salesHAX Consulting GmbH

Full-Stack AI Developer, Engineer

salesHAX Consulting GmbH

full-time

Posted on:

Location Type: Remote

Location: Germany

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Salary

💰 €60,000 - €110,000 per year

About the role

  • RAG pipeline & AI: Architect and develop the server-side RAG pipeline, covering query processing, embeddings and vector search through to prompt construction.
  • Full-stack development: Build both frontend and backend, ensuring that all LLM API calls are strictly handled server-side.
  • Subscriptions & payments: Implement a three-tier subscription model including a 7-day trial using Stripe.
  • Automation (Data Ingestion): Create a pipeline (e.g., using Make.com or n8n) that automatically transcribes new audio and video content (Whisper API), cleans it, splits it into chunks, and loads it into the vector database.
  • Data Intelligence: Develop an internal behavioral analytics dashboard that tracks search queries, emotional tone, content gaps, and usage-limit events in real time.

Requirements

  • Deep experience building 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.
  • Practical experience building RAG systems, managing vector databases (Pinecone or Weaviate), and working with LLM APIs (notably Anthropic Claude Sonnet and OpenAI).
  • Proficiency with PostgreSQL (e.g., via Supabase) and authentication solutions such as Clerk or Supabase Auth.
  • Experience securely implementing Stripe (subscriptions, dunning, webhooks).
  • Strong security mindset: API keys and rate limits must be enforced and processed server-side.
  • Ability to work independently within a tight 12-week build-to-launch timeline and to proactively align technical decisions with our Project Lead.
Benefits
  • 100% remote: Work flexibly from wherever you want.
  • Cutting-edge tech: Work on a real, innovative RAG AI system using modern LLMs and a contemporary tech stack.
  • Responsibility & impact: You will be a key contributor to the system architecture of a product that will have high visibility after launch.
  • Efficiency: Short communication lines directly with the Project Lead.
  • Prospect: Option for long-term collaboration for maintenance and further development after a successful launch.
Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools
full-stack developmentRAG systemsvector databasesPostgreSQLStripeAPI developmentdata ingestionbehavioral analyticsNext.jsNode.js
Soft Skills
independenceproactive alignmentstrong security mindsetability to work under tight deadlines