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Gabriel Fernandes
@xhaltam
Blockchain Engineer | Back-end | Payments & Infrastructure
About
I'm a backend and infrastructure engineer with 10+ years in banks, fintechs and payments, and blockchain since 2017. I build the layer under the apps: nodes, RPC services, payment pipelines and the cryptography that holds them together. I work directly against full nodes on Bitcoin, Liquid, Ethereum, Solana and Monero (regtest/testnet/mainnet), preferring raw transactions over hosted abstractions. Most of my code is in Go and Rust, plus Python and TypeScript where they fit, Solidity and Bitcoin Script for chains, Erlang for actor systems, and OCaml for blockchain business logic. On infra I work at the container-runtime layer (containerd, OCI, Podman, Docker, Swarm, microVMs), and reach for RFCs on dates and response semantics when already thought through. I care about cryptographically verifiable evidence, and I'm going deeper into WASM, WASI and WAT.
Skills
BlockchainRustGoBitcoinLiquidEthereumSoliditySolanaMoneroNode ManagementRPC ServicesSmart ContractsDistributed SystemsDockerWebAssembly
Accepted payments
USDC
USDT
ETH
Bank transferTrust and activity
Verified walletOn chainjobs Discord
Payout wallet (Ethereum / EVM)✓ Verified owner
0xdD979f1B2D33f5bf259E3eEee5A91E0663BC8991
Always confirm the address and network directly with the freelancer before paying. Blockchain transfers can't be reversed.
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