AI Product Engineer / Full-Stack Engineer (m/f/x)

1st Solution AI – Build what comes next.

Artificial intelligence is fundamentally changing how companies work, make decisions and organise processes. The next step is already becoming clear: moving beyond traditional AI applications that support individual tasks towards agentic AI – intelligent systems that can take on tasks independently, interact with other systems, prepare decisions and deliver measurable outcomes alongside people.

That is exactly what we are building our new 1st Solution AI team for in Barcelona.

As a new business unit within 1st solution group, we focus on AI agents, intelligent automation, machine learning and AI-based software development. Our ambition goes beyond building isolated AI features: we want to rethink entire processes and create systems that can take on real work.

A particular focus will be on agentic AI and multi-agent systems. Our vision is to build intelligent workflows and digital teams in which multiple AI agents take on different roles, collaborate with each other, use existing systems and work towards shared objectives.

We want to support our clients across the entire AI value chain – from the initial idea and identifying the right use case through architecture and development to secure production operations. Over time, this will also include consulting and enablement around modern AI and automation platforms as well as our own and client-specific solutions for LLM hosting, AI infrastructure, security and LLMOps.

Especially in enterprise environments, innovation and responsibility have to go hand in hand. For us, AI governance means making the use of AI transparent, secure and controllable – with clear responsibilities, data protection, security and appropriate human oversight.

We also see significant potential for new AI-based services, such as intelligent incident services that detect issues, combine information from different sources and automatically prepare or execute defined actions. Here, we can build on the strong foundation of 1st solution group: more than 25 years of experience, long-standing client relationships and access to complex challenges in large enterprise environments.

What defines us is the combination of startup mentality and enterprise quality. We work pragmatically, collaboratively and with the ambition to understand the real problem behind a requirement. Off-the-shelf solutions are not what we are aiming for – individuality is our standard.

Barcelona will become our development hub and idea lab. We believe in short decision paths, open discussions and teams where strong ideas matter more than hierarchy. We are looking for people we can learn from, who take ownership and who are excited to build something new with us.

If you do not just want to watch AI evolve, but help shape how companies will work with it in the future, we would love to meet you.

• Build complete AI products across frontend and backend
• Create interfaces for AI agents and intelligent workflows
• Integrate LLMs, APIs and enterprise systems
• Build dashboards, conversational, workflow and approval interfaces
• Create fast MVPs and evolve them into robust products
• Work closely with AI engineers, users and clients

• Experience in Full-Stack, Product or Software Engineering
• React, Next.js or similar frontend technologies
• Python, FastAPI, Node.js or comparable backend technologies
• Experience with APIs and databases
• Strong product thinking and a sense for great UX
• Interest or experience in AI- and LLM-powered products

• 30 Days of Annual Leave – Enjoy plenty of time off to recharge and maintain a healthy work-life balance.
• State-of-the-Art Hardware – Work with modern, high-performance equipment and the latest technology.
• Flat Hierarchies – Enjoy direct communication, short decision-making processes, and an open team culture.
• Professional Development – Take advantage of training, learning opportunities, and continuous personal growth.
• Fresh Fruit & Free Water – Stay energized with fresh fruit and complimentary water available at the office.
• Startup Mentality – Experience an agile, hands-on environment with a strong focus on innovation and getting things done.
• Room to Make an Impact – Have the freedom to contribute your ideas, take ownership, and actively shape our products and company.

1st solution. Your Project Partner.

With over 20 years experience in the IT industry and the origins as a systems integrator, 1st solution has established itself as a Top IT staffing service and solution provider in Germany. 1st solution is known as a partner for Consulting, Services and Solutions as well as for Staffing. Whether it is a placement of our own certified consultants and external specialists or the complete takeover of projects and services - the aim of 1st solution is to meet the needs of the customer quickly, flexibly and efficiently.

1st solution offers an innovative & creative working environment, characterised by a young, dynamic team with flat hierarchies. There is ample room for personal  & professional development in the continually growing company.