Ahmed is available for hire

Ahmed Osman

Verified Expert in Engineering

Software Engineer and Developer

Ad Doqi, Dokki, Giza Governorate, Egypt

Toptal member since November 7, 2022

Expertise

Web Development SaaS Artificial Intelligence Full-stack Back-end Developers LLM RAG Enterprise Architecture POS OpenAI Integration

Bio

A software engineer, Ahmed delivers solutions to fill enterprise needs. He brings technical skills and experience to building cloud-based microservices that can be scaled and maintained easily. Ahmed has a vast knowledge of the Microsoft web stack, including ASP.NET MVC, web APIs, SQL Server, and Azure. Also, he has extensive experience in optimizations, compliers, and building desktop applications using C and C++.

Portfolio

Microsoft

ASP.NET, C#, Azure, SignalR, JavaScript, CSS, HTML, Full-stack, React, .NET...

Robert Vasquez

C#, .NET, APIs, Artificial Intelligence (AI), Back-end, Performance, Gemini...

Siemens

C++, C, ASP.NET, Azure, Bootstrap, Leadership, APIs, REST APIs, Django, Python...

Experience

Linux - 8 years
SQL - 5 years
C - 4 years
C++ - 3 years
C# - 3 years
ASP.NET - 3 years
Azure SQL - 1 year
Azure - 1 year

Preferred Environment

Windows, Visual Studio, ASP.NET, Azure, Microsoft, Microsoft Visual Studio, API Integration, Entity Framework Core, Trading

The most amazing...

...thing I've developed is software for Siemens EDA that helps them to use their GUI on rival databases without having to regenerate them.

Work Experience

Software Engineer 2

2022 - PRESENT

Microsoft

Developed microservices that handle the back-end logic for a Bing shopping team.
Created infrastructure for microservices communications.
Fixed bugs in the shopping experience and worked on creating a data stream needed by a recommendation team.

Technologies: ASP.NET, C#, Azure, SignalR, JavaScript, CSS, HTML, Full-stack, React, .NET, ASP.NET Core, Bootstrap, ASP.NET MVC, Leadership, Microsoft SQL Server, ASP.NET Web Forms, eCommerce, APIs, REST APIs, Back-end, Back-end Development, Back-end Performance, Microsoft Visual Studio, Desktop App Development, MySQL, Visual Basic, .NET Core, IIS SQL Server, Entity Framework, API Integration, ChatGPT, TypeScript, Next.js, C#.NET, Amazon Web Services (AWS), AWS Cloud Architecture, .NET 6, Entity Framework Core, Payment APIs, Credit Card Processing, Retail & Wholesale, Order Management, Full-stack Development, POS, Point of Sale, GitHub, Artificial Intelligence (AI), OpenAI, Blazor, Progressive Web Applications (PWAs), Stripe, Integration, Azure API Management, Azure Queue Storage, Azure Functions, FTP, VPN, Web Scraping, Architecture, OpenAI GPT-4 API, OpenAI GPT-3 API, Database Design, API Development, Webhooks, OpenAI API, Prompt Engineering, Azure DevOps, DevOps, Azure App Service, AI Integration, WebSockets, Real-time Systems, Authentication, Deployment, PostgreSQL, Claude Code, Enterprise Architecture, Cloud Infrastructure, Terraform, Agile Software Development, Agentic AI, Generative Artificial Intelligence (GenAI), Security, Payments, Reliability, Fraud Prevention, Event-driven Programming, Message Queues, Claude, Web Development, Claude API, Dashboards, Multi-tenant SaaS, SaaS, Microservices, Multi-tenant Architecture, Microservices Architecture, Compliance, Regulated Industries, Business Rules Engine, Bots, RAG Systems, Model Context Protocol (MCP)

C# Developer

2025 - 2025

Robert Vasquez

Engineered and deployed the custom AI back end, leveraging the Gemini API to power the core conversational service. Developed a robust intent classifier service to accurately categorize user inputs for complex mental wellness and health inquiries.
Established and maintained the necessary cloud infrastructure (APIs, databases, and authentication systems) to support the high-traffic, high-availability AI service.
Collaborated with the front-end team to define and implement the AI service API specifications (REST/gRPC), enabling the seamless integration of new conversational features.

Technologies: C#, .NET, APIs, Artificial Intelligence (AI), Back-end, Performance, Gemini, OpenAI, Nutrition & Supplements, AI Integration, WebSockets, Real-time Systems, Authentication, Deployment, PostgreSQL, Enterprise Architecture, Cloud Infrastructure, Agile Software Development, Agentic AI, Generative Artificial Intelligence (GenAI), Security, Payments, Reliability, Fraud Prevention, Event-driven Programming, Message Queues, Claude, Web Development, Claude API, Dashboards, Multi-tenant SaaS, SaaS, Microservices, Multi-tenant Architecture, Microservices Architecture, Compliance, Regulated Industries, Business Rules Engine, Enterprise Integration Patterns (EIP), Bots, RAG Systems

Senior Software Engineer

2019 - 2022

Siemens

Developed a back-end microservice that handles the generation and processing of a layout design to be used by a front-end team.
Created a back-end server to track our customers' tool usage and trace bugs directly from the customers' side.
Implemented a new hybrid algorithm based on indexing and processing for a desktop tool at Siemens to decrease memory usage from 150 GB to 8 GB.
Ported a desktop tool from Linux GNU Compiler Collection (GCC) to Visual Studio 2017, which helped to make this tool available to Windows users.
Created new features based on customer requests where I contacted customers directly and fixed hot bugs.

