Full-Stack AI Developer – Engineer

🕒 September 21

🇩🇪 Germany – Remote

💵 €60k - €110k / year

⏰ Full Time

🟡 Mid-level

🟠 Senior

🤖 AI Engineer

👻 Ghost score 6%

What it means: the chance that no one is really hiring for this job.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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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

• Architect and develop the server-side RAG pipeline, from query processing, embedding, and vector search through to prompt construction. • Build the frontend and backend while ensuring that all LLM API calls remain strictly server-side. • Integrate a three-tier subscription model, including a 7-day trial, via Stripe. • Implement robust webhook logic for tier validation directly in the database. • Build an automated pipeline that transcribes new audio and video content via the Whisper API, cleans it, splits it into chunks, and loads it into the vector database. • Develop an internal behavioral analytics dashboard for real-time monitoring of search queries, emotional tone, content gaps, and limit usage. • Align technical decisions with the Project Lead.

🎯 Requirements

• Extensive experience developing modern full-stack web applications, ideally using 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, particularly Anthropic Claude Sonnet and OpenAI. • Strong proficiency with PostgreSQL (e.g., via Supabase) and authentication solutions such as Clerk or Supabase Auth. • Experience securely implementing Stripe, including subscriptions, dunning, and webhooks. • Strong security awareness: API keys and rate limits must be processed and enforced strictly on the server side. • Ability to work independently within a tight 12-week build-to-launch schedule and proactively align technical decisions with the Project Lead. • GitHub profile and relevant RAG or full-stack references are optional.

🏖️ Benefits

• 100% remote: Work flexibly from anywhere. • Cutting-edge technology: Work on a genuinely innovative RAG AI system using modern LLMs and a modern tech stack. • Responsibility and impact: Play a key role in building a product that will have high visibility after launch. • Efficiency: Short communication channels with direct access to the Project Lead. • Long-term prospects: Opportunity for ongoing collaboration on maintenance and further development after a successful launch.

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