Node.Js Developer

Developed backend on Node.js and Nest.js for blockchain startup. Made features such as: inner platform token burning, referral program, crypto game api; Programmed smart contracts on solidity on Ethereum, BNB networks; Integrated MetaMask wallet connection to 8.finance platform; Programmed token deposit and token withdrawal mechanisms to platform with (used web3 npm package); Created high-load focused backend for >10000 daily users, optimized API speed by 70 percent by using caching with Redis and other performance optimization techniques such as load balancing and scaling docker containers; Created user-friendly front-end on next.js and typescript; Created inner admin panel for startup team to ease the work with users.

Frontend Development: Developed mobile apps using React Native, implementing design patterns such as MVC and MVVM to ensure clean, maintainable, and scalable code. These apps achieved daily user counts of over 2000 and provided a seamless user experience; API Integration: Integrated Google Maps API into the applications to offer users easy and intuitive navigation, enhancing the overall functionality and user engagement; Backend Development: Designed and implemented backend services using Nest.js, adhering to SOLID principles to ensure robust and scalable architecture. The backend was powered by MongoDB, providing efficient data management and storage solutions.

Developed Full-Stack applications for corporate clients using Java and the Spring framework, ensuring the backend architecture adhered to SOLID design principles for maintainability and scalability; Engineered CRM and ERP systems tailored to the corporate segment, utilizing RESTful APIs for seamless integration and communication between services; Designed and implemented budget planning software for the largest air carrier in Kazakhstan, employing design patterns such as Singleton and Factory to enhance code reusability and flexibility; Created budget planning and LMS software for one of the largest mining companies in Kazakhstan, serving over 1,000 regular users, with a focus on performance optimization and robust data management; Leveraged Java-related technologies including Hibernate for ORM, Maven for build automation, and Spring Boot for rapid application development to deliver high-quality solutions that met client requirements.