Amir Hossein Shirazi
3 Positions

Experience

Professional history focused on backend systems, APIs, databases, and infrastructure.

Senior Backend Engineer

ScaleOps Inc.

2023 – Present

Lead backend architecture for a cloud infrastructure platform serving 200+ enterprise clients. Responsible for system design, API strategy, and database performance.

1Redesigned the core API layer, reducing p99 latency from 800ms to 120ms
2Migrated from monolithic PostgreSQL to a sharded architecture handling 10x traffic
3Implemented event-driven workflows replacing synchronous inter-service calls
4Established API versioning strategy and backward-compatibility guidelines

Backend Engineer

DataStream Technologies

2021 – 2023

Built and maintained real-time data processing pipelines and internal tooling for a B2B analytics platform.

1Designed a streaming ingestion pipeline processing 500K+ events per minute
2Reduced infrastructure costs by 35% through query optimization and caching
3Introduced structured logging and distributed tracing across all services

Full-Stack Developer

Freelance

2019 – 2021

Delivered end-to-end web applications for startups and small businesses. Focused on robust backend systems with clean, functional frontends.

1Built a multi-tenant SaaS platform with role-based access control
2Designed RESTful APIs consumed by web and mobile clients
3Implemented automated deployment pipelines with zero-downtime releases
4Managed PostgreSQL databases with complex relational schemas