Senior Backend Engineer · Java · Spring Boot · Kafka · AWS
Fintech & Healthtech · Distributed Systems · Remote
Backend systems that handle real scale — event-driven architectures, HIPAA-compliant data pipelines, microservices, and cloud-native infrastructure on AWS.
7 years shipping production systems across fintech, healthtech, and SaaS platforms. Built distributed systems handling 500K+ regulated cryptographic operations annually, and led backend delivery for customer operations at enterprise scale.
Core stack:
Java Spring Boot Node.js/TypeScript Apache Kafka PostgreSQL Redis AWS (EKS · Lambda · SQS · RDS) Docker Kubernetes Terraform
- Monolith → microservices migrations — decoupling tightly-coupled systems without downtime
- Event-driven architecture — Kafka, AWS SQS/EventBridge, async processing pipelines
- HIPAA-compliant backend systems — secure data pipelines, audit logging, PHI handling
- Distributed observability — Datadog, Grafana, CloudWatch, Sentry, Dynatrace
- Multi-tenant SaaS architecture — schema isolation, RBAC, tenant provisioning
| Project | Stack | Description |
|---|---|---|
| Khatim Timestamp Server | Java · Spring Boot · HSM · PostgreSQL | RFC 3161 compliant TSA processing 500K+ digital signatures/year at 750 TPS |
| Khatim PKI Server | Java · Spring Boot · PKCS#11 · AWS | Enterprise PKI/CA platform supporting Post-Quantum Cryptography |
| KhatimDoc | Java · Kafka · Redis · PostgreSQL | HIPAA & eIDAS compliant digital signature platform for enterprises |