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AI Engineer

Posted November 20, 2025
Full Time

Job Overview

At Saily, we’re removing the hassle from getting secure data plans while traveling.

No roaming charges, no plastic SIM cards. Just fast, secure mobile data in 200+ countries. Join the team behind Lonely Planet’s #1 eSIM—built for explorers, powered by NordVPN.

Your impact? Helping people stay securely connected, wherever they go.
At Saily, we’re removing the hassle from getting secure data plans while traveling.

No roaming charges, no plastic SIM cards. Just fast, secure mobile data in 200+ countries. Join the team behind Lonely Planet’s #1 eSIM—built for explorers, powered by NordVPN.

Your impact? Helping people stay securely connected, wherever they go.

Main Responsibilities

  • Architect scalable, maintainable backend systems that support Agent integration.
  • Create innovations in a company that is betting early on AI.
  • Collaborate with product teams to define and refine new prototypes and functionalities.
  • Stay updated with the latest developments in LLM (Large Language Models) and AI technologies, integrating them into our products as necessary.
  • Prototype new features and products using Generative AI.
  • Make prototypes that quickly prove the feasibility of solutions, using commercially available APIs and/or local Generative AI models.
  • Optimize prototypical solutions by getting them production-ready through prompt engineering, fine-tuning, etc.

Core Requirements

  • A proactive individual with a strong openness to new ideas and innovations
  • A "can-do" attitude, with the ability to present well-reasoned proposals and make informed decisions based on solid arguments.
  • Proven expertise in implementing Generative AI techniques, including prompt engineering, model fine-tuning, and embeddings for commercial use.
  • Experience with commercially available APIs (e.g., Google, Azure, OpenAI) for text/image generation, embeddings, function calling, fine-tuning, etc., and proficiency in fine-tuning prompts for high-quality outcomes.
  • Proficiency in deploying and optimizing open-source Generative AI models (e.g., LLaMA, Mistral), along with familiarity with related toolchains (e.g., Ollam, LangChain).
  • High curiosity to stay up to date with the state of the art of the fast-moving AI field.
  • Strong skills in Python programming.
  • At least 1-2 years of experience in LLM-related projects.
  • Capable of developing robust RESTful APIs and containerizing applications with Docker.
  • Knowledgeable in Linux and DevOps methodologies, including the use of Git, Jira, and Docker.

Salary Range

  • Gross salary range is 3400 - 6700 EUR/month
What We Offer

Innovate with industry leaders
Work alongside global experts to build world-leading cybersecurity tools, impacting millions of users around the world.

Learn & grow
Boost your skills via our extensive training programs (online and offline) & other resources. Benefit from mentorship and career-switch opportunities to grow within the company. 

Work in a next-gen Cyber City office
Thrive in our bustling office, featuring ergonomic workspaces, modern meeting rooms, engaging events, and specialty coffee to fuel your day.

Hybrid work
Enjoy the flexibility with 3 office days and working from home for the remaining 2.

Work from anywhere
Recharge with a change of scenery – choose work from any location when you feel a need to power your creativity and drive.
 
Physical well-being
Boost your health with free-of-charge 24/7 gym access, onsite and online workouts, and consultations led by in-house Physical Well-Being experts. 

Mental & emotional health
Nurture your mind with free psychologist consultations, dedicated mental health events, and premium access to top-rated wellness apps like Calm, Headspace, and Mindletic.

Premium healthcare
Receive private health insurance giving you peace of mind for your health needs.

Extra days off
Enjoy additional vacation days off as you grow with us. Plus, get extra days for sick leave, special occasions, or parenting needs.
 
Joyful moments – special treats
Celebrate life’s big moments with special gifts from us on your birthday, anniversary, and other major events, such as weddings or the arrival of a new family member.
 
Company events & team-building
Experience iconic Nord Security celebrations, team-buildings, and knowledge-sharing events, nurturing bonds that fuel our success.

Workation
Embark on a legendary company getaway abroad, filled with exciting activities, live concerts, engaging workshops, and epic time together.

Kindly refer to our Privacy Notice for Recruitment Candidates for comprehensive information regarding our data handling procedures throughout recruitment processes: https://bit.ly/40GWyjL

We expect all candidates to provide accurate and complete information during the recruitment process. While limited use of AI tools to refine application materials is acceptable, candidates remain fully responsible for ensuring that their submissions reflect their own qualifications, skills, and experience. Any failure to do so may negatively affect participation in the recruitment process. If broader AI assistance is allowed for a particular role or stage, we’ll let you know in advance.

By submitting your application, you acknowledge that it may be processed using automated tools for evaluation purposes. As part of our recruitment process, we may use an AI-based application review tool to help assess applications based on skills and experience relevant to the role. This technology is used to support - not replace - human decision-making, and every application is ultimately reviewed by a recruiter.
If you would like more information about how AI is used in this process or wish to exercise your rights under applicable data privacy laws, please contact us at [email protected]. Should you prefer to opt out of the automated evaluation, please submit your application directly to [email protected].

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