Full-Stack AI Developer – Engineer

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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

• Architecture and development of the server-side RAG pipeline, from query processing through embeddings and vector search to prompt construction • Building the frontend and backend with strictly server-side LLM API calls • Integration of a 3-tier subscription model, including a 7-day trial via Stripe • Implementation of robust webhook logic for tier validation directly in the database • Building an automated pipeline for transcription, cleaning, chunking and storage of new audio and video content in the vector database • Development of an internal behavioral analytics dashboard for search queries, emotional tone, content gaps and limit usage in real time • Independent work within a 12-week build-to-launch timeline • Proactively aligning technical decisions with the Project Lead

🎯 Requirements

• Deep experience building modern full-stack web applications • Preferably experience with Next.js (React) on the frontend and Node.js (Express or Next.js API Routes) on the backend • Practical experience building RAG systems • Experience managing vector databases such as Pinecone or Weaviate • Experience working with LLM APIs, particularly Anthropic Claude Sonnet and OpenAI • Confident with PostgreSQL, e.g., via Supabase • Experience with authentication solutions such as Clerk or Supabase Auth • Experience securely implementing Stripe subscriptions, dunning and webhooks • Strong security awareness; API keys and rate limits must be handled and enforced server-side • Ability to work independently within a tight 12-week build-to-launch schedule • Ability to proactively coordinate technical decisions with the Project Lead

🏖️ Benefits

• 100% remote: Work flexibly from anywhere • Work on an innovative RAG AI system with modern LLMs and a modern tech stack • Significant responsibility and high impact in building the system • Short communication lines directly with the Project Lead • Option for long-term collaboration for maintenance and further development after a successful launch