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Lead AI Engineer
Lead AI EngineerMedium • Krakow, WI, US
Lead AI Engineer

Lead AI Engineer

Medium • Krakow, WI, US
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Overview

Are you a visionary engineer with a passion for building AI that empowers small businesses? We are seeking a Lead AI Engineer to help translate our ambitious vision into tangible, impactful AI products. You will be helping shape the next generation of agentic AI systems, influencing our technical direction, and collaborating with a talented team to make enterprise-level AI accessible to SMBs worldwide.

This is a pivotal role for someone to turn academic breakthroughs into practical business solutions. If you have a proven track record of working on scalable ML platforms to achieve groundbreaking innovation, this is your opportunity to democratize AI and create a lasting impact for businesses that form the backbone of the world's economy.

On a typical day, you might :

  • Architect our foundational AI data platform and MLOps pipelines, ensuring enterprise-grade scalability, reliability, and performance.
  • Design the end-to-end development of production-ready agentic systems, from proof-of-concept through to deployment and continuous improvement at scale.
  • Drive innovation in our LLM capabilities through advanced RAG implementations, fine-tuning strategies, and RLHF, while leading research into emerging AI technologies.
  • Collaborate with product, engineering, and other cross-functional leaders to ensure the seamless integration of AI models and influence the company's strategic roadmap.
  • Work with a high-impact team of data scientists and engineers, fostering a culture of technical excellence and translating complex AI insights into clear business strategies.

The ideal candidate will bring :

  • 6+ years of experience building and deploying sophisticated machine learning solutions, with deep expertise in agentic systems, NLP, or deep learning.
  • A proven ability to build scalable data pipelines and ML platforms that support high-volume model training and inference.
  • Expert-level proficiency in the Python ecosystem (e.g., scikit-learn, TensorFlow, PyTorch, Hugging Face) for both research and production systems.
  • Hands-on experience with RAG architectures, model fine-tuning, RLHF, comprehensive evaluation frameworks, and drift detection systems.
  • Advanced SQL skills and expertise in data warehousing, ETL processes, and data governance best practices.
  • Experience with cloud platforms (AWS, GCP, or Azure) and distributed computing frameworks (Spark or Dask).
  • Exceptional skill in translating complex technical concepts into clear business strategies and actionable insights to influence senior stakeholders.
  • A passion for democratizing access to advanced technology and an appreciation for the unique challenges SMBs face in adopting AI.
  • This is an exciting time to join ActiveCampaign as we build out our new office in Poland. You will be a large part of developing our office culture in this new Krakow hub location.

    About ActiveCampaign

    ActiveCampaign is an AI-first, end-to-end marketing platform for people at the heart of the action. It empowers teams to automate their campaigns with AI agents that imagine, activate, and validate–freeing them from step-by-step workflows and unlocking limitless ways to orchestrate their marketing.

    With AI, goal-based automation, and 950+ app integrations, agencies, marketers, and owners can build cross-channel campaigns in minutes–fine-tuned with billions of data points to drive real results for their unique business.

    ActiveCampaign is the trusted choice to help businesses unlock a new world of boundless opportunities–where ideas become impact and potential turns into real results.

    As a global multicultural company, we are proud of our inclusive culture which embraces diverse voices, backgrounds, and perspectives. We don't just celebrate our differences, we believe our diversity is what empowers our innovation and success. You can learn about our DEI initiatives.

    Perks and Benefits

    At ActiveCampaign, we prioritize employees' well-being and professional growth by cultivating a culture centered on collaboration and innovation. When you join our team, you'll not only have the opportunity to make a significant impact, but also enjoy a range of benefits tailored to support your personal and career development.

    Here are some of the benefits we offer :

  • Comprehensive Health & Wellness : Top-tier benefits package that includes medical and dental benefits paid 100% by ActiveCampaign for you and 50% for your dependents, and reimbursements on vision expenses. In addition, employees receive complimentary access to telehealth services, and a free subscription to Calm.
  • Growth & Development : Access to LinkedIn Learning, professional development programs, and career growth opportunities in a fast-growing organization.
  • Generous Paid Time Off : Recharge and take the time you need to maintain work-life balance.
  • Total Rewards : Pension scheme with matching up to 1.5% of your contribution, MultiSport Plus card to support your active lifestyle, home office stipend to cover your commuter or work from home expenses, and a four-week paid sabbatical with bonus after five years.
  • Collaborative Culture : Work alongside brilliant, passionate colleagues in an environment that values innovation, teamwork, and mutual support.
  • ActiveCampaign is an equal opportunity employer. We recruit, hire, pay, grow, and promote no matter of gender, race, ethnicity, sexual orientation, marital status, political opinion, national origin, social origin, parentage, workers union membership, economic status, religion, age, health condition, disability or any other grounds protected by law.

    Our Employee Resource Groups (ERGs) strive to foster a diverse inclusive environment by supporting each other, building a strong sense of belonging, and creating opportunities for mentorship and professional growth for their members.

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    Lead Ai Engineer • Krakow, WI, US

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