Mandiseli Mfeya

I am a versatile IT professional with experience spanning software development, IT technical support, and data analysis. As a software developer, I have worked with technologies such as C#, .NET, React, Angular, Node.js,HTML, CSS, TypeScript, Flutter, ASP.Net, MongoDB and SQL, building scalable web applications, APIs, and full-stack solutions. In IT support, I have provided end-user support, troubleshooting hardware and software issues, configuring devices, and maintaining IT infrastructure to ensure smooth business operations.

Additionally, I have experience as a data analyst, where I worked with SQL, Excel, and visualization tools like Power BI and Tableau to clean, analyze, and present data for informed decision-making.

My combined background allows me to bridge the gap between development, support, and data-driven insights, making me adaptable to dynamic environments. I bring strong problem-solving skills, attention to detail, and a customer-focused mindset, with the ability to deliver reliable technical solutions while supporting business growth.

Junior Software Developer

UVU Africa – Capaciti | Jan 2023 – Jan 2025

Responsibilities

Developed full-stack web applications using .NET Core, C#, React, and Angular.

Created and consumed RESTful APIs to facilitate secure data exchange between services.

Optmized backend services integrated with MS SQL Server and MongoDB.

Led performance optimization initiatives improving app speed by 35%

Designed and implemented backend systems for data processing using Node.js and ASP.NET.

Refactored and optimized front-end and back-end systems, improving performance by 30%.

Developed React-based UI components and integrated them with Node.js backend.

Enhanced database performance (MySQL, MongoDB, MS SQL Server) through query optimizations.

Mentored interns developers during sprints and code reviews

Key Achievements

Refactored legacy APIs, increasing backend performance by 40%

Introduced monitoring tools for proactive debugging and reliability

Reason for leaving: I completed my contract successfully.

Freelance Web Developer

Oct 2022 – Aug 2024

Responsibilities

Delivered custom CMS websites and e-commerce platforms using WordPress, HTML, CSS, Flutter, Angular, and React

Developed, updated, maintained, and created company mobile applications using Flutter with MySQL database.

Integrated Firebase and AWS Lambda for backend features

Conducted security reviews and performance enhancements

Delivered client websites, provided technical consultations, and trained end-users.

Supported clients with device setup, remote troubleshooting, and cloud services.

Key Projects

✔ E-commerce Website (WordPress + WooCommerce)

Reason for leaving: I completed my contract successfully.

Software Developer Intern

UVU Africa – Capaciti | Jul 2022 – Jan 2023

Responsibilities

Developed single-page apps with React, Angular, HTML, CSS, C#, Node.js, MongoDB, ASP.NET, and MS SQL Server

Engineered scalable modules using ASP.Net Core and React in a microservices architecture

Worked on web solutions using ASP.Net MVC and React, improving page responsiveness.

Designed and implemented backend APIs and ensured cross-origin communication.

Improved data performance by refining queries in MySQL, MS SQL Server and MongoDB.

Integrated third-party APIs and built internal tools

Maintained 90%+ code coverage through unit/integration testing

Created Python scripts and SQL queries for automated reporting

Delivered interactive dashboards for business analytics

Assisted with code reviews, security checks, and Agile sprint ceremonies.

Reason For Leaving: I was internally promoted to a junior developer role.

IT Technical Support

First Choice Varsity College | April 2014 – March 2022

Responsibilities

Delivered 1st and 2nd line technical support to 100+ users.

Diagnosed and resolved issues related to hardware, software, printers, and networking.

Supported mobile devices (iOS/Android) and performed installations.

Managed user accounts via Active Directory and provided access control.

Installed and configured laptops, mobile phones, switches, and printers.

Educated users on software and service usage to reduce repeat incidents.

Reason for leaving: I left because I had to relocate to cape town.

National Diploma in Information Technology

Walter Sisulu University | 2008 – 2011

Grade 12-Umtata College | 2005 – 2007

Certifications

A+, N+, CCNA | Optimi College (2022–2023)

Full-Stack Development Program | UVU Africa - Capaciti

Introduction to Data Science | Simplilearn (2023)

Data Analytics Essentials (In Progress)