Web, Mobile & Backend Developer

Building polished products from interface to infrastructure.

I design and ship bold web apps, scalable backend systems, and Kotlin Multiplatform experiences with a strong focus on speed, clarity, and production-ready architecture.

Node.js Rust APIs MongoDB + SQL Kotlin Multiplatform

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3+ Core product areas

Full stack Design, backend, and mobile delivery

Remote-ready Available for freelance and long-term builds

Current Focus

Kotlin Multiplatform Apps

Shared business logic across Android, iOS, and web with native-quality UI and strong backend support.

Backend Strength

Node.js
REST and GraphQL APIs

Rust
High-performance services

MongoDB & SQL
Flexible data layers

Availability

Open for new projects Remote collaboration worldwide

About me

Full-stack and mobile-first design with strong backend engineering.

I'm a developer who crafts end-to-end solutions: responsive websites, mobile apps, Kotlin Multiplatform products, and robust backend systems. My work blends clean UI, reliable architecture, and modern tooling to deliver products that scale.

On the backend, I design APIs and data flows with Node.js and Rust, then connect them to MongoDB and SQL systems. On the frontend, I build polished interfaces that feel fast and intuitive.

App Development

Native-quality Android and iOS experiences with Kotlin Multiplatform and modern mobile UX.

Backend Systems

Service design, API architecture, and data integrity using Node, Rust, MongoDB, and SQL.

Production Delivery

Agile release workflows, automated builds, and quality-focused deployment practices.

Expertise

Technologies I use to ship modern products.

Frontend & Web

HTML, CSS, JavaScript, React, responsive design, SPA performance, and accessible experiences.

Mobile & Multiplatform

Kotlin Multiplatform, Android, iOS, scalable app architecture, and native integration.

Backend Engineering

Node.js, Express, Rust services, REST and GraphQL APIs, authentication, and service orchestration.

Databases

MongoDB, SQL databases, schema design, indexing, migration strategies, and data modeling.

DevOps & Tools

Git, Docker, CI/CD, version control, testing, and deployment automation.

Performance

Optimization, progressive enhancement, caching, and user-centric load speed improvements.

React JavaScript Node.js Rust MongoDB SQL Docker CI/CD

Projects

Selected work showing web, mobile, backend, and multiplatform capability.

Web App

Admin Dashboard Platform

Data-driven dashboard with real-time graphs, role-based access, and modular service integrations.

React frontend with responsive UI
Node.js API and MongoDB data sync
Secure auth and analytics workflows

Mobile App

Native Client Experience

Polished mobile application designed for Android and iOS with smooth animations and offline flow.

Kotlin Multiplatform shared business logic
Adaptive UI for phones and tablets
Push notifications and local data caching

Backend Service

High-performance Rust API

Fast service layer for high-throughput requests with strong type safety and low latency.

Rust-based API with async processing
Database orchestration using MongoDB and SQL
Robust monitoring and error handling

Documentation

Understand the architecture and capabilities of each project.

Admin Dashboard Platform

Web Application

A comprehensive data management interface built for real-time analytics and reporting. This project demonstrates full-stack capability from database to interactive UI.

Architecture

Frontend: React with responsive grid layouts and interactive charts
Backend: Node.js Express server with REST API endpoints
Database: MongoDB for flexible document storage and querying
Authentication: JWT-based secure session management

Key Features

Real-time data synchronization and live updates
Role-based access control with granular permissions
Advanced filtering and export capabilities
Responsive design for desktop, tablet, and mobile

Technologies

React Node.js MongoDB Express JWT

Native Client Experience

Mobile Application

A cross-platform mobile application built with Kotlin Multiplatform, providing native-quality experiences on Android and iOS from a single codebase.

Architecture

Shared Logic: Kotlin Multiplatform business logic for Android, iOS, and web
Platform UIs: Native UI frameworks (Compose for Android, SwiftUI for iOS)
Data Layer: SQLite local database with cloud sync capabilities
Networking: RESTful API communication with OAuth2 auth

Key Features

Offline-first architecture with local data persistence
Push notifications and real-time updates
Adaptive UI layouts for phones and tablets
Smooth animations and native transitions

Technologies

Kotlin Multiplatform Compose SwiftUI SQLite OAuth2

High-performance Rust API

Backend Service

A fast, reliable microservice layer written in Rust, designed to handle high-throughput requests with exceptional performance and memory safety guarantees.

Architecture

Runtime: Async Rust with Tokio for concurrent request handling
API Framework: Axum web framework for type-safe routing
Database: Connection pooling for MongoDB and PostgreSQL
Middleware: Logging, rate limiting, and error handling layers

Key Features

Sub-millisecond response times under load
Automatic memory management with zero-cost abstractions
Comprehensive error handling and recovery
Built-in monitoring and structured logging

Technologies

Rust Axum Tokio MongoDB PostgreSQL

Looking for a versatile developer?

From frontend design to backend architecture and mobile multiplatform delivery, I create full product experiences that work across platforms.

Let's build together

Contact

Ready to jump into your next project.

Get in touch

Send a message about your web, mobile, or backend project. I can help design the right architecture and build it end-to-end.

Email: kamaujoe708@gmail.com

LinkedIn: Joe Kamau

WhatsApp: Joe Kamau

Telegram: Joe Kamau

Location: Anywhere remote

Availability: Open for new projects