Mohammed Faraiz

• Built and maintained Python backend services and REST APIs using FastAPI — handling input validation,
authentication, error responses, and OpenAPI documentation across multiple service endpoints in production.
• Integrated third-party payment gateways and notification APIs — including webhook ingestion with signature
verification, idempotency handling, and retry logic to ensure events were processed reliably without duplication.
• Wrote automated tests alongside feature development — Pytest unit and integration tests covering critical
business logic, API contracts, and failure scenarios, maintaining 95%+ coverage across services.
• Managed the full Git workflow on a collaborative team — feature branches, pull requests with clear descriptions,
code review participation, and GitHub Actions CI pipelines that ran on every push.
• Debugged production issues across the application stack — tracing failures through logs, isolating root causes in
API handlers, database queries, and background workers, and resolving them at the source.
• Designed and optimised PostgreSQL schemas — indexes, connection pooling via PgBouncer, and SQLAlchemy ORM
queries that reduced execution time by 50% on high-traffic endpoints.
• Built asynchronous background processing pipelines using Celery and Redis — handling 10, 000+ daily jobs with
configurable retry policies and failure tracking.
• Containerised all services using Docker and Docker Compose, deployed on AWS EC2 behind Nginx with automated
CI/CD via GitHub Actions — consistent deployments across environments with zero post-release rollbacks.
• Produced API documentation, service READMEs, and deployment runbooks that the broader team could work from
independently — reducing onboarding friction and support overhead.