Mid/Senior ML Engineer (DS) for Advanced Analytics Solutions Team

DSK Bank is one of the leading banks in Bulgaria, with a strong and growing IT team of over 350 talented professionals. Our Advanced Analytics and AI Department is at the forefront of technological innovation, building cutting-edge machine learning platform and models to drive data-driven decision-making across the organization.

About the team:

We are a startup-like, full-stack team building production ML models and LLM-based agents inside one of the leading banks in Bulgaria.

Our work ships to real customers. If you use the mobile app or website, you’re likely interacting with systems we built, such as:

• An AI assistant (with upcoming capabilities to analyze real-time transactions and provide personalized financial guidance).
• Real-time product ranking that adapts instantly to your explicit feedback.
• Optimal interest-rate pricing for cash loans.
• AI-powered search engine for the website.
• And other ML/AI products across the bank.

We are growing and looking for a self-driven, results-oriented ML/DS professional who enjoys production-grade challenges with large-scale impact.

We value strong ML foundations more than prior “AI agent” experience: we believe it’s easier to teach agent frameworks than it is to build robust, monitored, production-ready ML models.

As part of our team, you will:

• Develop and deploy machine learning models for various business use cases.
• Own the entire lifecycle of models, from research and development to production and maintenance.
• Design and automate model development lifecycles to reduce time-to-production and ensure scalability.
• Conduct proof-of-concept analysis to assess the feasibility of machine learning solutions for new business challenges.
• Participate in the development of LLM AI Agents and RAG Bots.

We’re looking for candidates with:

• 3+ years / 2+ years for Senior / Middle of hands-on experience in Machine Learning.
• A solid foundation in mathematics, statistics, machine learning algorithms, metrics, and loss functions.
• Advanced expertise in Python and its ML ecosystem (NumPy, pandas, scikit-learn, XGBoost, CatBoost, Seaborn, Matplotlib, etc.).
• Strong skills in SQL and Spark, including advanced features like complex joins, subqueries, CTEs, and window functions.
• Proficiency in writing clean, efficient, and scalable Python code.
• Verbal and written English proficiency at Upper Intermediate level or above.

While not required, the following will make you stand out:

• Experience with Azure Databricks, MLflow, and Airflow for model development and deployment.
• Keen interest in cutting-edge AI fields such as LLM RAG (Retrieval-Augmented Generation) and agentic applications.
• Familiarity with deep learning frameworks like PyTorch, TensorFlow, or Keras for future projects.

What we offer to you:

• Cutting-edge tech stack on par with top global IT companies.
• Dev-to-Prod in a few clicks via our in-house ML & AI platforms.
• Unique opportunity to build and productionize modern AI apps.
• Competitive salary and annual bonus based on performance.
• Food vouchers worth 102,26 EUR per month.
• 20 + 5 days of paid holiday leave.
• Comprehensive additional health insurance.
• Preferential conditions for mortgages, loans, and other banking products.
• Access to Multisport/CoolFit cards at discounted rates.
• Discounts with partner companies.
• Internal academies to help you grow professionally.

If you are challenged by this opportunity, please send your detailed CV.

Only short-listed candidates will be contacted. All applications will be treated in strict confidentiality.