k posts

Experience

Work history, roles, and key accomplishments

33Labs logoLA

Main Smart Contract Developer

33Labs

Sep 2025 - May 2026 (8 months)

Designed and developed advanced DeFi protocols with a focus on composability, capital efficiency, and developer experience. Integrated tooling and AI agents into the development and auditing workflow to prioritize security and gas optimization from the architecture stage.

Mosaic logoMO

Main Smart Contract Developer

Mosaic

Sep 2025 - Feb 2026 (5 months)

Contributed to the core architecture of a protocol focused on accessible, cost-efficient, and secure smart contract development. Built AI-assisted tooling for natural-language to contract compositions and implemented multiple DeFi components including launch workflows and Uniswap hook logic with bonding-curve behavior.

Blockchain Services Library logoBL

Tech Lead

Aug 2023 - Jul 2024 (11 months)

Led development of a multi-chain library that normalizes common wallet operations across different blockchains. Created reusable abstractions for multi-chain integrations used by Neon Wallet desktop and mobile applications, including NeoN3, NeoLegacy, and EVM networks.

Neon Wallet logoNW

Tech Lead

Neon Wallet

Jul 2021 - Jul 2024 (3 years)

Architected Neon Wallet’s mobile version and later contributed to the desktop application. Addressed multi-network support, multi-account handling, WalletConnect integration, and protocol-level network interaction for the wallet.

LE

Tech Lead

Letter

Feb 2022 - Apr 2023 (1 year 2 months)

Architected a multi-chain (Neo and Flow) platform for NFT-based decentralized authentication and access validation. Developed smart contracts on both networks, an SDK integrating both chains simultaneously, and related integrations.

LD

Tech Lead

LDC's She Digital

Oct 2019 - Nov 2020 (1 year 1 month)

Architected and developed a Safety, Health, and Environment management platform for use across global units. Implemented Azure Active Directory integration for authentication and user management and designed the application to scale without requiring code changes.

iTrack logoIT

Tech Lead

iTrack

Nov 2016 - Jun 2018 (1 year 7 months)

Led development of a B2B delivery services platform integrating multiple systems for nearly 60,000 couriers. Worked on integration and optimization of large data volumes, including handling tens of millions of invoices and multiple registered companies.

AP

Tech Lead

Apptite

Sep 2015 - Jul 2017 (1 year 10 months)

Owned initial planning, structuring, and development of a food delivery platform across iOS, Android, and the web. Led the early product build focused on delivering an artisanal food marketplace.

MR

Software Engineer

Multilaser Runin

Aug 2014 - Oct 2014 (2 months)

Developed an Android application to automate quality control testing that was previously performed manually. Implemented automated checks for device metrics such as CPU, RAM, GPS, screen brightness, and touch functionality.

SIMET - NIC.br logoSN

Software Engineer

SIMET - NIC.br

Jan 2010 - Jan 2013 (3 years)

Worked on applications for SIMET, an internet quality measurement tool, including proposing and designing a new version of the main application. Migrated from a Java Applet to JavaScript and delivered visualization and testing components such as heat maps, dashboards, and related tooling.

Education

Degrees, certifications, and relevant coursework

Pontifícia Universidade Católica de São Paulo logoPP

Pontifícia Universidade Católica de São Paulo

Bachelor of Science, Computer Science

2008 - 2011

Earned a Bachelor's degree in Computer Science from Pontifícia Universidade Católica de São Paulo (PUC-SP).

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