Technologies: C++, C, ASP.NET, Azure, Bootstrap, Leadership, APIs, REST APIs, Django, Python, Back-end, Back-end Development, Back-end Performance, Windows Desktop Software, Microsoft Visual Studio, Desktop App Development, .NET, MySQL, TypeScript, C#.NET, Angular, GitHub, Artificial Intelligence (AI), Google Cloud Platform (GCP), Integration, FTP, VPN, Architecture, Mobile Apps, Database Design, API Development, Large Language Models (LLMs), Technical Leadership, Retrieval-augmented Generation (RAG), Customer Relationship Management (CRM), Azure DevOps, Azure App Service, WebSockets, Real-time Systems, Authentication, Deployment, PostgreSQL, Enterprise Architecture, Cloud Infrastructure, Agile Software Development, Security, Payments, Reliability, Fraud Prevention, Event-driven Programming, Message Queues, Chatbots, Claude, Web Development, Claude API, Dashboards, Multi-tenant SaaS, SaaS, Microservices, Multi-tenant Architecture, Microservices Architecture, Compliance, Regulated Industries, Enterprise Integration Patterns (EIP), Bots, RAG Systems, Model Context Protocol (MCP)

Experience

Bookstore Back-end Service

An ASP.NET application for a back-end server of a bookstore that handles user registration. It also takes inventory of books added to carts and reservations and deals with concurrency issues due to multiple users.

Gymnastics Tracking System

An ASP.NET and React website that handles customers' reservations, payments, and tracking of different classes provided by a fitness center. Also, it tracks trainers and their performance and salaries.

Travelling Agency Website

Developed a complete back end for a traveling agency. It allows users to reserve hotels and transportation. We used an external service for a payment system through a Paymob API. Users get recommendations based on hotels and places that they add as favorites and their budget.

Driving Simulation Game

Developed a complete unity game that is one of the automotive leads in the world. This game was used to activate branding for a 2021 car in the Middle East. I developed the game logic and interaction with a Logitech set.

Market Place

Worked on developing a microservice for handling an inventory service for one of the big tech companies for a marketing place platform. I helped design a database and service-to-service communication between the inventory and other services.

Education

2014 - 2019

Bachelor's Degree in Computer Engineering

Cairo University - Cairo, Egypt

Skills

Libraries/APIs

REST APIs, Azure API Management, API Development, OpenAI API, Claude API, Entity Framework, Stripe, React, SignalR, Node.js

Tools

GitHub, Azure App Service, Claude Code, Claude, Microsoft Visual Studio, ChatGPT, VPN, Terraform, Visual Studio, Microsoft Access

Languages

C#, C++, C, SQL, C#.NET, JavaScript, CSS, HTML, Python, Visual Basic, TypeScript, Active Server Pages (ASP)

Frameworks

ASP.NET, .NET, .NET Core, .NET 6, Blazor, Business Rules Engine, ASP.NET Core, Bootstrap, ASP.NET MVC, ASP.NET Web Forms, Django, Next.js, Entity Framework Core, Unity, Angular

Paradigms

Database Design, Real-time Systems, Event-driven Programming, Microservices, Microservices Architecture, Desktop App Development, Azure DevOps, DevOps, Agile Software Development, Model Context Protocol (MCP)

Platforms

Linux, Azure, Amazon Web Services (AWS), Google Cloud Platform (GCP), Azure Functions, Firebase

Storage

Microsoft SQL Server, MySQL, PostgreSQL, Azure SQL, IIS SQL Server, Azure Queue Storage

Industry Expertise

Retail & Wholesale

Other

Full-stack, APIs, Back-end, Back-end Development, Back-end Performance, API Integration, Payment APIs, Credit Card Processing, Order Management, Full-stack Development, POS, Point of Sale, Artificial Intelligence (AI), OpenAI, Progressive Web Applications (PWAs), Integration, Architecture, Large Language Models (LLMs), Technical Leadership, Retrieval-augmented Generation (RAG), AI Integration, WebSockets, Authentication, Enterprise Architecture, Generative Artificial Intelligence (GenAI), Security, Payments, Reliability, Message Queues, Chatbots, Web Development, Multi-tenant SaaS, SaaS, Multi-tenant Architecture, Compliance, Regulated Industries, Bots, RAG Systems, Leadership, eCommerce, Windows Desktop Software, AWS Cloud Architecture, FTP, Web Scraping, Mobile Apps, OpenAI GPT-4 API, OpenAI GPT-3 API, Prompt Engineering, Deployment, Cloud Infrastructure, Agentic AI, Fraud Prevention, Dashboards, Enterprise Integration Patterns (EIP), SOAP, Trading, Webhooks, Customer Relationship Management (CRM), Performance, Gemini, Nutrition & Supplements

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