Lead LLM Engineer Join TDC NET and help us build and scale advanced agentic systems. At TDC NET, we are leaders in Denmark's digital infrastructure, dedicated to technical excellence, sustainability, and continuous improvement in an ever-evolving industry. Our team is developing robust LLM systems that drive internal automation and decision support, making a significant impact within the organization.

About the job

You will be the specialist on LLM architecture, agent design, and best practices, directly involved with coding and setting the technical direction for the company's LLM initiatives. Leading the design and development of agentic workflows, you will make key decisions on models, orchestration, and infrastructure, while establishing standards for reliability, security, and performance. Expect to engage in prototyping, pair programming, and meticulous engineering, helping other teams efficiently deliver solutions.

As a crucial member of an innovative product team—including a Product Manager, Platform Engineer, and LLM developers with GenAI experience—you'll create a collaborative environment focused on collective learning, creating valuable user-centric products, and enjoying the process.

What You will Be Doing with us

You will take charge of building production-grade LLM systems that empower internal automation and decision support:

• Design and implement agentic systems including planning/execution loops, tool usage, memory, and multi-agent patterns.
• Be highly skilled in LLM orchestration encompassing LangGraph/LangChain/MCP, routing strategies, function/tool calling, and safe tool integration.
• Build solid RAG pipelines focusing on indexing strategies, retrieval quality, evaluations, and latency/cost optimizations.
• Integrate with our stack through APIs, internal services, databases, and event-driven workflows, establishing clear contracts and service level agreements (SLAs).
• Work with the processes including containerization, Kubernetes deployment, GPU sizing, autoscaling, and observability (metrics, traces, logs).
• Establish GenAI engineering standards like prompt/version management, offline/online evaluations, AB testing, guardrails/safety, and incident playbooks.
• Drive review by setting patterns, running design reviews, and contributing reusable components.
• Stay current and pragmatic by assessing new techniques and adopting those that deliver measurable value.

"Our LLM agents are built to make real decisions easier for real people. You'll work close to the problem, shape the solution, and see your work land across the company to support Denmark’s digital backbone", says Jesper Wass, Director, AI Application Engineering, TDC NET.

 

About you

Who we are looking for

Must-haves:

• Collaborative colleague, motivated to share knowledge and explore the unknown.
• 1+ year building and shipping LLM-powered systems (RAG, workflows, agents) to production and 3+ years in software/backend/ML
• LangGraph/LangChain, MCP, or similar frameworks in production.
• Skilled in Python and engineering practices (Gitlab CI/CD, testing, observability).
• Experience with LLM orchestration concepts: tool/function calling, workflow graphs, memory/state, retries/timeouts, and evals.
• RAG in practice: indexing strategies, retrieval quality, latency/cost tuning, and offline/online evaluation.
• Reliability mindset: tracing/metrics/logging, performance tuning, incident response, and guardrails/safety. 

Nice-to-haves

• Educational background in Machine Learning or Natural Language Processing
• Deploying to cloud/container platforms; comfortable with Kubernetes basics and securing integrations.
• GPU-aware deployment and right-sizing models to latency/cost constraints.
• Azure AI Foundry and on-prem Ollama model deployment experience. 

Why you’ll enjoy working with us

• Be part of a supportive, creative, and diverse team environment.
• Engage with cutting-edge technologies and substantial datasets.
• Collaborate with passionate AI enthusiasts.
• Contribute to developing intelligent automation in a strategic area.
• Contribute to Denmark's digital infrastructure and innovation.

Contact:

If you have questions about the position or want to know more about what it means to work at TDC NET, feel free to reach out to Jesper Wass, Head of AI Application Engineering, at +4529474492.

Location:

Teglholmsgade 1, Copenhagen or Sletvej 30, Aarhus

Process:

We invite candidates for interviews on a continuous basis, so please apply as soon as possible and no later than 23 February 2026. 

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You can expect to hear from us within 3 weeks from the application date.

Click here to read more about TDC NET and how it is to work at us.

You apply via ”Apply now” in the top left corner.

 

We encourage you not to include a photo in your resume or motivational letter. In TDC NET we are dedicated to fostering an inclusive culture that values diversity, and we pride ourselves on providing equal opportunities for everyone. All qualified candidates will be assessed regardless of ethnicity, religion, gender, gender identity, sexual orientation, disability and all the other characteristics that make us different.

We are looking forward hearing from you!

Engage in meaningful work

The green transition needs a strong digital infrastructure. With us you will take part in delivering the technological solutions.

For all of us.

We provide the working life of the future

We set targets for a healthy and safe working environment.

Our work culture is digital and flexible when compatible with tasks and colleagues.

Welcome to your new hybrid workplace.

Development through challenges - get lots of responsibility from day one

Get responsibility quickly and be a part of the biggest transformation in our field - ever.

Be challenged.

Become part of a strong network

Take part in connecting Denmark together with both new and experienced colleagues and many various professional competencies.

In TDC NET we are both motivated and united by a strong network.

Our values

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