IDENTIFICATION
Muzammil Hussain — Backend Engineer
SPRING BOOT / MICROSERVICES / SECURITY
I design and build security-first backend systems engineered for production scale. JWT authentication, RBAC, async processing, and APIs designed to handle growth without breaking.
01
SPECIFICATION
METHODOLOGY
- → Security as requirement — JWT, RBAC, token rotation
- → Clean architecture — domain separation, service boundaries
- → 10x load thinking — async, queue-based decoupling
- → Access control — method-level authorization
QUESTIONS BEFORE CODE
- → How does this system break?
- → Who has access to what?
- → What happens at scale?
- → How does it fail safely?
02
TECHNICAL STACK
[SEC]
BACKEND & SECURITY
| Java | Streams, Concurrency, Memory management |
| Spring Boot 3.x | Production configs, Actuator, Profiles |
| Spring Security | JWT, OAuth2, Method-level RBAC |
| REST API | HTTP semantics, Versioning, RFC 7807 errors |
[DB]
DATA LAYER
| PostgreSQL | Indexing, Query optimization, Transactions |
| MongoDB | Document modeling, Aggregation pipelines |
| Redis | Token storage, Caching, Session management |
| JPA/Hibernate | N+1 prevention, Batch operations |
[OPS]
INFRASTRUCTURE
| Docker | Multi-stage builds, Compose orchestration |
| GitHub Actions | CI/CD, Automated testing, Deployment |
| AWS | EC2, S3, RDS, Load balancing |
[MSG]
MESSAGING
| RabbitMQ | Exchanges, Dead letter queues, Retry policies |
| Async patterns | Producer-consumer, Event-driven |
03
SYSTEMS
04
CONTACT
If you're building or scaling backend systems and care about security, correctness, and long-term maintainability, let's talk.