Lead AI Engineer / Architect

About RiraTec
RiraTec is a team of senior technical specialists for AI, security, hardware, and software. We pair engineers who have a decade or more of hands-on experience with virtual AI employees: autonomous agents that run inside our clients' workflows. No juniors, no account-management layer. We measure success by outcomes, not hours billed.
The role
We are looking for a Lead AI Engineer / Architect to join this group. You will design and build agentic systems for our clients, and you will own them from the first architecture sketch to production. This is a hands-on role: you set the technical direction and you write the code. The position is full-time and fully remote.
What you will do
• Architect and build production agentic systems: multi-agent orchestration, tool use, memory, retrieval, evaluation, and guardrails
• Design the enterprise software around the agents, across backend services, APIs, data layers, and the frontends people actually use
• Deploy AI where the client needs it: in the cloud, on-premise, or air-gapped on local hardware
• Lead client engagements technically, from the discovery call through architecture, delivery, and handoff
• Make the calls on models, frameworks, and infrastructure, and be able to explain the trade-offs to engineers and executives alike
• Raise the bar for the team through design reviews, code reviews, and mentoring
What you bring
• 10+ years of professional software engineering, including time as a senior, lead, or architect
• Extensive hands-on experience building agentic systems on LLMs and shipping them to production, not only prototypes
• Strong full-stack background in enterprise solutions: backend services and APIs, modern frontend frameworks, and cloud infrastructure
• Solid grounding in RAG, evaluation, observability, and the cost and latency trade-offs of running LLM systems at scale
• A security mindset, and experience with integrating AI into existing enterprise systems and data
• Fluent German and English, written and spoken. Both are required
• Clear communication and the confidence to work directly with clients
What we offer
• Salary of €150,000+ per year, depending on experience
• A full-time, fully remote position
• Hard, varied problems across industries, from startups to enterprises
• A small team in which every colleague is a senior specialist
• Real ownership of architecture and technical decisions
If you have spent the last decade building serious software and the last few years building agents that work in production, we would like to talk.

Work arrangement
Yes