Software

• Built the members' mobile app in Expo and React Native: a Rights Hub of plain-language rights articles, a Protection Centre for filing and tracking eviction, employment and police cases, and DocuVault for storing and sharing records.
• Integrated Auth0 Universal Login with deep-link callbacks, and an RTK Query client for the backend covering membership, onboarding, cases and documents.
• Set up native push through Amazon SNS to APNs and FCM, with device-token registration and tap-to-open routing, and shipped builds and over-the-air updates with EAS.

React Native, Expo, TypeScript, Redux Toolkit Query, Auth0, NativeWind, Amazon SNS, EAS

• Built backtesting and signal-generation tools for algorithmic trading strategies using Python and TypeScript.
• Developed market data ingestion pipelines and real-time analytics dashboards for quant research workflows.
• Integrated exchange APIs for automated order execution and portfolio monitoring.

Python, PostgreSQL, WebSockets, Jupyter Notebook, QuantConnect

• Built a React Native (Expo) marketplace connecting hosts posting jobs with service providers who apply using a credit-based lead system.
• Implemented location-based provider discovery with Google Maps/Places, in-app booking, and Stripe payments for credit purchases.
• Developed provider KYC verification, job application, and review flows on top of a Redux Toolkit state layer.

React Native, Expo, TypeScript, Redux Toolkit, Stripe, Google Maps/Places, NativeWind

• Architected a multi-tenant platform combining ManyChat-style DM/comment automation (Facebook, Instagram, TikTok, WhatsApp) with a course marketplace under one shared account system.
• Designed a channel-agnostic adapter pattern and flow engine so a single trigger matcher and node-based flow graph drives automation across all four messaging channels.
• Built a WhatsApp automation module on an unofficial socket transport (Baileys), including session management, credential persistence, and reconnection handling.
• Implemented Paystack payments with creator subaccounts and revenue-split payouts for the multi-tenant course marketplace, plus recurring creator subscriptions.

NestJS, Next.js, TypeScript, PostgreSQL, TypeORM, Redis, BullMQ, Paystack, Socket.IO, Turborepo

• Built the customer-facing web app (Next.js) and marketing site for an AI-powered social media scheduling, content-creation, and analytics platform for small businesses.
• Developed post composition, AI-assisted captioning, multi-platform scheduling/publishing, a Fabric.js template studio, and performance analytics with AI-generated insights.
• Built the NestJS/PostgreSQL API server handling auth (email, Google, Apple), social account OAuth publishing, asset uploads, notifications, and a creator community feed.
• Implemented background job processing with Redis/Bull for publishing, token refresh, reminders, and analytics rollups.

Next.js, React, TypeScript, Redux Toolkit, Tailwind CSS, NestJS, PostgreSQL, TypeORM, Redis, Bull, AWS S3

flyrinzo.com

• Architecting and developing a 'TikTok-style' social platform tailored for Christian content creators and audiences.
• Engineering a high-performance backend using Bun, Hono, Drizzle, and PostgreSQL; leveraging Redis for real-time engagement and AWS for scalable infrastructure.

React Native, Bun, Hono, Drizzle, PostgreSQL, Redis, AWS

• Developed a comprehensive platform for managing professional cleaning services across residential, commercial, and construction sites.
• Engineered a robust backend infrastructure using Node.js, Express, and PostgreSQL to handle complex service scheduling and customer management.
• Optimized database queries and API response times to ensure a seamless experience for service providers and clients.

Node.js, Express, PostgreSQL

mintandmatter.com

• Architected a high-performance mobile-first DEX on the Binance Smart Chain (BSC) using React Native.
• Integrated multi-wallet connectivity and real-time liquidity tracking for thousands of trading pairs.
• Streamlined the token swapping process with optimized gas estimation and sub-second UI responsiveness.

React Native, BSC, Web3, RTK Query, Tailwind CSS

exchange.moonex.io

• Engineered a high-performance platform supporting 8+ tokens with instant settlement to local bank accounts.
• Integrated automated payout APIs and secure monitoring to achieve sub-10 second conversion times.
• Optimized liquidity flows and API latency for high-volume financial transactions.

React,React Native, Nativewind, RTK Query, Tailwind CSS

velox.finance

• Developed a hybrid Airbnb-InDrive platform enabling real-time negotiations between landlords and tenants.
• Built a secure proposal system with dynamic price adjustments and automated contract generation.
• Implemented geolocation-based matching to enhance property discovery efficiency.

React Native, Nativewind, RTK Query, Tailwind CSS

klusta.app

• Developed a feature-rich platform for mining, sending, and receiving tokens directly within Telegram.
• Implemented seamless token swapping functionality on the Binance Smart Chain (BSC).
• Integrated Web3.js and secure wallet interactions to ensure reliable real-time blockchain operations.

React, Telegraf.js, ethers.js, BSC, Node.js

t.me/matara_bot

• Architected and deployed decentralized applications using Internet Computer Protocol (ICP) canisters.
• Ensured 100% censorship resistance and high availability through ICP's native blockchain architecture.
• Optimized resource allocation and canister management for cost-effective decentralized hosting.

Motoko, IC SDK, DFX, Rust, Node, Express, PostgreSQL, Prisma, Docker, Redis, BullMq

solinx.link

• Developed a provably fair decentralized dice game on the Internet Computer Protocol (ICP).
• Integrated ICP's threshold cryptography to ensure secure and transparent random number generation.
• Designed an intuitive UI for real-time betting and instant payout verification on-chain.

Motoko, IC SDK, React, Tailwind CSS

dragondice.icp

• Built a robust VTU platform for instant airtime, data, and utility bill payments.
• Integrated multiple third-party payment gateways and service provider APIs for high reliability.
• Implemented a secure wallet system with automated transaction logging and reconciliation.

React, Nativewind, RTK Query, Tailwind CSS, PostgreSQL, REST APIs

vistapayhq.com

• Developed a secure escrow-based property renting platform to protect both landlords and tenants.
• Implemented a milestone-based payment system to ensure funds are released only upon successful verification.
• Built a real-time notification and document management system for rental agreements.

Express.js, NestJS, MongoDB, Escrow APIs

safebankpro.com

• Delivered 10+ freelance projects, including Telegram Mini Apps, mobile finance tools, and eCommerce dashboards.
• Utilized Telegraf.js, React Native, Firebase, and REST APIs to create robust cross-platform solutions.
• Achieved 95% client satisfaction across all projects (per Upwork/Freelance reviews).

Telegraf.js, React Native, Firebase, REST APIs, Next.js, Tailwind CSS

github.com/aobo443