Backend / Systems Engineer

BlackStone eIT is seeking a skilled Backend / Systems Engineer to join our technical team. In this role, you will be responsible for designing, developing, and maintaining the backend systems and infrastructure that power our applications and services.

You will collaborate closely with frontend developers, DevOps engineers, and product teams to ensure systems are robust, scalable, and secure. The ideal candidate has strong expertise in backend programming, system design, and server management.

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

• Bachelor's degree in Computer Science, Engineering, or a related field.
• 3+ years of experience in backend development or systems engineering.
• Proficiency in backend programming languages such as Java, Python, Go, or Node.js.
• Experience with relational and NoSQL databases (e.g., PostgreSQL, MongoDB).
• Strong knowledge of system design principles and distributed systems.
• Familiarity with containerization and orchestration tools like Docker and Kubernetes.
• Understanding of networking, server management, and security best practices.
• Experience with version control systems like Git.
• Ability to work collaboratively in an agile development environment.
• Excellent problem-solving skills and attention to detail.
• - 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

• Paid Time Off
• Performance Bonus
• Training & Development