D ONE is a premium consultancy specialized in data, AI, and transformation. We help organizations turn ambition into impact by aligning strategy, building strong data foundations, delivering high-impact solutions at scale, and ensuring adoption and trust through governance and people focus.

From Zurich, Munich, and Athens, we support clients across Europe with deep expertise along the entire data value chain. Our approach is pragmatic, people-centric, and built for lasting value.

In this role you will design and build end-to-end AI-powered applications for our clients: from backend logic and data pipelines to polished user-facing interfaces. Based in our consulting hub in Athens, you will work with your project team to deliver the high quality and reliability we are known for.

Your tasks will include:

• Analyzing requirements and designing tailored full-stack AI solutions
• Building and integrating end-to-end applications spanning frontend interfaces, backend services, APIs, and AI/ML components
• Developing and deploying generative AI features, including LLM integrations, RAG pipelines, and AI agents
• Presenting results and prototypes to stakeholders and management
• Occasionally traveling to Switzerland and internationally to meet clients and collaborate with our team at headquarters in Zurich

What you bring:

• University degree in Computer Science or related fields
• Strong proficiency in full-stack development, including frontend frameworks (e.g. React, Vue) and backend technologies (e.g. Python, Node.js, REST/GraphQL APIs)
• Hands-on experience building and integrating AI/ML models and LLM-based applications (e.g. using OpenAI, Anthropic, LangChain, or similar)
• Familiarity with cloud development and deployment in at least one of the following platforms: Azure, AWS, GCP
• Experience with databases (relational and/or vector databases) and data handling fundamentals
• Down-to-earth and pragmatic, result-oriented attitude
• Excellent communication skills in English

What we offer:

• An uncomplicated and low noise environment that enables to focus on what matters most.
• An international team of talented people from diverse backgrounds that have ambitions, always enjoy an additional challenge, and know how to have fun at work.
• Further development opportunities through our D ONE Academy including mentoring program, knowledge sharing sessions, expert and working groups, as well as tailor-made soft-skill and leadership training.
• Frequent offsite socializing events.

To be successful in this role you will need to:

• Strive to understand your clients' needs.
• Deliver outstanding results with high business value in a comprehensible form.
• Have the intellectual agility required to get the job done in an easy-to-do-business-with way.
• Value clever and creative team play.

Are you interested in joining a great team with a proven track record and to work on projects that will constantly challenge you?

We are happy to receive your application with reference:

D ONE Value Creation AE
Stamatis Stefanakos
Mourouzi 10
Athens 106 74