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.

• 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