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Sylvain REY
@aymaraeurl
Senior Backend and Blockchain Engineer
United States
English, Spanish, French
About me
Senior backend engineer for fintech and blockchain teams.
7 years of Java and Spring Boot in regulated environments (payments, ledgers, KYC/AML). 3 years on EVM chains: event indexers, reorg handling, Kafka and PostgreSQL pipelines.
What I deliver: backend features and APIs, EVM indexers, and written architecture reviews of fintech and crypto backends, with risks ranked and fixes you can ship.
Scope and price agreed in writing before I start. Tests and documentation with every delivery. English, French, Spanish.
Skills
Sylvain REY
Offline •
See my services
API & Integrations
I will build and fix your java spring boot rest API
Code Review
I will review your fintech or crypto backend architecture
