Lead Backend Engineer · Remote from Portugal

João Domingos

Building APIs, Web3 integrations, and blockchain data systems for production partners.

João Domingos avatar
@jdomingos 10+ years building backend systems remotely, including 5 years in blockchain and protocol integrations across EVM, Substrate, Solana, Cosmos, NEAR, Tron, TON, Hyperliquid, and Cardano ecosystems.
10+ years remote
8+ protocol ecosystems
5 years blockchain roughly 50 in web2 years

Claw marks

Accomplishments

A compact record of remote work, scale, blockchain, and engineering instincts.

Protocol integrations at scale

Led backend integrations for staking, DeFi, LP, and perpetuals protocols across heterogeneous blockchain designs.

Partner-facing systems

Worked directly with wallets, custodians, and fintech engineering teams, turning protocol complexity into reliable APIs and SDK-style abstractions.

Blockchain data systems

Built custom indexers and GraphQL APIs for Substrate and EVM networks, including observability with Prometheus and Grafana.

Tidepool shelf

Experience

LinkedIn and CV-style highlights focused on the work behind the work.

Lead APIs

Backend and API leadership

Designs API-driven backend systems that make protocol behavior usable for partners, products, and internal teams.

Web3 Integrations

Protocol integration work

Comfortable working alongside smart contracts and protocol codebases, translating on-chain behavior into backend services.

Scale Production

Scale and reliability

Builds systems that need to stay consistent under growth: monitoring, testing, correctness, and long-term support included.

Remote Ownership

High-ownership delivery

Owns features end-to-end, from design and implementation through deployment, partner support, and maintenance.

Harbor map

Companies

Places, teams, and products that shaped the work.

Apr 2023 - Present Current

Yield.xyz

Head of Engineering, previously Lead Engineer

Leading backend and protocol integration work for a platform spanning staking, DeFi, LP, and perpetuals protocols.

  • Scaled the platform to support 2000+ yield integrations.
  • Worked directly with wallets, custodians, and fintech engineering teams.
  • Integrated protocol logic from Solidity- and Rust-based systems into partner-facing APIs.
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Nov 2022 - Mar 2023

TDF Labs

Backend Engineer

Built blockchain indexers and developer-facing APIs at the Litentry spinoff company.

  • Built indexers for Substrate and EVM networks.
  • Designed GraphQL APIs exposing protocol data in integration-ready formats.
Feb 2022 - Oct 2022

Litentry

Blockchain Backend Engineer

Built protocol data infrastructure across Substrate and EVM systems.

  • Implemented custom indexers for Substrate chains, indexing pallet state and protocol-level data.
  • Built EVM indexing pipelines consuming Solidity contract events and state changes.
  • Introduced serverless indexing workflows and observability with Prometheus and Grafana.
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Sep 2021 - Jan 2022

Swapcard

Senior Backend Engineer

Built and maintained high-performance APIs and backend workflows.

  • Worked across Golang and Node.js services.
  • Focused on reliable backend workflows for production product teams.
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Jan 2016 - May 2021

Spreaker

Senior Full Stack Developer

Joined an early-stage startup through growth and acquisition, working across backend, product, and team maturity.

  • Built APIs serving millions of users.
  • Migrated background processing to AWS SQS and re-architected async pipelines.
  • Led backend modernizations focused on performance and cost efficiency.
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Tool chest

Skills

Backend, protocol, cloud, and delivery tools used to keep real systems moving.

Languages

  • TypeScript / Node.js
  • Golang
  • Python
  • SQL
  • PHP
  • React

Backend & APIs

  • REST
  • GraphQL
  • Protocol integrations
  • SDK-style APIs

Web3

  • Staking
  • DeFi protocols
  • Blockchain indexing
  • Wallet integrations
  • Custody integrations

Smart Contracts

  • Solidity integrations
  • Rust integrations
  • Contract events
  • On-chain state consumption

Cloud & Tooling

  • AWS S3
  • AWS SQS
  • Lambda
  • Athena
  • Redis
  • Docker
  • Kubernetes

Quality & Delivery

  • Testing
  • Documentation
  • Monitoring
  • CI/CD

Education

MSc in Computer Engineering

Instituto Superior Técnico · Lisbon

Ship log

Timeline

  1. 2023 - Now

    Joined Yield.xyz as Lead Engineer and grew into Head of Engineering, leading protocol integrations and backend systems across 2000+ yields.

  2. 2022 - 2023

    Backend and blockchain data engineering across TDF Labs and Litentry, including Substrate and EVM indexers.

  3. 2021 - 2022

    Senior Backend Engineer at Swapcard, building high-performance APIs and backend workflows.

  4. 2016 - 2021

    Senior Full Stack Developer at Spreaker, scaling APIs, async systems, monitoring, and team practices through growth and acquisition.

Signal flare

Curious about protocol integrations or digital money?