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AINEXIM

Software Solutions

CSIR EOI No. 8121/10/02/2026

Software Development
Portfolio

Expression of Interest submission for the provision of software development services to the CSIR for a period of three years.

Demonstrating proficiency in C/C++, Python, JavaScript, modern web stacks, REST APIs, MQTT IoT, Docker, software design, and testing.

View Projects Docker Images
4
Projects
5
Languages
70+
Test Cases
13
Containers

Demo Projects

Four complete projects demonstrating proficiency across all 7 evaluation criteria — C/C++, Python, JavaScript, web development, IoT, containerization, and testing.

IoT Weather Dashboard

Main Task

Full-Stack Web Application — Main Task Completion

Comprehensive IoT dashboard with real-time weather data, MQTT sensor integration, WebSocket updates, and dual Grid/Tree views. Features JWT authentication, role-based access, and responsive dark mode UI.

Next.js 14React 18TypeScriptExpress.jsMongoDBSocket.IOMQTTTailwind CSSDocker
GitHub Live Demo Docker

Key Features

  • Grid & Tree View displays
  • Real-time WebSocket updates
  • MQTT IoT sensor integration
  • Open-Meteo weather API
  • JWT auth with RBAC
  • 4 simulated IoT sensors

Architecture

frontend: Next.js 14 App Router + Zustand state
backend: Express.js + Mongoose + Socket.IO
database: MongoDB 7.0
messaging: Eclipse Mosquitto MQTT Broker
simulator: Node.js TypeScript IoT publisher

Stats & Criteria

API Endpoints: 22
Test Cases: 8+
Docker Containers: 5

Criteria Addressed:

Task Completion (Main) JavaScript & Node.js REST API & MQTT IoT Modern Web Stack Docker

Docker Images

docker pull aineximeoi/eoi2-frontend:latestdocker pull aineximeoi/eoi2-backend:latestdocker pull aineximeoi/eoi2-iot-simulator:latest

Sequelize ORM Web App

ReactJS + Node.js + PostgreSQL

Full-stack sensor management application demonstrating Sequelize ORM with PostgreSQL. Features JWT authentication, RESTful API with CRUD operations, and comprehensive test coverage.

React 18Express.jsSequelize 6PostgreSQL 15JWTJestDocker
GitHub Live Demo Docker

Python Analytics API

FastAPI + SQLAlchemy 2.0 + PostgreSQL

Production-grade FastAPI microservice with async patterns, SQLAlchemy 2.0 Mapped ORM, Pydantic v2 validation, and real-time analytics with threshold-based alerting on IoT sensor data.

Python 3.12FastAPISQLAlchemy 2.0Pydantic v2PostgreSQL 16RedispytestDocker
GitHub Live Demo Docker

C++ Embedded Firmware

C++17 Sensor Firmware with MQTT 3.1.1

Embedded firmware simulator in modern C++17 with pure C11 data structures, custom MQTT 3.1.1 binary protocol implementation, zero-dependency JSON serialization, and dual-mode publishing (console/TCP).

C++17C11CMakeMQTT 3.1.1Google TestTCP SocketsDocker
GitHub Live Demo Docker

Technology Stack

Full spectrum of technologies demonstrated across all projects

Languages

C11C++17Python 3.12TypeScriptJavaScript

Frontend

Next.js 14React 18Tailwind CSSZustand

Backend

Express.jsFastAPISocket.IOSequelizeSQLAlchemy 2.0

Databases

PostgreSQL 16MongoDB 7.0RedisSQLite

IoT & Messaging

MQTT 3.1.1MosquittoWebSocketTCP Sockets

DevOps

DockerDocker ComposeCMakeGitHubVercel

Testing

JestpytestGoogle TestSupertesthttpx

Software Design & Documentation

23 UML diagrams and comprehensive technical documentation

System Architecture

4

High-level system & deployment diagrams

Class Diagrams

5

OOP class hierarchies & relationships

Sequence Diagrams

4

API request/response flows

ERD / Data Models

4

Database entity relationships

Component Diagrams

3

Frontend & backend component structure

Use Case Diagrams

3

User interaction flows

Submission Documents

Cover Letter

Company introduction and expression of interest

Company Profile

AINEXIM company information and capabilities

Technical Proposal

Detailed technical proposal covering all 7 criteria

Docker & Deployment

All applications containerized with multi-stage builds and orchestrated via Docker Compose

Docker Hub Images

# IoT Weather Dashboard (3 images)
docker pull aineximeoi/eoi2-frontend:latest
docker pull aineximeoi/eoi2-backend:latest
docker pull aineximeoi/eoi2-iot-simulator:latest

# Sequelize ORM Web App (2 images)
docker pull aineximeoi/eoi2-sequelize-frontend:latest
docker pull aineximeoi/eoi2-sequelize-backend:latest

# Python Analytics API
docker pull aineximeoi/eoi2-python-analytics:latest

# C++ Embedded Firmware
docker pull aineximeoi/eoi2-firmware:latest

IoT Weather Dashboard

5 containers
cd EIO2_IOT && docker-compose up --build

# Frontend:  http://localhost:3002
# Backend:   http://localhost:3001/api
# MongoDB:   localhost:27018
# MQTT:      localhost:1883

Sequelize ORM App

3 containers
cd EIO2_sequelize && docker-compose up --build

# Frontend:  http://localhost:3000
# Backend:   http://localhost:4000
# PostgreSQL: localhost:5434

Python Analytics API

3 containers
cd EIO2_python && docker-compose up --build

# API + Docs: http://localhost:8000/docs
# PostgreSQL: localhost:5433
# Redis:      localhost:6380

C++ Embedded Firmware

2 containers
cd EIO2_firmware && docker-compose up --build

# Console output: docker logs firmware
# MQTT Broker: localhost:1885
# Tests: docker exec firmware ctest

Run Tests Across All Projects

# Sequelize App — Jest (8+ tests)
cd EIO2_sequelize && npm test

# Python API — pytest (18 tests)
cd EIO2_python && pytest -v --cov=app

# IoT Dashboard — Jest + RTL (8+ tests)
cd EIO2_IOT && npm test

# C++ Firmware — Google Test (44 tests)
cd EIO2_firmware/build && ctest --output-on-failure

Contact

For enquiries regarding this Expression of Interest submission

AINEXIM

Software Development Services

contact@ainexim.co.za