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Junior Data / ML Analyst

NielsenIQ

Sofia, 23, Bulgaria Hybrid permanent

Posted: April 2, 2026

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Quick Summary

Junior Data / ML Analyst

Job Description

Within the Operations team, the Junior Data / ML  Analyst is responsible for the timely and accurate quality control and delivery of data to the clients. The role ensures that client data is distributed according to contractual agreements and quality standards.

Key Responsibilities:

Data Quality Control

• Perform quality control checks on client deliverables.
• Apply changes to dataset using internal platforms.
• Improve ML training dataset quality.

Data Processing & Analysis

• Report data deviations by providing trend analysis.
• Create or update SQL based queries for automated data monitoring.
• Analyze and suggest improvements for the taxonomy.
• Work effectively with internal platforms and applications.

Collaboration & Communication

• Provide timely solutions to delivery-related issues or client ad-hoc requests.
• Participate in regular brainstorm or retrospective sessions and performance reviews.

Compliance & Confidentiality

• Promote and adhere to global processes and best practices.
• Maintain strict confidentiality of client and internal data.
• Ensure compliance with internal standards and productivity targets.

General & Administrative Duties

• Participate in company-organized training sessions.
• Report system issues that may impact workflow.
• Support team, department, and organizational tasks as needed.

Qualifications

Education

• University degree required.

Technical Skills

• Proficiency in MS Office & MS Outlook
• Is a plus: general acquaintance with Data Analysis, Machine Learning and Computer Science. 
• Strong written and spoken English (B1/B2 level).

Business Knowledge

• Understanding of market and product specifics is an advantage.
• Familiarity with data processing methods, procedures, and tools.

Key Competencies:

Analytical & Technical

• Attention to detail and high-quality standards.
• Ability to understand and analyze data.
• Logical thinking and problem-solving skills.

Communication & Collaboration

• Ability to build productive working relationships.
• Active listening and proactive participation in brainstorming / feedback sessions.

Integrity & Accountability

• Maintains confidentiality and acts with integrity.
• Takes personal responsibility and acknowledges mistakes.

Productivity & Initiative

• Strong time management & self-administration skills.
• Results-driven with persistence and follow-through.
• Works effectively under deadlines and tracks progress.

We offer:

• Food vouchers € 62
• Additional Medical Insurance, incl Prophylactics, Outpatient care, Inpatient care, еxpenses for medications and medical products
• Life Insurance
• Multisport card (self-funded by the employee) 
• A Hybrid model of working: 3 days of the week you work from home (home office), 2 days from the office.
• Additional paid leave of 3 days in case of no overdue leave days from previous year
• Free access to LinkedIn Learning platform

In addition: 

• Working in an international organization, once you become a specialist in your field, you can count on numerous programs offering development or relocation to other departments or countries. Your development is important to us!
•  Stable employment in a dynamic and international environment with an established position on the market.
• Volunteer time off (Global Volunteer Day) 
• Free Employee Assistance Program (EAP) – confidential counselling for emotional well-being 
• Office located close to the city center, easily accessible by public transportation 

 

All documents will be treated in the strictest confidentiality.

Only short-listed candidates will be invited for an interview.

Our Benefits

• Flexible working environment
• Volunteer time off
• LinkedIn Learning
• Employee-Assistance-Program (EAP)

NIQ may utilize artificial intelligence (AI) tools at various stages of the recruitment process, including résumé screening, candidate assessments, interview scheduling, job matching, communication support, and certain administrative tasks that help streamline workflows. These tools are intended to improve efficiency and support fair and consistent evaluation based on job-related criteria. All use of AI is governed by NIQ’s principles of fairness, transparency, human oversight, and inclusion. Final hiring decisions are made exclusively by humans. NIQ regularly reviews its AI tools to help mitigate bias and ensure compliance with applicable laws and regulations. If you have questions, require accommodations, or wish to request human review were permitted by law, please contact your local HR representative. For more information, please visit NIQ’s AI Safety Policies and Guiding Principles: https://www.nielseniq.com/global/en/ai-safety-policies.

About NIQ

NIQ is the world’s leading consumer intelligence company, delivering the most complete understanding of consumer buying behavior and revealing new pathways to growth. In 2023, NIQ combined with GfK, bringing together the two industry leaders with unparalleled global reach. With a holistic retail read and the most comprehensive consumer insights—delivered with advanced analytics through state-of-the-art platforms—NIQ delivers the Full View™. NIQ is an Advent International portfolio company with operations in 100+ markets, covering more than 90% of the world’s population.

For more information, visit NIQ.com

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Our commitment to Diversity, Equity, and Inclusion

At NIQ, we are steadfast in our commitment to fostering an inclusive workplace that mirrors the rich diversity of the communities and markets we serve. We believe that embracing a wide range of perspectives drives innovation and excellence.  All employment decisions at NIQ are made without regard to race, color, religion, sex (including pregnancy, sexual orientation, or gender identity), national origin, age, disability, genetic information, marital status, veteran status, or any other characteristic protected by applicable laws. We invite individuals who share our dedication to inclusivity and equity to join us in making a meaningful impact. To learn more about our ongoing efforts in diversity and inclusion, please visit the https://nielseniq.com/global/en/news-center/diversity-inclusion

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