Fahad U.

Freelance Software Engineer specializing in full-stack and backend development for enterprise applications. During this period, I worked on multiple projects across banking, finance, ERP, and business systems, delivering scalable and maintainable software solutions.

My primary responsibilities included designing and developing backend services using C# and .NET / ASP.NET Core, building and optimizing RESTful APIs, and working with Microsoft SQL Server for database design, query optimization, and data modeling. I also contributed to frontend development using React and JavaScript/TypeScript, focusing on responsive, user-friendly, and component-based UI architectures.

In addition, I worked on integrating external services and third-party APIs, ensuring smooth communication between distributed systems. I implemented secure authentication flows, performance optimizations, and system-level improvements to ensure stability and scalability.

I also gained experience with cloud environments such as Microsoft Azure and AWS, including deployment processes and basic DevOps practices such as CI/CD pipelines and Docker-based containerization.

A key part of my recent freelance work includes AI and automation integration using OpenAI / ChatGPT APIs and Large Language Models (LLMs). I applied prompt engineering techniques to build intelligent features, chat-based systems, and automated workflows. I also implemented real-time messaging integrations such as Discord bots for notification and automation systems.

Throughout my freelance work, I followed Clean Code principles, SOLID architecture, and agile development practices. I worked independently while also collaborating with clients and distributed teams, ensuring clear communication and timely delivery.

My focus has always been on building reliable, scalable, and business-driven software solutions that deliver measurable value.

• • Developed enterprise-grade applications using C#, .NET Core, Node.js, React, and TypeScript with microservices architecture.

• • Built responsive front-end portals and mobile apps with SwiftUI, integrated with secure APIs and cloud services.

• • Designed and implemented CI/CD pipelines and containerized deployments to ensure stable production delivery.

• • Conducted code profiling and performance tuning for CPU, memory, and I/O intensive operations.

• • Mentored junior developers and contributed to architecture design discussions for scalable, resilient systems.

• • Implemented monitoring, logging, and tracing to improve system observability and incident response.

• • Developed ERP, HR, and financial applications with C#, .NET Core, ASP.NET Core, and JavaScript.

• • Built microservices and integrated APIs for real-time, event-driven systems with reliable messaging patterns.

• • Optimized relational and NoSQL databases for high performance, scalability, and reliability.

• • Implemented secure containerized deployments using Docker and automated build and release pipelines.

• • Applied memory management, multithreading, and async programming techniques to enhance application throughput.

• • Supported cloud deployments, load balancing, and disaster recovery strategies for business-critical services.