Head of AI Engineering
About On The Spot
About the team
You’ll be joining a performance-marketing team that operates as a strategic growth partner for global brands across 25+ industries.
They work at the intersection of data, engineering, and creative, using advanced analytics and tailored strategies to drive conversions.
The team runs full-funnel acquisition programs (search, paid social, emerging channels), continually optimising campaigns and building data-driven insights to allow their clients focus on product development and long-term growth.
About the role
As Head of AI Engineering, you will own the end-to-end AI lifecycle — from research and prototyping to production deployment.
You’ll lead the development of ML models that directly influence funnel performance, ranking, bidding, and creative optimization.
Working closely with product and business teams, you’ll translate high-level goals into actionable ML solutions.
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Responsibilities
- Lead the end-to-end AI roadmap — from problem definition and research to model development, deployment, and continuous iteration in production
- Architect and own scalable ML systems powering ranking, bidding, prediction, and creative optimization workflows
- Drive model performance improvements using rigorous experiment design, online/offline evaluation, and continuous monitoring
- Translate product and business goals into clear ML strategies, identifying where automation, prediction, or optimization can create measurable impact
- Collaborate cross-functionally with Product, Engineering, and Growth teams to define requirements, integrate models, and deliver features that directly affect funnel quality and ROI
- Establish high technical standards for model reliability, inference latency, data quality, and observability across the AI stack
- Mentor and guide ML engineers and researchers, fostering a culture of experimentation, ownership, and high-velocity delivery
- Design and implement scalable data pipelines for feature engineering, real-time inference, and model monitoring
- Oversee the deployment of new models ensuring reproducibility, versioning, CI/CD automation, and robust validation
- Partner with leadership to define long-term AI strategy and ensure AI investments align with product vision and revenue goals
Requirements
- 5+ years experience in applied ML, including hands on model development and deployment
- Deep understanding of the full ML lifecycle: data prep → feature engineering → training → evaluation → deployment → monitoring
- Proven experience building and owning ML systems in production, not only research prototypes
- Strong product intuition — ability to translate business problems into ML formulations
- Experience working with tabular data, predictive models, and optimization systems
- Strong engineering capabilities (Python, SQL, distributed systems concepts)
- Experience leading ML projects end to end in a fast moving environment
- Strong communication skills — ability to work with Product, Engineering, and Business teams
Nice to have
- Prior experience managing or mentoring ML researchers/engineers
- Experience with ranking, recommendation systems, or decision optimization
- Experience building inference microservices and ML infrastructure
- Familiarity with experiment design (A/B, bandits, uplift modeling)
- Background in AdTech, marketplace optimization, or bidding systems
Benefits
- Work in a highly professional team with a friendly and informal atmosphere
- Paid vacation — 20 business days per year, 100% sick leave payment
- Equipment provision
- Partially compensated educational costs (for courses, certifications, professional events, etc.)
- Legal and Accounting support in Poland
- Ability to work from our comfortable office in Warsaw or Minsk
- 5 sick days per year
- Medical insurance (after the end of the probationary period)
- Flexible working hours — we care about you (!) and your output
- English and Polish classes 2 times a week (online)
- Bright and memorable corporate life: corporate parties, gifts to employees on significant dates
Join us
To be considered for this position in Poland, you must have Polish citizenship, a D-type work visa, or a residence permit. Thank you!
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