Senior AI Engineer

Senior AI Engineer, Gaurdsix

Location: Copenhagen. On-site full-time.

As a Senior Software Engineer within our AI team, you will design, develop, and deploy advanced AI models and systems that solve complex business challenges. You’ll collaborate with a cross-functional team to translate AI research into scalable, production-ready solutions. This is a hands-on role where you’ll work on everything from LLM-based, ML or other AI techniques, ensuring our AI initiatives deliver measurable impact.

About the team

We are looking to join our AI Team, known as the Growth Catalyst Team, a fast-moving AI unit focused on delivering customer-facing AI features. The team owns the full lifecycle: identifying customer problems, crafting rapid solutions, and bringing them to market in six-month delivery cycles. Structured for speed and innovation, the group operates with exploratory cycles and a strong commercial lens, continually adapting to market opportunities every half-year.

The team is cross‑functional, bringing together product management skills, UX design, and diverse AI, data science, and engineering competencies. The team is focused on customer‑driven discovery, rapid delivery, and the development of AI- and LLM‑centric capabilities through close cross-disciplinary collaboration.

What’s in it for you?

Join a fast-paced, high-impact role at the intersection of Cybersecurity and AI. You’ll work alongside some of the brightest minds in a domain that’s rapidly evolving, where AI enhances defence and threat detection in real time. Expect a dynamic, challenging environment as the race between defenders and attackers accelerates—from cutting-edge research to real-world, production-grade solutions. If you’re passionate about AI and security, this is the place to make a measurable difference, shape the future of cyber defence, and ride the wave of explosive growth in both fields.

Key Responsibilities

• Develop and deploy Generative AI solutions, including LLM and SLM fine-tuning and optimisation.

• Build retrieval pipelines using vector databases and orchestration frameworks (e.g., LangChain, SciPy, or PyTorch).

• Collaborate with engineering teams and integrate AI into existing products.

• Monitor, evaluate, and continuously improve AI systems in production.

• Stay current with AI trends and recommend innovative approaches.

Competencies / Requirements

Expected Skills & Qualifications

• 5+ years of experience in engineering or data science

• Proficiency in Python and familiarity with frameworks like SciPy, PyTorch or other data science/machine learning libraries

• Hands-on experience with LLMs, context engineering, and fine-tuning techniques

• Experienced with building Agentic AI to enable LLM to solve concrete problems

• Knowledge of cloud platforms (AWS, Azure)

• Strong problem-solving skills and the ability to work in a collaborative environment

• Bachelor’s or Master’s degree in Computer Science, Engineering, or related field
  

Nice-to-Have

• Experience with deploying SLMs in customer environments, balancing compute needs with other essential services, including optimising the throughput of the SLM

• Familiarity with ethical AI principles and bias mitigation

• Exposure to cybersecurity or Security Operations-related AI applications

Why you would love working at Guardsix:

We’re on a growth journey, and we offer a challenging and exciting international work environment on the cutting edge of cybersecurity technology. We strive to deliver outstanding results in a positive, collaborative, and inclusive atmosphere with great opportunities for personal growth and development.

At the heart of everything we do is our values: Collaboration, Passion and Impact. These values are not just words but our way of living. By design, we push to create a culture that is dynamic, positive, and contagious. Where each person can show up as their true self, knowing they are valued, heard, and respected.

Get to know Guardsix:

Headquartered in Copenhagen, Denmark, with offices across Europe, the USA, and Asia, guardsix is a multinational and multicultural cybersecurity company. GuardSix safeguards society in a digital world by helping customers and Managed Security Service Providers (MSSPs) detect cyberattacks. Combining reliable technology with a deep understanding of cybersecurity challenges, we make security operations easier, giving organisations the freedom to progress.

We’re on a mission. We want to detect every cyberattack. It’s a bold mission. Some might even say it cannot be done. We’re aiming to prove otherwise. Guardsix's SIEM and NDR technologies improve visibility and give a multi-layered approach to cybersecurity that helps customers and MSSPs navigate the complex threat landscape.

Sound Interesting?

Does this role sound ideal for you? Then, please apply using the apply link. We encourage you to apply early, as we review applications on an ongoing basis, and will hire the right candidate as soon as we meet them!

The Recruitment Process:

1) Screening Interview with the recruiter, Christian Payne (30 minutes, online)

2) Hiring Manager Interview (1 hour, online)

3) Tech Interview with Case (1hr 30, onsite)

4) Possible last step to meet the team in person (1hr, onsite)