Arslan Shakil

Software Engineer Asp .net core

Vaival Technologies • Full-time

Apr 2023 - Present • 3 yrs 4 mos

I am a professional Full Stack ASP.NET Core Developer with 3+ years of experience at Vaival Technologies, where I have been actively involved in building scalable, secure, and high-performance web applications. During my tenure, I worked extensively on blockchain-based crypto projects, including NFT marketplaces and decentralized applications. My responsibilities included developing end-to-end solutions for NFT buying and selling platforms, integrating smart contracts, and ensuring seamless interaction between frontend applications and blockchain networks. I have hands-on experience with: * ASP.NET Core Web API and MVC architecture * Building secure RESTful APIs * Smart contract integration (Ethereum/BSC) * NFT minting, buying, selling, and wallet integrations (e.g., MetaMask) * Background job processing using tools like Hangfire for tasks such as transaction monitoring, blockchain syncing, and scheduled operations * SQL Server database design and optimization * Frontend development using Angular/React for dynamic user experiences In crypto-based systems, I have handled complex workflows such as: * Real-time transaction verification * Gas fee handling and optimization * Secure wallet authentication * Blockchain event listening and syncing with backend systems I focus on writing clean, maintainable code and delivering production-ready solutions. My goal is to help clients build reliable systems that scale efficiently and provide a smooth user experience. If you’re looking for a developer who understands both traditional web development and modern blockchain integration, I’d be happy to collaborate on your project.

Backend Developer Asp .net core

Xeven Solutions • Full-time

May 2022 - Mar 2023 • 10 mos

I worked as a Backend Developer at Xeven Solutions, where I was responsible for designing and developing robust APIs for a Patient Management System (PMS). My core responsibilities included building secure and scalable RESTful APIs using ASP.NET Core. I implemented JWT-based authentication and authorization to ensure secure access control across the system. I also integrated Swagger for API documentation, making it easier for frontend teams and third-party integrations to understand and test endpoints efficiently. I extensively used Entity Framework Core for database operations, including designing data models, managing migrations, and optimizing queries for better performance. Key contributions: * Developed RESTful APIs for patient records, appointments, and medical data management * Implemented JWT authentication for secure user access * Integrated Swagger for clear and interactive API documentation * Designed and managed database schemas using Entity Framework Core * Ensured code quality, performance optimization, and maintainability This experience strengthened my ability to build secure healthcare-related systems while following best practices in backend development.