Available for freelance

MASHAOLE
LETSOALO_

Backend Developer Co-Founder, Zyma Systems

I build the engine room — RESTful APIs, database architecture and secure backend services with C#, ASP.NET Core and Entity Framework Core. Clean architecture. Production-ready. Zero compromise.

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  • Based in Pretoria, South Africa
  • Focus C# & ASP.NET Core
  • Status Open to opportunities
Portrait of Mashaole Letsoalo
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About Me

I build backends
that hold up in production

I'm Mashaole Letsoalo, a backend developer with a growing foundation across both front-end and back-end development. I co-founded Zyma Systems, where I lead backend development for client projects — designing RESTful Web APIs, database architecture and secure business logic with C#, ASP.NET Core and SQL Server.

I'm currently completing a Diploma in Information Technology (Software Development) at Rosebank College. I'm a strong problem-solver with a collaborative mindset, quick to adapt, and eager to contribute to innovative tech solutions in Agile environments.

Let's work together
  • 4+Projects Shipped
  • 4HackerRank Certifications
  • 5+Languages Used
  • ∞Commitment to Growth

Experience & Education

Dec 2025 — Present Current

Backend Developer

Zyma Systems · Co-Founder

  • Co-founded a software development company building custom web solutions for clients.
  • Lead backend development across client projects using C#, ASP.NET Core, Entity Framework Core and .NET Framework.
  • Designed and implemented RESTful Web APIs, including the Marcus Logistics System — a transportation management platform with ride booking, parcel delivery, real-time tracking and role-based access.
  • Built database architecture, business logic and secure backend services on SQL Server with EF Core.
  • Partnered with frontend developers to ship full-stack solutions from requirements gathering to deployment.
  • C#
  • ASP.NET Core Web API
  • EF Core
  • SQL Server
  • .NET 8
Expected Dec 2026 In progress

Diploma in Information Technology

Rosebank College, South Africa · Software Development

  • Core focus: programming fundamentals, GUI development, systems analysis & design, and the full SDLC.
  • Coursework spanning web & mobile application development, database management, information security and project management.
  • Java
  • C#
  • JavaScript
  • PHP
  • Kotlin
  • SQL
  • WPF / XAML

Certifications

Skills

Programming

Core Languages

Strong foundations in object-oriented and structured programming.

  • C#
  • Kotlin
  • Java
  • JavaScript
  • PHP

Backend

APIs & Architecture

Designing structured, scalable backend services and REST APIs.

  • ASP.NET Core
  • RESTful APIs
  • .NET 8
  • Identity / Auth
  • MVC

Data

Databases

Modelling, querying and persisting structured data.

  • SQL Server
  • Entity Framework Core
  • Room Database
  • Database Design

Mobile & Desktop

Application Development

Native Android apps and structured GUI-based desktop software.

  • Android (Kotlin)
  • MVVM
  • WPF
  • XAML
  • Material Design

Web

Front-End Foundations

Building responsive, user-friendly interfaces.

  • HTML5
  • CSS3
  • JavaScript
  • PHP
  • Responsive Design

Tools

Workflow & Libraries

Day-to-day tooling and reporting/export libraries.

  • Git
  • Visual Studio
  • Android Studio
  • EPPlus
  • iText7

Projects

01 Marcus Logistics System Client work Comprehensive transportation management platform supporting ride booking, parcel delivery, real-time tracking and multi-user role-based access. Led the backend and RESTful Web API design at Zyma Systems. C#ASP.NET CoreEF CoreSQL Server 02 Contract Monthly Claim System Full-featured web app for managing monthly contract claims — ASP.NET Core Identity with Manager/User role-based access, full CRUD on EF Core, plus Excel and PDF export. Built on clean MVC architecture with services and database seeding. ASP.NET Core 8IdentityEPPlusiText7 03 FinTrack Pro Personal finance Android app with secure authentication, multi-user data isolation and Shared Wallets via invite codes. Expense/income tracking, budgets with progress bars, receipt attachments, multi-currency support and pie-chart reporting. KotlinRoomMVVMMPAndroidChart 04 Cybersecurity Awareness Chatbot Desktop WPF app teaching cybersecurity best practices. Intelligent chatbot using Levenshtein distance for fuzzy matching and custom sentiment detection, with a multi-strategy response engine and Chat, Quiz, Task Manager and Activity Logger modules. C#WPF / XAML.NETCustom NLP
See more on GitHub

Contact

Ready to build
something great?

Have a project in mind or just want to say hello? I'm always open to new opportunities. Let's make something worth talking about.

Pretoria, South Africa

Email mashaoleshaolin0@gmail.com Email · Alternate mashaole.letsoalo.0@outlook.com Phone 065 644 9330 LinkedIn in/mashaole-letsoalo GitHub github.com/LMS147 Résumé Download PDF