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- Tasks: Join our team to build innovative blockchain and AI products that make a real impact.
- Company: Chainlabs is a pioneering Web3 start-up focused on blockchain data analytics and security.
- Benefits: Enjoy flexible remote work, competitive pay in fiat or crypto, and growth opportunities.
- Why this job: Shape cutting-edge products in a fast-paced, curious culture with direct impact on the crypto ecosystem.
- Qualifications: Proficiency in JavaScript/TypeScript, React.js or Vue.js, and experience with LLMs and APIs required.
- Other info: Part-time role with potential for full-time transition based on performance.
The predicted salary is between 30000 - 42000 £ per year.
4 weeks ago Be among the first 25 applicants
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 is a unique opportunity to shape early-stage products that fuse blockchain intelligence, LLMs, and automation into real-world applications.
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
Seniority level
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Seniority level
Associate
Employment type
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Employment type
Part-time
Job function
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Job function
Other
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Industries
IT Services and IT Consulting
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Fullstack Developer (Part-time) employer: Chainlabs
Contact Detail:
Chainlabs Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Fullstack Developer (Part-time)
✨Tip Number 1
Familiarise yourself with the specific technologies mentioned in the job description, such as JavaScript/TypeScript, React.js or Vue.js, and Node.js. Having hands-on experience with these tools will not only boost your confidence but also demonstrate your readiness to hit the ground running.
✨Tip Number 2
Showcase your understanding of blockchain technology and its applications. Since Chainlabs focuses on blockchain forensics, being able to discuss relevant projects or experiences can set you apart from other candidates.
✨Tip Number 3
Prepare to discuss your experience with AI and LLMs in production environments. Given the role's focus on integrating AI into products, having concrete examples of how you've used these technologies will be crucial during interviews.
✨Tip Number 4
Network with professionals in the Web3 and blockchain space. Engaging with communities on platforms like LinkedIn or GitHub can provide insights into the industry and may even lead to referrals, increasing your chances of landing an interview.
We think you need these skills to ace Fullstack Developer (Part-time)
Some tips for your application 🫡
Tailor Your CV: Make sure your CV highlights your proficiency in JavaScript/TypeScript, React.js or Vue.js, and backend experience with Node.js. Include specific projects that demonstrate your skills in integrating APIs like Slack and WhatsApp.
Craft a Compelling Cover Letter: In your cover letter, express your enthusiasm for the role and the company. Mention your experience with AI tools and blockchain data, and how you can contribute to their mission of safeguarding the cryptocurrency ecosystem.
Showcase Relevant Projects: If you've worked on projects involving LLMs, blockchain forensics, or AI-integrated tools, be sure to include these in your application. Provide links to your GitHub or portfolio to showcase your work.
Highlight Soft Skills: Since this role requires working in a fast-paced environment, emphasise your ability to adapt, collaborate, and communicate effectively. Mention any experience you have in remote work settings.
How to prepare for a job interview at Chainlabs
✨Showcase Your Technical Skills
Make sure to highlight your proficiency in JavaScript/TypeScript and your experience with frameworks like React.js or Vue.js. Be prepared to discuss specific projects where you've used these technologies, especially in a backend context with Node.js and Express.
✨Demonstrate Your Understanding of AI and LLMs
Since the role involves integrating AI tools, be ready to talk about your experience with large language models and any relevant tools like GitHub Copilot or Cursor AI. Discuss how you've applied prompt engineering and context strategies in past projects.
✨Prepare for Problem-Solving Scenarios
Expect to face technical challenges during the interview. Practice coding problems that involve building integrations with APIs like Slack or WhatsApp. This will demonstrate your ability to think on your feet and solve real-world issues.
✨Familiarise Yourself with Blockchain Concepts
Given the company's focus on blockchain data analytics, brush up on your knowledge of wallet structures, blockchain forensics, and relevant APIs. Being able to discuss these topics will show your genuine interest in the field and the company's mission.
