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Fullstack Developer
Full-time Remote
Posted März 20, 2025
Closing on 2025-05-20

About Chatarmin

Chatarmin started as WhatsApp Marketing Software for E-Commerce, now serving 300+ clients, including Marc O’Polo, Waterdrop, and airdrop. As we evolve into an AI-powered Customer Support Suite, we’re set to disrupt the outdated chatbot space with truly intelligent automation.

We are profitable, bootstrapped, and growing fast. Now, we’re looking for exceptional Fullstack Developers to scale and innovate our AI-driven platform.

The Role: Fullstack Developer (AI & RAG Experience Preferred)

As a Fullstack Developer at Chatarmin, you will play a critical role in building and scaling our AI-powered customer experience suite. This is not just about writing code—it’s about shipping cutting-edge AI features that automate more than just FAQs.

You’ll work across the stack, integrating LLMs, Retrieval-Augmented Generation (RAG), and real-time data processing to create seamless customer interactions.

Your Responsibilities

  • Develop & Scale: Build and optimize features across our AI-powered Customer Support Suite.
  • Integrate AI & RAG: Implement Retrieval-Augmented Generation (RAG) to improve customer interactions with real-time, relevant data.
  • Work with LLMs: Fine-tune and optimize LLM-based workflows for intelligent automation.
  • Enhance API Ecosystem: Design robust RESTful & GraphQL APIs that seamlessly integrate with platforms like Shopify, Klaviyo, Zendesk, and more.
  • Optimize Performance: Ensure low-latency AI-driven responses and a scalable backend architecture.
  • Collaborate & Innovate: Work closely with product, AI, and engineering teams to push the limits of AI-powered customer support.

What Makes You a Great Fit

  • MERN Stack Mastery – Strong experience with MongoDB, Express.js, React, and Node.js.
  • AI & RAG Knowledge – Experience working with OpenAI API, Retrieval-Augmented Generation (RAG), and vector databases.
  • API-First Mindset – Comfortable designing and consuming RESTful & GraphQL APIs.
  • Real-Time Data Processing – Familiarity with WebSockets, event-driven architectures, and async processing.
  • Infrastructure & Scaling – Experience with AWS, Docker, Kubernetes, and microservices.
  • Debugging & Optimization – Strong ability to analyze and optimize backend performance & AI response times.
  • Startup Mentality – Thrives in fast-paced, high-ownership environments and enjoys solving complex problems.

Preferred Qualifications

  • 3+ years of fullstack development experience (MERN or similar).
  • Experience with LLMs, OpenAI API, LangChain, or vector search (Pinecone, Weaviate, FAISS, etc.).
  • Built and scaled production AI-powered applications.
  • Experience with eCommerce, customer support, or chatbot automation is a plus.

Why Join Chatarmin?

  • Shape the Future of AI-Powered CX – Your work will impact thousands of businesses.
  • Remote-First Culture – Work from anywhere with a high-autonomy, async-friendly team.
  • Cutting-Edge AI Work – Build and scale AI-driven customer interactions.
  • Growth & Equity – Competitive salary + meaningful equity in a fast-growing company.
  • Fast-Paced, High-Impact Role – Be a foundational part of a fast-scaling AI startup.

Ready to Disrupt AI Customer Support?

Apply now and let’s build the future of AI-driven customer experiences together!

Apply Now
AI Engineer
Full-time Berlin On-site
Posted Februar 28, 2025

About Knowunity

Forget traditional learning! At Knowunity, Europe’s fastest growing AI learning companion, we’re revolutionizing education for students worldwide. Founded in 2020, we’ve quickly become Europe’s leading AI learning companion with over 17 million students across 17 countries in Europe, North and Latin America.

Our platform creates hyper-personalized learning experiences based on each student’s specific needs. Our AI companion guides students through the app, prepares them for exams, creates personalized flashcards, and truly motivates them to learn. With Knowunity, students don’t feel forced to study—they actually love learning and progressing with their companion.

Backed by over $25 million in funding from leading venture capital firms including Project A, Redalpine, Stride, and Educapital, we’re positioned at the forefront of the educational AI revolution during the most exciting time in education technology.

The Role: AI Engineer

We’re seeking a motivated AI Engineer with strong product interest who is hungry to grow their knowledge and career in our fast-paced environment. As part of our 20-person Engineering Department reporting directly to our CTO Lucas, you’ll be at the heart of our AI development efforts.

