Founding Machine Learning Engineer (Recommendations + GenAI)

whizdom.ai; Poland; Hybrid; PLN 60,000 - 90,000; Full time

Benefits offered by this job

Flexible remote environment

Direct access to founders

High ownership role with growth opportunities

Job summary

whizdom.ai is looking for a Founding Machine Learning Engineer in Poland to design and build core intelligence for their AI products. In this role, you will focus on developing models for recommendations and personalisation, working closely with founders to turn product ideas into practical systems. You should have a strong background in ML and Python, with at least 5 years of experience shipping ML features. This position offers a flexible remote environment and direct influence on the company’s direction.

Qualifications

• Strong foundations in machine learning, statistics, or similar discipline.
• 5+ years of experience building ML systems in production.
• Strong Python skills across data, modelling, and evaluation.

Responsibilities

• Design and improve ML systems for recommendations and ranking.
• Turn goals into concrete ML problems and evaluation plans.
• Work closely with data to identify signals and improve models.

Skills

Machine learning foundations

Python programming

Model evaluation

Data quality assessment

Error analysis

Clear communication

Self-direction

Data engineering

Education

Strong foundations in machine learning, statistics, or computer science

5+ years in ML systems

Tools

Large-scale behavioural data

Cloud ML infrastructure

Job description

Join Whizdom.ai as a Founding Machine Learning Engineer to design and build the core intelligence behind everything the company create.

About the company:

Whizdom AI is an early-stage AI startup building products around recommendation systems, personalisation, and GenAI agents. We are a small team working directly on real customer problems, shipping quickly, measuring outcomes, and iterating fast. Everyone here is expected to take ownership, improve systems proactively, and help build the engineering foundations the company will scale on.

The Role:

We are hiring a Founding Machine Learning Engineer to own the intelligence layer of Whizdom AI products. You will design, build, and improve the models and decision systems behind recommendations, ranking, personalisation, retrieval, agent behaviour, and selected predictive analytics use cases. You will work directly with the founders to turn ambiguous product ideas into production systems that create measurable customer value. In a team of the company size, this is an end-to-end role: you may touch data exploration, modelling, evaluation, experimentation, and production iteration in the same week.

This is not a pure research role. We care about people who can move from data and hypotheses to shipped systems and business impact.

What You’ll Own:

• Design, build, and improve ML systems for recommendations, ranking, personalisation, retrieval, and GenAI workflows;
• Turn product goals into concrete ML problems, evaluation plans, experiments, and shipped features;
• Work with behavioural, transactional, contextual, and unstructured data to identify signals and improve model quality;
• Build offline evaluation frameworks and online experiments to measure relevance, quality, latency, cost, and business impact;
• Improve GenAI agent behaviour through better retrieval, context management, prompting, tool use, orchestration, and evaluation;
• Investigate failure modes, run error analysis, and make practical tradeoffs across quality, reliability, speed, and complexity;
• Partner closely with platform and backend engineers to deploy, monitor, and iterate on models in production;
• Help define how Whizdom AI does ML: metrics, experimentation discipline, technical standards, and long‑term direction;
• Work with real‑time behavioural and transactional signals to improve recommendations, personalisation, and intelligent product behaviour;
• Contribute to predictive and insight‑driven ML use cases such as segmentation, churn prediction, recommendation measurement, and opportunity ranking;
• Write clean, testable Python and contribute reusable ML components and shared libraries used across the platform.

What Success Looks Like in the First 6 Months:

• You ship meaningful improvements to a recommendation, personalisation, or GenAI workflow used in production;
• You establish a practical evaluation framework for one or more core ML systems;
• You turn ambiguous product opportunities into clear experiments and sound technical decisions;
• You improve at least one metric that matters, such as relevance, task completion, conversion, retention, latency, or cost efficiency;
• You become a trusted owner who spots high‑leverage ML opportunities and drives them forward without needing detailed instruction;
• You help establish a repeatable approach to experimentation, model iteration, and production‑quality ML development at Whizdom AI.

What We’re Looking For:

• Strong foundations in machine learning, statistics, computer science, or a similar quantitative discipline;
• Experience building and shipping ML systems or intelligent product features in production or near‑production environments;
• Strong Python skills and comfort working across data, modelling, evaluation, and production collaboration;
• Good understanding of experimentation, model evaluation, feature engineering, data quality, and error analysis;
• Clear communication and the ability to work through messy, ambiguous product problems;
• High ownership, self‑direction, and a strong bias toward action;
• 5+ years building and shipping ML systems or intelligent product features in production;
• Strong understanding of model evaluation, cross‑validation, feature engineering, and data quality challenges in real‑world environments;
• Experience working with large‑scale behavioural, transactional, or contextual data;
• Strong software engineering habits, including writing clean, testable, maintainable Python code.

Nice to Have:

• Experience with recommendation systems, ranking, search, personalisation, or marketplace/feed optimisation;
• Experience with LLM applications, RAG, GenAI agents, prompt iteration, or evaluation of GenAI systems;
• Experience running A/B tests or online experiments;
• Experience working closely with product teams and translating user problems into ML solutions;
• Experience with real‑time ML, streaming features, low‑latency inference, or online learning;
• Experience with causal inference, uplift modelling, multi‑armed bandits, or other decision‑optimisation methods;
• Familiarity with cloud ML infrastructure, containerised deployment, and MLOps workflows;
• Experience in iGaming, fintech, e-commerce, or another domain with large‑scale transactional and behavioural data;
• Experience with predictive analytics use cases such as segmentation, churn prevention, LTV modelling, or opportunity prioritisation.

A Note on Fit:

You do not need to match every bullet to apply. We care more about learning velocity, technical judgement, and evidence that you can ship hard things than about perfect keyword coverage or pedigree.

Why Join:

• Direct access to the founders and real influence over the platform and engineering direction;
• High‑ownership role with room to shape the production foundations of the company from the beginning;
• Opportunity to work on the systems behind recommendation engines and GenAI products that customers actually use;
• Flexible remote environment with strong overlap with European time zones preferred;
• Small team, low bureaucracy, and a lot of room to grow.

If you find this opportunity right for you, don't hesitate to apply or get in touch with us if you have any questions!