Lead Data Scientist (AI) (7561)

We are seeking a highly skilled and proactive AI Tech Lead to join our innovative team and spearhead the development of production-level AI agents. The ideal candidate brings a blend of deep technical expertise, hands-on development experience, and proven leadership capabilities in managing cross-functional AI/ML or Data Science teams. You’ll play a key role in architecting intelligent systems, guiding engineers, and pushing the boundaries of applied LLM technologies.

Work at Exadel – Who We Are 

We don’t just follow trends – we help define them. For 25+ years, Exadel has transformed global enterprises. Now, we’re leading the charge in AI-driven solutions that scale with impact. And it’s our people who make it happen- driven, collaborative, and always learning.

About Our Customer

America’s un-carrier delivers an advanced 4G LTE and transformative nationwide 5G network offering reliable connectivity. The brand operates in parts of Europe, but the U.S. is its largest market. The un-carrier’s customers benefit from its unmatched combination of value and quality and unrivaled drive for disruption, creating competition and innovation in wireless and beyond.

Requirements

• Background in building and deploying AI agents or intelligent systems at a production level
• Programming foundation with Object-Oriented Programming (OOP) and API development experience
• Hands-on leadership of a team of 3–4 DS/SE professionals on AI/ML projects – a must
• Proficiency in working with at least two different LLMs (e.g., OpenAI, Claude, Mistral, LLaMA, etc.)
• Familiarity with LangChain and/or LangGraph frameworks
• Ability to clearly articulate how to break down unfamiliar or abstract problems into manageable development tasks
• High-level understanding of transformer architectures and their mathematical principles
• Experience writing clear, user-friendly, and maintainable technical documentation
• Working hours: till 7-8 pm CET

Nice to Have

• Background in data science, MLOps, or AI infrastructure
• Familiarity with prompt engineering, RAG pipelines, or agent-based system design
• Experience working in a fast-paced startup or product-led environment

English level

Upper-Intermediate+

Responsibilities 

• Lead the design, development, and deployment of production-grade AI agents in collaboration with a multidisciplinary team
• Break down complex problems into actionable engineering steps and guide the team through delivery
• Own and manage the full API lifecycle — from design and documentation to integration and maintenance
• Leverage transformer-based models with a high-level mathematical understanding to build scalable AI solutions
• Drive code quality, maintain comprehensive documentation, and support reproducibility and model transparency
• Integrate and experiment with multiple LLMs (Large Language Models) to assess and improve system performance
• Apply frameworks such as LangChain and LangGraph to build modular AI applications
• Collaborate with stakeholders to translate business needs into technical solutions
• Mentor and manage a small team (3-4 Data Scientists/Software Engineers), ensuring alignment and high performance

Advantages of Working with Exadel

Exadel is a global company, and benefits can vary depending on your location and contract type. Your recruiter will provide specific information about the benefits available to you.

• International projects
• In-office, hybrid or remote mode
• Medical healthcare
• Recognition program
• Professional & personal development opportunities
• Foreign languages classes
• Well-being program
• Corporate events
• Sports compensation
• Referral program
• Equipment provision
• Paid vacation & sick days