Senior Software Engineer and Architect with 14+ years of experience designing and building distributed, scalable, and mission-critical systems across fintech, SaaS, healthcare, and public safety.
I specialize in backend engineering with deep expertise in Java, Kotlin, and C#, focusing on microservices architecture, event-driven systems, and payment infrastructure at scale.
Currently: Building Idem — an open-source double-entry ledger for stablecoin cross-border payments. Shipped v0.1.0 in August 2026.
The ledger layer stablecoin payment companies are missing.
Idem is an open-source, event-sourced double-entry ledger for fintechs and PSPs settling cross-border payments on stablecoin rails. Built from 12 years of seeing payment teams build the same fragile reconciliation system from scratch.
What it does:
- 🔗 Unified entry model — fiat (ACH/PIX/SWIFT) and on-chain (USDC/USDT/BRZ on EVM/Solana/Tron) in a single
MonetaryEntrysealed class. Debits always equal credits, enforced at domain layer. - ⛓️ Chain readers — watches wallet addresses, auto-posts ledger entries when on-chain transfers confirm.
PENDING → SETTLEDautomatically. - 🤖 Agentic engine —
PolicyGuard,AgentAuditEvent(HMAC-signed, written before execution),WorkflowOrchestrator,RollbackService. AI agents reconcile batches and roll back failures via MCP. - 🛡️ Travel Rule detection — IVMS 101 native. Non-blocking compliance queue for cross-border transfers above threshold.
- 🔓 FSL licensed — free to self-host.
docker-compose upin 5 minutes.
Stack: Kotlin · Spring Boot · Spring Modulith · PostgreSQL · Redis · Maven
# Try it in 5 minutes
git clone https://github.com/idem-finance/idem
cd idem && docker-compose up -d→ idem.finance · GitHub · Kotlin SDK on Maven Central
- Open Source Founder — Built and launched Idem v0.1.0: event-sourced double-entry ledger for stablecoin cross-border payments. Kotlin/Spring Boot, multi-chain (EVM/Solana/Tron), MCP-native agentic engine.
- Compliance & Regulatory Impact — Designed enterprise compliance risk assessment framework integrating Jumio and Comply Advantage APIs at Caliza, unblocking BMA regulatory approval for Bermuda Digital Asset Business license
- Award Winner — Adevinta Ignite Awards 2023 (Innovation Category) for modernizing Daft.ie's "Place Ad" feature: 220% NPS improvement (20% → 64%), 97% fraud reduction, 81% revenue increase
- Massive Scale — Led systems handling 130M+ requests/hour during trading periods and millions of daily transactions in fintech/payment platforms
- Architectural Migrations — Successfully migrated 100+ microservices from monolithic healthcare, finance and marketplace platforms to cloud-native SaaS
- Event-Driven Infrastructure — Designed enterprise-wide event bus system standardizing event propagation across corporate systems
Languages & Frameworks:
- Java, Kotlin, C# .NET, TypeScript, Spring Boot, Spring Cloud, Spring Modulith
Architecture & Design:
- Microservices, Distributed Systems, Domain-Driven Design (DDD), Event-Driven Architecture, Event Sourcing, CQRS, Saga Pattern, SOLID Principles
Web3 & Blockchain:
- EVM (Web3j, Alchemy), Solana (sol4k), Tron (Tronscan), Fireblocks MPC Wallets, USDC/USDT/stablecoin rails, IVMS 101 / Travel Rule, MCP Server development
Cloud & DevOps:
- GCP (GKE, Cloud SQL, Memorystore, Cloud Armor), AWS (EC2, RDS, S3, Lambda, SQS, SNS), Azure, Kubernetes, Helm, Terraform, Docker, GitHub Actions, CI/CD
Data & Messaging:
- PostgreSQL (RLS, event sourcing), MySQL, MongoDB, Oracle, Redis, ElasticSearch, Apache Kafka, RabbitMQ, Amazon SQS/SNS
Observability & Monitoring:
- ELK Stack, Grafana, Prometheus, AppDynamics
- 🏗️ Idem — building the Cloud SaaS tier (GCP São Paulo, multi-tenant, Stripe billing) and growing the open source community post-launch
- 🔭 Pilot customers — onboarding cross-border PSPs and stablecoin fintechs onto the open source ledger
- 🌱 Web3 infrastructure — deep work on multi-chain reconciliation (EVM/Solana/Tron), Travel Rule compliance (IVMS 101), and agentic financial workflows via MCP
- 📚 Graduate Studies in Distributed Software Architecture at PUC-Minas (ongoing)
Building in the cross-border stablecoin payment space? Interested in open source fintech infrastructure? Let's talk.
📧 Email: italo@idem.finance 🌐 Idem: idem.finance 💼 LinkedIn: linkedin.com/in/ifsantana 🐦 X: @idem_finance
"The best systems are built by understanding the problem deeply, designing with simplicity in mind, and obsessing over reliability and observability."