Fullstack Developer

Chainlabs is a cutting-edge Web3 data analytics and software start-up specializing in uncovering illicit activities on the blockchain. As the largest broker of labeled wallet datasets to leading Web3 AML and KYT companies, our clients include **Chainalysis, TRM Labs, Coinbase Research, Elliptic**, and **Crystal Blockchain**. Our mission is to create actionable intelligence and safeguard the cryptocurrency ecosystem.

**Role Overview**:
We are seeking a versatile and self-driven **Fullstack Backend Engineer who thrives in a rapid-prototyping environment** to join our fully remote team. You’ll play a key role in building two forward-looking products:

- A **crypto asset recovery platform** to simplify blockchain forensics for everyday users.
- A suite of **AI-integrated communication tools**, including:
- An **AI-powered Slack Company Coach** combining Slack API, Zapier automations, and custom dashboards.
- A **WhatsApp-based messaging assistant** for landlords and tenants, powered by large language models and local service data.

**This role will initially be part-time, with the potential to transition into a full-time position after a few months based on performance and project needs. We offer competitive compensation, paid in fiat or cryptocurrency.**

**Requirements**:

- Proficiency in **JavaScript/TypeScript**, with hands-on experience in **React.js** or **Vue.js**.
- Backend experience with **Node.js + Express**, **Firebase**, or **Supabase**.
- Experience integrating **Slack API** and **Twilio/WhatsApp Business API**.
- Proven ability to work with **LLMs** (OpenAI, Claude, Mistral, etc.) in production environments.
- Understanding of **prompt engineering**, context window strategies, and vector memory (e.g., Pinecone, ChromaDB).
- Experience with **AI pair programming tools** such as **Cursor AI**, **GitHub Copilot**, or **Cody** (non-negotiable).
- Comfortable embedding dashboards using tools like **Streamlit**, **Superset**, or **Metabase**.
- Experience working with **PostgreSQL** or similar relational databases.
- Knowledge of **blockchain data**, wallet structures, and APIs like **Bitquery**, **Etherscan**, or **Covalent**.
- Strong grasp of **Git**, version control, and modern dev workflows.
- Experience with analytics tools such as **Hotjar**, **Google Analytics**, or **Mixpanel**.

**Nice to Haves**:

- Experience building with **chatbot frameworks** like LangChain, Dialogflow, or custom GPT tools.
- Familiarity with **A/B testing platforms** such as Google Optimize or Optimizely.
- Previous work on **fintech** or **crypto products**.
- Exposure to frontend/backend deployment tools such as **Netlify**, **Vercel**, **Heroku**, or **GCP**.
- Comfort working in fast-paced, iterative, early-stage environments with limited structure.

**Key Responsibilities**:

- Rapidly prototype and iterate on user-facing features and backend infrastructure.
- Build custom integrations with Slack and WhatsApp, enabling AI-assisted communication flows.
- Integrate LLMs into user workflows to provide automated responses and dynamic data retrieval.
- Develop dashboards and internal tools to visualize behavior across messaging platforms and blockchain data.
- Create blockchain forensic tools with interactive visualizations (2-3 hop tracking with tooltips).
- Manage authentication, access control, analytics, and testing frameworks across all products.
- Ship clean, maintainable code and help us scale from MVP to production with security and performance in mind.

**Benefits**
- Flexible, remote-first role with full-time or part-time options.
- Competitive compensation, paid in **fiat or cryptocurrency**.
- Work directly with a data scientist founder and a fast-moving product team.
- Opportunity to shape the core of AI + blockchain products with real impact.
- Exposure to leading tools and the latest AI development workflows.
- Fast, transparent, and curiosity-driven company culture.
- Potential for long-term or expanded responsibilities based on performance.