Worked as a technical liaison and hands-on engineer delivering scalable mobile fintech solutions for telecom operators and financial institutions. Responsible for the full product integration lifecycle from requirement gathering and specification design to API testing, product launch, and ongoing support – ensuring reliable interoperability between internal services and partner systems. ● Collaborated closely with internal business teams and partner organizations’ technical/business stakeholders to define product specifications, analyze system requirements, and align on integration goals. ● Designed and presented UML diagrams, technical overviews, and documentation to both Simbrella’s development team and external partner teams. Iterated specs based on feedback without compromising business logic or rules. ● Developed mock integration environments using a combination of .NET (C#), Node.js, and JavaScript libraries, simulating API calls and user interactions to verify compatibility between systems before live deployment. ● Utilized n8n, a visual workflow automation tool, to rapidly prototype and test partner APIs, creating automations that simulated end-user behaviors and external system events. This enabled faster feedback cycles and reduced dependency on manual testing setups. ● Managed a variety of technical communication protocols including HTTP, HTTPS, SSH, SFTP, SMS, USSD, SMPP and worked extensively with REST/SOAP APIs, handling data in JSON and XML formats. ● Collaborated with the operations team to identify and resolve integration issues post-launch by analyzing logs, identifying root causes, and applying fixes in both documentation and mock testing tools.

Led the end-to-end architecture and development of a scalable, e-commerce platform, collaborating directly with stakeholders to gather requirements, design system workflows, and built performant backend service along with a featureful admin dashboard. Applied modern architectural patterns and optimization strategies, resulting in a 50% increase in API performance and 50% reduction in backend data transfer. ● Designed and implemented a modular backend architecture using .NET (C#) for core business logic and Node.js with Express.js for supporting services such as authentication and third-party API integration. Ensured seamless service communication via RESTful APIs. ● Utilized Entity Framework for efficient MSSQL data access and object-relational mapping, enhanced with AutoMapper for streamlined DTO conversion and FluentValidation to enforce strict validation rules across endpoints. ● Engineered a location-aware product search system by integrating Google Maps API on the frontend and leveraging .NetTopologySuite in the backend to perform geospatial queries. Optimized logic to eliminate unnecessary iterations, which cut payload sizes and improved search speed. ● Built a dedicated authentication service using Node.js/Express, implementing OAuth2 for third-party login, JWT for token-based session handling, and Twilio API for phone number verification via SMS. Designed this microservice to be stateless, scalable, and reusable across projects. ● Developed an interactive admin control panel with Vite + ReactJS (TypeScript) and Material UI, providing dynamic management of product data, users, and content. Integrated Redux Toolkit for efficient state handling, React Router DOM for modular routing, and React Hook Form + Yup for declarative form handling and validation. ● Applied best practices in backend engineering such as asynchronous programming with async/await, middleware layering in Express, error handling standardization, and separation of concerns across services. Designed services to be container-friendly, preparing for future deployment via Docker or cloud orchestration tools.

Monitored performance and completed maintenance on a network of 120+ devices, including workstations, printers, mobile devices, laptops, routers, switches, security cameras, and the main server, keeping a network uptime of over 96%. Performed on-call emergency repairs on server, ensuring the network stays active 24/7. ● Provided 24/7 on-call repairs for a network of 120+ devices and the main server, and quickly identified and resolved problems and network outages by deducing which router, switch, or line was having the problem. ● Set up new devices and workstations, including a new network of 20+ workstations for an office expansion and connecting them to the main network. ● Provided in-person and online IT support, resolving a large variety of issues including network issues, installation of applications, malware removal, and operating system and driver updates.