Middle/Senior Data Scientist for Advanced Analytics Solutions Team

About Us

DSK Bank is one of the leading banks in Bulgaria, with a strong and growing IT team of over 250 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.

Our team works on diverse and impactful use cases, such as pricing optimization, customer churn prediction, propensity-to-buy models, campaign automation and more. We are also actively exploring the modern AI field and have already developed several RAG applications to stay at the forefront of technological progress.

We are seeking a talented and self-driven professional to enhance our machine learning capabilities with a prime focus on pricing and Next-Best-Action models and keen desire to grow in the field of AI. This is a unique opportunity to make a tangible impact on the future of banking.

Your Responsibilities

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.

Key Qualifications

We’re looking for candidates with:

• 2+ years of hands-on experience in Data Science roles.

• 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.

Nice-to-Have Qualifications

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.

Why Join Us?

We offer:

• Excellent opportunities for professional and career development at one of Bulgaria’s leading banks.

• Competitive salary and annual bonus based on performance.

• Food vouchers worth 200 BGN 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.

• A Refer-a-Friend Bonus program.

• A vibrant location in the heart of Sofia’s city center.