Open to opportunities

Katana Sato

@katanasato

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Senior Software Engineer specializing in Ethereum, Solidity, and full-stack web3 systems.

United States

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What I'm looking for

I seek roles building secure, production-grade web3 and data systems where I can lead smart contract engineering, API/platform design, and improve observability and security in collaborative, impact-driven teams.

I am a Senior Software Engineer with 7+ years across consulting and product teams, focused on Ethereum, Solidity smart contracts, and full-stack delivery of web3 and data-intensive systems. I translate ambiguous business goals into secure, production-ready architectures, delivering discovery-to-pilot workstreams, proofs-of-concept, and production integrations across blockchain, APIs, and cloud.

I have led end-to-end Ethereum engagements, built smart contracts and event indexing, and driven security and gas-efficiency reviews while scaling backend services, CI/CD, and observability. My work includes contributions to OpenSC (BCG X + WWF), UP42 geospatial marketplace, and TrustExplorer continuous proof-of-reserves—demonstrating impact on provenance, tokenization, and real-time attestation products.

Experience

Work history, roles, and key accomplishments

Current

Senior Software Engineer

Current

Boston Consulting Group

May 2023 - Present (3 years 1 month)

Delivered discovery-to-pilot blockchain workstreams and built Ethereum smart contracts and integrations, driving security reviews and gas-efficiency improvements for provenance, ESG, and tokenization proofs of value.

Ethereum Solidity Smart Contracts Blockchain Integrations React Security Reviews

Software Engineer

LeewayHertz

May 2019 - Apr 2023 (3 years 11 months)

Led end-to-end Ethereum engagements including token/NFT contracts, on-chain/off-chain bridges, realtime proof dashboards, and scaled API services with improved observability and reliability.

Ethereum Solidity TypeScript API Design CI CD

Junior Software Engineer

CareMax

May 2018 - Apr 2019 (11 months)

Built APIs and data-ingestion services for value-based care workflows, implemented analytics views and clinician-facing UI components to surface risk gaps and quality measures.

APIs Data Ingestion Python fastAPI PostgreSQL Analytics