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Date:  23-Nov-2022
Company:  Yettel Bulgaria

Sofia, BG

Data Science Expert



We are Yettel!
Yettel Bulgaria, part of PPF Telecom Group, is a telecommunications company that connects over 3 million customers to people, devices and businesses. Until March 2022, the company operated on the Bulgarian market as Telenor Bulgaria.
We are a company that wants to discover, develop and invest in technology to serve people in the most useful and effective way for them. At Yettel, we believe that a balanced life is a better life. That's why we do everything we can to help people balance the things that matter to them, to make better choices, especially when it comes to technology and its role in our lives.
We want to create the future together with you. That's why we at Yettel are ready to discover and develop your talent and unique skills as we change the world together.


Role overview:
Supports large-scale enterprise-wide projects that incorporate a proactive and innovative solution to addressing business challenges and achieving organizational goals and objectives. Integrates how the big picture of the initiatives comes together from definition through implementation on implications across the business domains.
Key Responsibilities:

  • Implement / improve state of the art data science algorithms supporting business use cases
  • Drives Data Science Roadmap and acts as a liaison between technology, business and privacy
  • Mentors junior team members on best practices and audit their work
  • Drives best in class processes in data modelling and data governance
  • Ensure effective stakeholder engagement and communications. 
  • Ensures timelines are adhered to for initiatives by keeping executives aware of any red flags concerning the timing or integration process.
  • Support Yettel’s business initiatives through a data centric approach to problems/intiatives


  • Master’s degree in economics, Management, Statistics, Mathematics, Informatics or similar
  • Experience - minimum 5 years of experience in data analysis out of which at least 3 years in building data science
  • Previous experience working in a complex IT environments
  • Proficiency in RDBMS/SQL 
  • Proficiency in Python (focusing on data science toolkit)
  • Expertise in model selection techniques, feature engineering techniques, model monitoring
  • Solid mathematics/computer science or statistics showing good grasp of predictive models’ underlying structure and assumptions
  • Working knowledge on Linux for data engineering tasks 
  • An advantage would be working knowledge of Spark, Hive/Impala, and NoSQL databases
  • An advantage would be a working knowledge of building data pipelines (e.g. Airflow) 
  • Fluency in English


Our offer:

  • Positive workplace culture where you would receive all the support you need from your peers and managers in order to achieve your personal and team goals
  • Annual bonus based on your personal performance
  • Preferential prices for mobile devices and accessories
  • Unlimited mobile services and mobile internet
  • Flexible working hours
  • Monthly food and gift vouchers
  • Transportation allowance
  • Additional health insurance




Join Yettel now by sending us your up-to-date CV. 

Only shortlisted applicants will be contacted with information about next steps of our selection process.

Applicants are treated with strict confidentiality following the applicable personal data protection legislation.  



Apply now »