Your Mission

  • Build and own AI-powered products used by millions of students worldwide
  • Develop and communicate strong product opinions, turning them into impactful features
  • Explain why features matter to users and how they move key metrics
  • Focus on outcomes and impact rather than specific implementations or tools
  • Become an integral part of Europe’s fastest-growing AI learning startup

Why This Role Is Awesome

  • Growth opportunities within an experienced engineering team
  • Direct influence on product decision-making
  • Immediate impact on millions of students globally
  • Chance to work with state-of-the-art AI tools (e.g., Cursor, o1)
  • Experience in a dynamic, fast-paced startup environment

Your Profile

  • Experience working with Large Language Models (LLMs) and strong prompt engineering skills
  • Experience with at least one backend programming language (Go, TypeScript, Python, etc.)
  • Ability to thrive in a fast-paced startup environment
  • Strong interest in consumer products and user experience
  • Belief in the power of speed and execution with willingness to get hands dirty
  • User-focused mindset that prioritizes delivery over rigid processes

What We Offer

We’ve created a supportive environment with numerous benefits:

Work Environment

  • Hybrid work policy with travel budget and team workations
  • Modern office with breakfast, fruits, snacks, coffee, tea, soft drinks
  • Dog-friendly workspace

Personal Development

  • Personal development budget
  • Hackathons and mentoring opportunities
  • Access to cutting-edge AI technologies

Wellness & Benefits

  • Urban Sports Club membership
  • become.1 and Likeminded memberships
  • Corporate benefits through FutureBens
  • Plantclub discounts

Team Culture

  • Regular team events and company gatherings
  • Sports and wellbeing activities
  • Collaborative and supportive work environment

Join us and be part of our educational AI revolution! Help us create a future where every student on the planet can access, enjoy, and benefit from the highest quality education.

Apply Now

About Chatarmin

Chatarmin started as WhatsApp Marketing Software for E-Commerce, now serving 300+ clients, including Marc O’Polo, Waterdrop, and airdrop. As we evolve into an AI-powered Customer Support Suite, we’re set to disrupt the outdated chatbot space with truly intelligent automation.

We are profitable, bootstrapped, and growing fast. Now, we’re looking for exceptional Fullstack Developers to scale and innovate our AI-driven platform.

The Role: Fullstack Developer (AI & RAG Experience Preferred)

As a Fullstack Developer at Chatarmin, you will play a critical role in building and scaling our AI-powered customer experience suite. This is not just about writing code—it’s about shipping cutting-edge AI features that automate more than just FAQs.

You’ll work across the stack, integrating LLMs, Retrieval-Augmented Generation (RAG), and real-time data processing to create seamless customer interactions.

Your Responsibilities

  • Develop & Scale: Build and optimize features across our AI-powered Customer Support Suite.
  • Integrate AI & RAG: Implement Retrieval-Augmented Generation (RAG) to improve customer interactions with real-time, relevant data.
  • Work with LLMs: Fine-tune and optimize LLM-based workflows for intelligent automation.
  • Enhance API Ecosystem: Design robust RESTful & GraphQL APIs that seamlessly integrate with platforms like Shopify, Klaviyo, Zendesk, and more.
  • Optimize Performance: Ensure low-latency AI-driven responses and a scalable backend architecture.
  • Collaborate & Innovate: Work closely with product, AI, and engineering teams to push the limits of AI-powered customer support.

What Makes You a Great Fit

  • MERN Stack Mastery – Strong experience with MongoDB, Express.js, React, and Node.js.
  • AI & RAG Knowledge – Experience working with OpenAI API, Retrieval-Augmented Generation (RAG), and vector databases.
  • API-First Mindset – Comfortable designing and consuming RESTful & GraphQL APIs.
  • Real-Time Data Processing – Familiarity with WebSockets, event-driven architectures, and async processing.
  • Infrastructure & Scaling – Experience with AWS, Docker, Kubernetes, and microservices.
  • Debugging & Optimization – Strong ability to analyze and optimize backend performance & AI response times.
  • Startup Mentality – Thrives in fast-paced, high-ownership environments and enjoys solving complex problems.

Preferred Qualifications

  • 3+ years of fullstack development experience (MERN or similar).
  • Experience with LLMs, OpenAI API, LangChain, or vector search (Pinecone, Weaviate, FAISS, etc.).
  • Built and scaled production AI-powered applications.
  • Experience with eCommerce, customer support, or chatbot automation is a plus.

Why Join Chatarmin?

  • Shape the Future of AI-Powered CX – Your work will impact thousands of businesses.
  • Remote-First Culture – Work from anywhere with a high-autonomy, async-friendly team.
  • Cutting-Edge AI Work – Build and scale AI-driven customer interactions.
  • Growth & Equity – Competitive salary + meaningful equity in a fast-growing company.
  • Fast-Paced, High-Impact Role – Be a foundational part of a fast-scaling AI startup.

Ready to Disrupt AI Customer Support?

Apply now and let’s build the future of AI-driven customer experiences together!

Apply Now