مهندس برمجيات خلفية أول

5+ years in backend software engineering

Responsible for building and maintaining the high-performance services that power a computationally demanding B2B SaaS platform. This involves routing complex workloads through distributed systems, enforcing strict multi-tenant data boundaries, and ensuring every service endpoint meets demanding latency and reliability requirements.

- API Development: Build high-concurrency async services for computation query routing, data-intensive planning workflows, and reporting — designed for performance and reliability under production load.

- Database Architecture: Design and manage a multi-tenant relational schema with row-level security, tenant isolation, and optimized queries across large record volumes. Maintain type-safe data contracts between API and database layers.

- Computation Integration: Route heavy computation jobs through distributed task queues. Enable efficient data sharing between the computation layer and the API. Cache results to meet strict latency requirements.

- Security Implementation: Implement API rate limiting, connection pooling, role-based access control, and comprehensive input validation before data reaches the database.

- Performance Ownership: Own strict response time requirements on computation endpoints under production load — profiled and monitored on every build.

Essential Skills and Qualifications:

- Experience: 5+ years in SaaS or data-intensive backend engineering with real analytical query complexity — not only basic data retrieval.

- Database Expertise: Relational schema design, row-level security, multi-tenant isolation, and query optimization in production environments.

- Async Systems: Distributed task queues, in-memory caching, and efficient data pipelines built and shipped in production — not only designed on paper.

- Security Mindset: RBAC, tenant isolation, data validation, and audit logging implemented as standard, unprompted practice.

- Stack: FastAPI · PostgreSQL 16 · DuckDB · Apache Arrow · Redis + Celery · SQLModel + Pandera — no perfect match required.

Application Requirement:

As part of your application, please answer the following question in a separate document and attach it along with your CV.

Question: Describe a backend system you built that handled multi-tenant data isolation, background job processing, and a relational database at scale. What was your role, and what were the key technical decisions you made?