Backend / Systems Engineer

BlackStone eIT

Key Responsibilities

• Develop and maintain backend services and APIs to support various applications.
• Design and implement scalable and efficient system architectures.
• Manage server infrastructure and ensure system reliability and performance.
• Collaborate with cross-functional teams to define system requirements and deliver solutions.
• Optimize applications for maximum speed and scalability.
• Monitor system health, troubleshoot issues, and perform root cause analysis.
• Maintain security best practices across backend systems and infrastructure.
• Document system architecture, code, and operational procedures.
• - API contract endpoint naming, schemas, HTTP status codes, error format
• - Authentication flow token lifecycle, MFA enforcement points, role hierarchy
• - Workflow state transitions what is permitted, logged, irreversible
• - Rate limiting, throttling, and idempotency design
• - Technology choices within the approved backend stack

• - FastAPI async handlers, dependency injection, Pydantic models, middleware
• - Python 3.10+ type hints, async/await, robust exception handling
• - PostgreSQL ORM (SQLAlchemy), raw query optimization, transaction management
• - Azure AD OAuth 2.0, JWT validation, MSAL, RBAC
• - Redis session store, distributed lock patterns, caching
• - REST API design versioning, error standardization, OpenAPI spec generation
• - Docker + Azure App Service deployment
• - GitHub Actions CI/CD
• - pytest unit and integration test coverage
• - State machine design for multi-step workflows