Shipping production backend systems

Muhammad
El Sayed

Muhammad's AI portfolio

Answers limited to verified portfolio facts

Backend Software Engineer

I build production APIs, data-intensive systems, and cloud infrastructure with Python, Node.js, PostgreSQL, and AWS. Most recently, I shipped an Arabic-first multi-tenant publishing SaaS.

17,255: requests/sec
100K+: records processed
65%: faster APIs

View Resume Get in Touch

About Me

I am a backend software engineer focused on production APIs, database performance, and data-intensive systems. I have shipped a live multi-tenant SaaS and optimized systems processing more than 100,000 operational records using Django, PostgreSQL, PL/SQL, and AWS.

My work spans API and query optimization, webhook-driven billing, presigned object-storage uploads, and containerized cloud deployment. I also build high-throughput systems with Node.js, C++, ClickHouse, Redis Streams, gRPC, and OpenTelemetry when the workload calls for lower-level performance engineering.

Education

Bachelor of Science in Computer Engineering

Alexandria University

Alexandria, Egypt • Sep 2018 - Jul 2023

Work Experience

Freelance Backend Software Engineer

Ur-Nammu Publishing Portal, contract via Upwork • Remote

Apr 2026 - Present

Production engineering for an Arabic-first, multi-tenant publishing SaaS.

Led and production-deployed the platform with Django, Django REST Framework, and PostgreSQL, implementing tenant isolation, approval workflows, and administrative operations.
Integrated Stripe Checkout and Billing Portal with webhook-driven subscription synchronization, access-state enforcement, and plan-based title quotas.
Designed direct-to-Cloudflare R2 uploads with presigned URLs and deployed ARM64 containers on AWS ECS/Fargate with RDS, Valkey, ALB, SES, and SSM-managed configuration.

Django / DRFPostgreSQLStripeAWSCloudflare R2

Database Software Engineer

Egyptian Armed Forces • Alexandria, Egypt

May 2024 - Apr 2026

Data-critical records systems on Oracle, built under strict reliability requirements.

Ensured data consistency across high-volume military records by engineering and optimizing complex PL/SQL stored procedures and SQL queries, handling 100K+ records under strict reliability requirements.

PL/SQLSQLOracle Database

Software Engineer

Sindion Technology Ltd • Alexandria, Egypt

Sep 2023 - May 2024

Backend engineering for a production property-management platform.

Cut API response time 65% and eliminated 93% of redundant production queries through Django ORM optimization and PostgreSQL composite indexes.
Enabled real-time interactive property boundary visualization on Google Maps by architecting a geospatial data pipeline using PostGIS (MultiPolygon geometries) and designing RESTful API endpoints that transform spatial data into GeoJSON format for the frontend mapping layer.
Documented 20+ API endpoints with request/response schemas and authentication flows using OpenAPI, Swagger, Sphinx, and Read the Docs.

DjangoPostgreSQLPostGISOpenAPIDocker

Software Engineer Intern

Sindion Technology Ltd • Alexandria, Egypt

Jul 2022 - Oct 2022

Performance and maintainability work on a production Django codebase.

Resolved an N+1 bottleneck in Django REST Framework views, cutting redundant queries by 70%.

DjangoDjango REST FrameworkPython

Featured Projects

High-Throughput Log Ingestion Platform

Oct 2025 - Feb 2026

A high-throughput log ingestion system built with Node.js, Redis Streams, ClickHouse, and C++. The polyglot API layer supports HTTP/1.1, HTTP/2, and gRPC, with end-to-end tracing and S3 archival.

Achieved 2.8x throughput improvement (6,071 → 17,255 req/s)
Reduced network payload size by 54% and increased parsing throughput by 9.4x
Increased ingestion consumer throughput by 2.7x, reduced peak CPU load by 75%, cut memory usage by 80% by rewriting in C++
Instrumented the pipeline end-to-end with OpenTelemetry
Implemented log archival to AWS S3 with lifecycle policies

Node.jsC++ClickHouseRedisDockergRPCOpenTelemetryAWS S3

Code

Social Network API

Built RESTful API for social networking platform with Django REST Framework and PostgreSQL, implementing core features (posts, follows, comments, likes) with JWT-based authentication.

Modular backend: 6 Django apps exposing 20+ REST endpoints for users, content, and the social graph, secured with JWT authentication.
Eliminated N+1 queries with select_related / prefetch_related; JSONB columns keep post metadata flexible without schema migrations.
Dockerized deployment with SSL-terminated HTTPS.

DjangoDjango REST FrameworkPostgreSQLRedisDocker

Code