Backend Engineer in fintech & digital assets.
I build production-grade custody, wallet infrastructure, and RWA/tokenization rails on EVM/L2 ecosystems.

About
I’m a Backend Engineer specialized in fintech and digital assets. I’ve worked across investments, credit, BNPL, digital banking, commodities, and crypto — with a strong focus on production-grade digital-asset custody, wallet infrastructure, and RWA/tokenization platforms.

I design and build secure, high-throughput, compliance-aware financial systems on EVM chains and L2 ecosystems, integrating KYC/AML, settlement, and orchestration layers end-to-end. I enjoy turning legacy finance workflows into programmable rails that improve capital efficiency and user experience.

• 🧱 Focus: Digital-asset custody, tokenization platforms, settlement & indexing backends
• 🔐 Principles: Security first, compliance-aware design, reliability at scale
• ⚙️ Stack at a glance: Java/Spring Boot • TypeScript/NestJS • Go • Kafka/RabbitMQ • Redis • Postgres/MySQL • MongoDB • Elasticsearch • Docker • AWS • Grafana/Loki

• Custody & Wallet Infrastructure
  • Secure wallet services, policy engines, signing workflows
  • MPC/HSM-aware designs, key lifecycle & access controls
• RWA / Tokenization Rails
  • Tokenized funds, bonds, commodities, real-estate-like RWAs
  • Programmable coupon/interest, settlement & distribution flows
• High-Throughput Fintech Backends
  • Event-driven microservices, idempotent processing, auditability
  • Indexer / intelligence layers for on-chain + off-chain data
• Compliance-Aware Architecture
  • KYC/AML integration patterns, jurisdictional constraints
  • Traceability without sacrificing product UX

Languages

• Java (primary), TypeScript/JavaScript, Go

Backend Frameworks

• Spring Boot (microservices, DDD/hexagonal, event-driven backends)
• NestJS (API gateways, orchestration, blockchain-facing services)

Messaging & Streaming

• Apache Kafka (high-throughput event pipelines, exactly-once-ish patterns)
• RabbitMQ (workflow orchestration, task queues)

Data Stores & Search

• Postgres, MySQL (ledger-friendly relational modeling)
• MongoDB (document/event stores)
• Redis (caching, rate limits, distributed locks)
• Elasticsearch (search + analytics on fintech/on-chain data)

Infrastructure & DevOps

• Docker
• AWS (VPC, ECS/EKS, S3, RDS, SQS/SNS, IAM)
• CI/CD patterns (blue/green, canary, idempotent deploys)

Observability

• Grafana + Loki (logs)
• Metrics/tracing-first debugging mindset

Testing

• JUnit, Mocha, NUnit (unit + integration + contract tests)

Most of my production work is private/internal, but I’m always happy to discuss architecture and patterns.

• Correctness over cleverness
• Deterministic + auditable flows
• Security as a product feature
• Boring reliability

• Rust for low-level blockchain services & smart contracts
• ZK-friendly tokenization / compliance patterns
• Pay-per-request & on-chain billing primitives