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mj-963/README.md

Marcus Jacob — Flutter & AI Application Engineer

I build and ship production mobile products and AI-powered applications with Flutter, Dart, Python, and modern LLM systems.

Currently building AI-powered consumer and enterprise products at Cyrex Ltd. My work spans cross-platform mobile development, generative AI, conversational systems, RAG pipelines, and developer tooling.

20K+ combined mobile downloads · 4.5+ average product ratings · Android · iOS · Web

Portfolio · LinkedIn · Email


What I Build

Flutter & Cross-Platform Mobile — Android, iOS, and web applications using Flutter/Dart, clean architecture, MVVM, Riverpod, Firebase, Appwrite and REST APIs.

LLM & Conversational AI — Multi-provider orchestration across OpenAI, Claude, Gemini, and Grok, with prompt pipelines, model routing, agent handoffs, web search, and voice experiences.

RAG & Applied AI — Retrieval-augmented generation systems, hybrid semantic and keyword search, vector databases, citation-enforced responses, and AI research tools.

Generative AI Products — Image, video, music, speech, voice, and multi-modal creative applications.

Developer Tooling — Reusable Flutter packages for state management, scoped rebuilds, persistence, effects, and testable application architecture.


Selected Projects

StateForge — Flutter State Management Toolkit

An open-source, feature-scoped state-management package for Flutter with typed stores, selective rebuilds, one-time effects, persistence, undo/redo, and pure Dart testing utilities.

GitHub repository

Flutter Dart State Management Open Source MIT

MediCortex — AI Research Assistant

A RAG system over 50,000+ PubMed papers with hybrid semantic and keyword retrieval, citation-enforced responses, and sub-second query performance.

Python Qdrant Gemini Vertex AI Flutter

MuseMify — AI Music & Audio Creator

A full-stack AI music platform for song generation, AI covers, cinematic monologues, audio extension, lyrics generation, social discovery, playlists, and offline playback.

Flutter Python Appwrite Generative AI APIs

ChatO1 — Multi-Provider LLM Platform

A unified AI interface for OpenAI, Claude, Gemini, and Grok, built around a standardised provider abstraction and intelligent model routing.

Flutter Appwrite Firebase LLM APIs

ImageFlux — Multi-Modal AI Studio

A mobile creative AI studio for generating images, videos, music, voiceovers, sound design, and lip-synced content across multiple AI models.

Flutter Python Node.js Firebase Appwrite Generative AI APIs

MJ Chatbot — AI Companion App

A GPT-4o-powered chatbot with image generation, web search, voice mode, specialist personas, and multi-language support including Nigerian Pidgin. 10K+ downloads.

Flutter Firebase OpenAI APIs


Professional Work at Cyrex Ltd

I have contributed to client-facing products across education, hospitality, manufacturing, payments, and accommodation:

  • Jetverse — Jet simulation and education platform with missions, quizzes, challenges, leaderboards, account management, and a jet encyclopedia.
  • FMH Hotel — Luxury hotel application for room booking, room service, amenities, guest chat, and AI-powered experiences.
  • AquaBoost — Operations platform for managing fish feed inventory, storage, processing, production, accounting, and sales.
  • Detroit Pay — Cryptocurrency trading and management application with real-time markets, deposits, withdrawals, swaps, gift cards, and electricity bill payments.
  • Hostelly — Accommodation booking platform for students and young professionals with advanced search, real-time chat, and secure payments.

Tech Stack

Flutter Dart Riverpod Firebase Appwrite REST APIs

Python Node.js PostgreSQL MongoDB Qdrant

OpenAI Claude Gemini Grok RAG LLM APIs

Prompt Engineering Generative AI Model Orchestration CI/CD


Connect

Portfolio · GitHub · LinkedIn · Email

Pinned Loading

  1. state_forge state_forge Public

    Structured Flutter state management with typed stores, scoped rebuilds, effects, persistence, and test helpers.

    JavaScript

  2. medicortex medicortex Public

    AI-Powered Medical Research Assistant with Elastic hybrid search and Google Gemini

    JavaScript

  3. fl_nodes fl_nodes Public

    Forked from WilliamKarolDiCioccio/fl_nodes

    A fully customizable, lightweight, and scalable node-based editor for Flutter.

    Dart 1