Browse categories
Explore
Fiverr Pro
English
$
USD
I will review your fintech or crypto backend architecture
Senior Backend and Blockchain Engineer
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...
About this Gig
Building or scaling a fintech or crypto backend and want a second opinion before it costs you? I review architectures and give you a prioritized, written action plan.
What I review
- Service boundaries, data flow and API design
- Consistency, idempotency and ledger or transaction integrity
- Failure modes: retries, queues, Kafka, chain reorgs, downtime
- Compliance-driven design: KYC/AML flows, audit trails, access control
- Scalability, observability and technical debt hotspots
About me
Senior backend and blockchain engineer: about 7 years of Java/Spring, 3 years of EVM work, regulated fintech background.
How it works
1. You share diagrams, docs or a walkthrough call.
2. I analyze and send a written report with risks ranked by severity and concrete fixes.
3. We go through it together on a call.
Not included
Smart contract audits, penetration testing, legal or financial advice, implementation work (available as a separate gig).
Development technology:
Java
My Portfolio
FAQ
What do I need to provide for a review?
Architecture diagrams or a short walkthrough call, main flows (payments, ledger, on-chain events), stack and known pain points. NDA welcome. Please never send secrets or production credentials.
Do you audit smart contracts or give legal advice?
No. I review backend architecture around your contracts and payments (data flow, consistency, failure modes). No smart contract audits, no legal, tax or financial advice. I can flag compliance-related design risks for your own counsel to assess.
