Full-Stack AI Developer – Engineer

🕒 May 16

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salesHAX Consulting GmbH

WebsiteLinkedInAll Job Openings

11 - 50 employees

Founded 2018

🤝 B2B

💼 Consulting

B2B • Consulting • Sales

salesHAX Consulting GmbH is a leading consulting firm based in Hamburg that specializes in providing personalized 1:1 support to businesses, particularly agencies. With extensive experience working with over 600 service providers, they focus on helping clients increase their customer acquisition, improve sales performance, and optimize business processes. By offering tailored strategies and guarantees for measurable results within three months, salesHAX aims to empower businesses to achieve significant sales growth and operational efficiency through exclusive coaching, workshops, and community engagement.

📋 Description

• RAG-Pipeline & AI: Architecture and development of the server-side RAG pipeline, from query processing through embeddings and vector search to prompt construction. • Full-Stack Development: Build both frontend and backend, ensuring that all LLM API calls are handled strictly server-side. • Subscription & Payments: Integration of a 3-tier subscription model including a 7-day trial via Stripe. • Automation (Data Ingestion): Build 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 limit usage 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 (especially 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 awareness: API keys and rate limits must be strictly handled and enforced server-side. • Ability to work independently within a tight 12-week build-to-launch schedule and proactively align technical decisions with our Project Lead.

🏖️ Benefits

• 100% Remote: Work flexibly from anywhere. • Cutting-Edge Tech: Work on a real, innovative RAG AI system with modern LLMs and a modern tech stack. • Responsibility & Impact: You will play a key role in building a system for a product that will have high visibility after launch. • Efficiency: Short lines of communication directly with the Project Lead. • Opportunity: Option for long-term collaboration for maintenance and further development after a successful launch.