Arthur
Abeilice
Software Engineer
Latest Experience
Blockchain Consultant
Smart contract development, fiat-to-crypto payment integrations, and decentralized application architecture. Codebase optimization for performance, security, and maintainability.
Open Source Developer
Led Hardhat Upgrades v2→v3 migration; built MASM + NFT architecture for Miden ZK-rollup (Rust); designed GNO.lang upgradeability patterns. Four projects across smart contracts, dev tooling, and blockchain research.
Golang Software Engineer, R&D (Blockchain)
Core developer on cdk-erigon, the Polygon zkEVM sequencer client (Go). Built internal testing tools, debugged Geth-fork issues, supported external clients, and documented the toolchain.
Golang/Solidity Software Engineer (Backend)
Development with Go for GraphQL APIs and ETL servers to index blockchain data. Also helped on documentation, tech interviews, and project management.
- Optimized GraphQL API, improving query response time by 90% via SQL tuning and caching.
- Built ETL servers to index on-chain data via contract/RPC interactions; worked directly with Geth.
- Developed smart contracts (tokens, NFTs, airdrop deployers, governance extensions) and published an NPM library; reviewed and fixed 3rd-party contracts.
- Improved authentication with Sign-In with Ethereum (SIWE); built internal tools for data backfilling, chain automation, and price analytics.
Software Engineer
Development with Golang at backend, micro-services and cloud. Vue.js on front and Python Django for legacy parts.
Junior Software Engineer
Web Developer and project manager assistant. Built internal GUI/CLI DevOps tools, automations for whitelabel products, and reactive Vue.js components. Worked with PHP, ShellScript, Android, and iOS.
Freelancing
- 1st: Web3 PIX on-ramper for digital assets on XMINE DEX.
- 2nd: NEXT.js web3 admin panel: role-gated with smart-contract auth.
- 3rd: Smart-contract indexing with Ponder, for H3aven.
- 4th: LLM workshop for Cyrela via Distrito IA: custom agents + harness patterns.
- 5th: AI SaaS for construction procurement from blueprints (PDF, DXF, IFC).
• • •
About Me
- Econophysics models study 2017. Undergraduate Research with Leonardo S. Lima.
- 1st Place in StartUp Weekend Youth 2014 - BH
- Helped organize Work From Q ( event by Hetman’s )
- General & Chainlink Prizes at Ethereum São Paulo Hackathon 2022
- Entrepreneurship and Innovation, Summer Program in Boston College 2014
- Participated in Solidity workshop & bootcamp at EthereumRio 2022;
- Colégio Loyola Volunteering, Poverty Ailment 2013-2014
- Volunteer at Quartinho BH, a collective music-listening club (2026–present).
- Proficient with Photoshop, GIMP, Audacity, Inkscape, and Corel Draw, editing and design.
“If you don't know, the thing to do is not to get scared, but to learn.”