Open to work

Ahmed Osama Helmy

Cairo, Egypt

Software Engineer @ Raisa EnergyEx-Dell Technologies

LeetCode ~900Codeforces ~1200

Software Engineer

Backend-focused Software Engineer with production experience in .NET, Node.js, and Azure — delivering backend systems, cloud infrastructure, CI/CD pipelines, and AI/LLM integrations.

Backend

.NET · Node.js · Go

Cloud & DevOps

Azure · Terraform · CI/CD

AI Systems

RAG · LLMs · Graph RAG

Frontend

React · Angular · Next.js

Tech Stack

.NET / C#Node.jsGoAzureDockerTerraform

80%

Cost Reduction

Migrated over-provisioned VM to serverless Azure Container App at Raisa Energy with zero downtime

>50%

API Call Reduction

Replaced N+1 Firestore patterns with batch operations on Dell Summer Academy Portal

3.6M+

Documents Bridged

Accounting Documents Integration bridges a Snowflake data warehouse to a single .NET endpoint at Raisa Energy

13K+

Applicants Served

Dell Summer Academy Portal handled 13K+ applicants through a multi-stage selection pipeline

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Experience

Work History

Additional details

Cut infrastructure costs 80% by migrating an over-provisioned financial service to a serverless Azure Container App (Docker + Nginx) with no downtime; reduced environment drift across 3 environments by replacing manual Azure resource management with Terraform IaC — versioning 10+ Azure resources with Key Vault-backed secrets
Reduced financial-document retrieval to a single endpoint by designing an Accounting Documents Integration in .NET with Azure Blob Storage — bridging a Snowflake data warehouse holding 3.6M+ documents
Revoked all hardcoded SAS-token credentials across 3 Blob Storage pipelines by migrating to Azure AD managed identity; added xUnit + Moq tests after a regression-undetected bug hit production
Zeroed duplicated feature code by shipping a generic comments system reused across 4+ entity types; secured 100% of auth flows by delivering a unified OTP-based authentication mechanism in .NET

Tech Stack

.NETAzureTerraformDockerCI/CDSQL ServerContainer Apps

Additional details

Delivered the Dell Summer Academy Portal — full-stack (React, Node.js, Firebase) serving 13K+ applicants; removed N+1 Firestore patterns with batch operations, cutting API calls by >50%
Built a Graph RAG system over CPU/application telemetry for natural-language infrastructure queries; cut test-case authoring time for 5+ engineers with an AI test-generation tool across JIRA and Confluence
Architected production-grade real-time Notification Service — Go, NATS JetStream, WebSocket, PostgreSQL Outbox pattern with exactly-once delivery
Designed and delivered technical training sessions for Dell Summer Academy 2025 & 2026 covering LangChain, RAG pipelines, AI Agents, design patterns, SOLID principles, and databases

Tech Stack

GoNATS JetStreamWebSocketPostgreSQLNode.jsFirebaseLLMsRAG

Additional details

Unblocked independent deployment and testing of a fintech payment flow by refactoring the Payment Gateway .NET Microservice (33+ config models) to Unit of Work + Repository and decoupling the Configuration Service
Reduced service startup coupling across 2 services, enabling isolated unit testing of the payment flow

Tech Stack

.NETMicroservicesRepository PatternSQL ServerClean Architecture

Additional details

Full-stack tool: React.js frontend, Node.js/MongoDB backend, C++ execution engine
Replaced manual configuration steps across teams — boosted cross-team QA efficiency

Tech Stack

C++React.jsNode.jsMongoDBSQLiteAutomation

Additional details

First production engineering role — built end-to-end features in a live SaaS product
Full-stack development: Django REST backend + React.js frontend

Tech Stack

DjangoReact.jsPythonPostgreSQLFull-Stack

Projects

Selected Work

Projects I've built, shipped, and maintained in production.

PersonAd

personal

Graduation Project · Mentored by Microsoft

Client: Microsoft-mentored Graduation Project

AI-powered ad personalisation tool that scrapes social media profiles, models user personas via LangChain pipelines, and serves personalised ad recommendations through a FastAPI backend backed by Azure Cosmos DB.

Designed and built the FastAPI backend and Azure Cosmos DB data layer
LangChain pipelines for user persona modelling from scraped social media data
Social media scraping modules feeding the personalisation engine
Graduation project mentored by Microsoft

FastAPIPythonAzure Cosmos DBLangChainSocial Media Scraping

Source

Qwitter Backend

personal

Real-time Social Platform

Production-ready backend for a Twitter-like platform with real-time features, comprehensive auth, and media handling.

WebSockets for real-time notifications and messaging
JWT-based authentication with refresh token rotation
96% test coverage with comprehensive integration tests
Media upload and processing pipeline

Node.jsPostgreSQLRedisWebSocketsJest

Source

Men's Shop API

Freelance

Freelance — Live on Google Play

Client: Fashion retailer (Play Store)

Production backend for a fashion e-commerce mobile app. Recursive category hierarchy, JWT auth, cart, orders, and Swagger docs — integrated with a Flutter client published on the Play Store.

Recursive nested category hierarchy for flexible product browsing
JWT auth, cart, inventory, and full order management
Clean Architecture: Repository pattern + service layer with EF Core migrations
Supabase-hosted PostgreSQL with fully documented REST API via Swagger
Flutter mobile client published on Google Play Store

.NETASP.NET CoreEF CorePostgreSQLSupabaseJWT

Live Demo Play Store

Other Projects

Bolt Search Engine

High-performance search engine with custom TF-IDF ranking and a pre-indexing word indexer that dramatically reduces query response time.

JavaSpring BootMySQL

Code Courses Quiz Platform

Led database design and query optimization for a Node.js quiz platform competing against all teams. Ranked #1 overall with complex relational query design across users, courses, quizzes, and attempt records.

Node.jsExpressReactMySQL

Online Booking System

Extended an existing .NET MVC booking platform with Stripe-compatible payment checkout, webhook handling, booking status transitions, and a full owner dashboard built with Razor views.

.NET MVCSQL ServerRazor ViewsStripe

Certifications