Available for hire · Cairo, Egypt

Hi, I'm Serag Eldien Mahmoud

Backend Software Engineer with 2+ years of experience building scalable, high-performance server-side systems. I specialize in Node.js, NestJS, and TypeScript — architecting REST APIs, microservices, and real-time applications used in production. I'm passionate about clean architecture, cloud infrastructure (AWS), database optimization, and solving complex engineering challenges. Always eager to ship meaningful software that makes an impact.

serag@backend-server:~
System Status
Online
Runtime: Node.js v22
Framework: NestJS
Database: PostgreSQL + Redis
Latency: <10ms
Cloud: AWS (S3, SES, EC2)
Containers: Docker + Nginx
Live Logs
[18:38:12]✓ DB pool initialized (max: 20 connections)
[18:38:13]✓ WebSocket gateway ready on port 8080
[18:38:13]✓ NestJS API listening on :5000
[18:38:14]→ Redis cache connected
$npm run start:prod
Who I am

Crafting Robust Backend Solutions.

Backend Software Engineer with 2+ years of experience building scalable, high-performance server-side systems. I specialize in Node.js, NestJS, and TypeScript — architecting REST APIs, microservices, and real-time applications used in production. I'm passionate about clean architecture, cloud infrastructure (AWS), database optimization, and solving complex engineering challenges. Always eager to ship meaningful software that makes an impact.

4+Projects Shipped
2+Years Experience
250+LeetCode Solved
3Cloud Platforms
Serag Eldien
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Experience
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Jan 2024 – Present

Freelance Backend Software Engineer

Self-Employed (Remote)

Designed and delivered production-ready backend systems for multiple clients. Built scalable REST APIs, integrated third-party services (payment gateways, AI APIs, cloud storage), and deployed microservices on AWS using Docker and Nginx.

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Jan 2023 – Sep 2023

AI & Machine Learning Intern

IMPACT – Zewail City of Science

Worked on applied ML projects under Zewail University's IMPACT program. Implemented data pipelines, trained ML models, and contributed to research on intelligent system design.

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Oct 2021 – Dec 2021

Microsoft Student Partner

MSP — Cairo University Chapter

Represented Microsoft on campus, organized workshops and technical sessions on Azure and cloud computing fundamentals.

My Arsenal
PROJECTS
Backend Developer01 /

DocTalker — AI-Powered Document Chat

Full-stack AI platform where users chat with PDFs, .docx files, YouTube videos, and web pages. Built vector-search pipelines using OpenAI embeddings and MongoDB Atlas, with semantic chunking and similarity search for maximum accuracy. Supports voice-to-text input, real-time streaming responses, and multi-format document ingestion.

ExpressMongoDBOpenAI APIAWS S3NginxJWTGeminiVectorDBSemantic SearchHuggingFaceNode Mailer
DocTalker — AI-Powered Document Chat
Backend Developer02 /

Chatty — Real-Time Chat Application

Scalable real-time messaging platform built with Socket.io and NestJS. Features JWT authentication, private & group chat rooms, online presence tracking, message history pagination via PostgreSQL, and Redis-powered pub/sub for horizontal scalability across multiple server instances.

NestJsSocket.ioPostgreSQLPrismaRedisJWTTypescriptDocker
Chatty — Real-Time Chat Application
Backend Developer03 /

Englishome — Online Courses Academy

Production-ready e-learning backend for an English Academy. Architected with NestJS and PostgreSQL (Prisma ORM), featuring AWS SES for OTP authentication, Google & Facebook OAuth via Passport.js, Paymob payment gateway integration, and AWS S3 + CDN for fast media delivery.

NestJsPostgresPrismaPaymobAWS S3JWTAWS SESPassport.js
Englishome — Online Courses Academy
Backend Developer04 /

Foodish — Food Delivery Backend

Robust food delivery platform managing customers, vendors, and delivery users with real-time geographic tracking and nearest-driver assignment algorithm. Features OTP authentication via SMS, Stripe payment integration, admin RBAC dashboard, and vendor voucher management system.

ExpressMongoDBTypescriptSMS OTPStripeJWT
Foodish — Food Delivery Backend
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Education
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Sep 2020 – Sep 2024

B.Sc. Computer Science

Ain Shams University — Faculty of Science, Computer Science Department | GPA: 3.4 / 4.0

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2023

ECPC Collegiate Programming Contest

Egyptian Collegiate Programming Contest (ECPC) — Competitive Programming Participant

Contact with me

If you have any questions or concerns, please don't hesitate to contact me. I am open to any work opportunities that align with my skills and interests.

serag.eldien.mahmoud@gmail.com

+201112027058

Cairo, Egypt