Full Stack AI Developer/Engineer

salesHAX Consulting GmbH

Job

In this role, you will develop an innovative RAG AI system, implement the RAG pipeline, build the full-stack product, and integrate a subscription model including payment processing. Responsible for retention and data analytics.

Job summary

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Job technologies

Your role in the team

  • We are developing an exclusive, subscription-based AI product that provides paying members with conversational access to the documented principles of a well-known personality.
  • This is not a generic chatbot, but a precise Retrieval-Augmented Generation (RAG) system that is based solely on the verified content of our client.
  • RAG Pipeline & AI: Architecture and development of the server-side RAG pipeline, from query processing through embedding and vector search to prompt construction.
  • Full-Stack Development: Building the frontend and backend, ensuring that all LLM API calls remain strictly server-side.
  • Subscription & Payments: Integration of a three-tier subscription model including a 7-day trial via Stripe.
  • You implement robust webhook logic for animal validation directly in the database.
  • Automation (Data Ingestion): Building a pipeline (e.g., via or n8n) that automatically transcribes new audio and video content (Whisper API), cleans, chunks, and loads it into the vector database.
  • Data Intelligence: Development of an internal Behavioral Analytics Dashboard that tracks search queries, emotional tone, content gaps, and limit breaches in real-time.

Our expectations of you

Qualifications

  • Practical knowledge in building RAG systems, managing vector databases (Pinecone or Weaviate), and working with LLM APIs (especially Anthropic Claude Sonnet and OpenAI).
  • Proficient in PostgreSQL (e.g., via Supabase) and authentication solutions such as Clerk or Supabase Auth.
  • High security awareness: API keys and rate limits must be processed and enforced server-side.
  • The ability to work independently within a tight 12-week schedule (Build-to-Launch) and proactively coordinate technical decisions with our Project Lead.

Experience

  • Extensive experience in developing modern full-stack web applications, ideally with our preferred tech stack: Next.js (React) for the frontend and Node.js (Express or Next.js API Routes) for the backend.
  • Experience with secure implementation of Stripe (subscriptions, dunning, webhooks).

What we offer

  • 100% Remote: Work flexibly from anywhere you want.
  • Cutting-Edge Tech: Work on a real, innovative RAG AI system with modern LLMs and a contemporary tech stack.
  • Responsibility & Impact: You are primarily responsible for the system development of a product that will have high visibility after launch.
  • Efficiency: Short communication channels directly with the Project Lead.
  • Perspective: Option for long-term collaboration for maintenance and further development after a successful launch.

Topics you will work on

Job locations

About your employer

salesHAX Consulting GmbH, based in Hamburg, supports companies in implementing sales-oriented growth strategies. Their range of services includes lead generation, process optimization, and customer management. The company was founded in 2021 and is registered in the Hamburg commercial register.

Company type
Established Company
Work model
Full Remote
Industry
Consulting
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Full Stack AI Developer/Engineer

salesHAX Consulting GmbH