Full Stack Backend Developer (Part-Time)

(10-15 hours per week)* A **crypto asset recovery platform** that simplifies blockchain forensics for everyday users.* A pair of **AI-integrated communication tools**, including:* An **AI-powered Slack Company Coach**, combining Slack API, Zapier automations, and dashboards.* A **WhatsApp-based messaging app** for landlords and tenants, integrating LLMs and a local service database.This is a rare opportunity to work on cutting-edge blockchain tools **and** build new AI-first applications that bridge real-world communication gaps using Slack, WhatsApp, and large language models.### **Responsibilities*** Develop responsive frontends and scalable backends for all three applications.* Build custom Slack and WhatsApp integrations using Slack API and Twilio/WhatsApp Business APIs.* Rapidly prototype MVPs using backend frameworks like **Firebase** or **Supabase**.* Integrate LLMs (GPT-4, Claude, Gemini, etc.) for chatbot logic and automated assistance.* Use **Cursor AI**, **GitHub Copilot**, or similar tools to accelerate development.* Implement user authentication and role-based access across apps.* Build standalone dashboards (e.g., Streamlit, Metabase) to visualize user behavior and Slack team insights.* Design interactive blockchain forensics visualizations (2–3 hops, with tooltips).* Connect with blockchain data APIs (e.g., Bitquery, Etherscan).* Set up analytics and A/B tests to understand and optimize user experience.* Ensure all apps are secure, maintainable, and production-ready—even if built quickly.### **Required Qualifications*** **JavaScript/TypeScript** expertise, with solid experience in **React.js** or **Vue.js**.* Strong backend skills with **Node.js + Express**, **Firebase**, or **Supabase**.* Proven Slack API or WhatsApp API (Twilio) integration experience.* Experience integrating **LLMs** (OpenAI, Claude, Mistral, etc.) into apps or workflows.* Deep understanding of **LLM prompt engineering**, **context windows**, and vector-based memory (e.g., Pinecone, ChromaDB).* Experience with **AI Vibe coding tools** (Cursor AI, GitHub Copilot, Cody, etc.) — this is **non-negotiable**.* Ability to create or embed dashboards with **Streamlit**, **Superset**, or similar tools.* Proficiency in working with relational databases (eg, PgSQL).* Familiarity with blockchain data (wallets, addresses, tokens) and APIs like **Bitquery** or **Covalent**.* Comfortable working with analytics tools like **Google Analytics**, **Hotjar**, or **Mixpanel**.* Experience with version control using **Git**.### **Preferred Qualifications*** Experience with **chatbot frameworks** (LangChain, Dialogflow, custom GPT setups).* Knowledge of **A/B testing tools** like **Google Optimize** or **Optimizely**.* Prior experience working on crypto or fintech products.* Comfort with fast iteration and “vibe coding” in early-stage environments.* Experience with frontend deployment on **Netlify/Vercel**, backend on **Heroku/AWS/GCP**.Listed in: , , , , , , , , .We are looking for a talented and versatile **Fullstack Backend Engineer** who thrives in a **rapid-prototyping environment**. You will lead the development of two innovative products: #J-18808-Ljbffr