Senior Data Scientist
This is the employer's own posting, not a copy on a job board.
What we know
Is it still open?
Confirmed still open
Last checked 4h ago — checked against the employer's own applicant tracking system, which is the company answering directly.
We re-read the employer's own applicant tracking system and the posting was still there. That is the company answering directly.
How old is it?
Posted 116d ago
The date the source published, not the day we noticed it (2026-06-17). Last seen at its source just now.
Is it remote?
Marked remote on the employer's board
Their board carries a remote setting on this posting — a field they filled in, not wording we read. The location field names somewhere specific, which is usually where the team or the entity sits.
Who may apply?
Poland, Ukraine, Armenia
The description states no restriction of its own. This is the source's own tag.
Pay not stated
Similar roles pay $96.4k–187.1k/yr
Middle 50% of 38 listings that do state pay — Operations · all levels · Eastern Europe · USD/year. This employer has published no salary; this is what comparable listings we hold disclose, never converted between currencies or periods. How this is calculated.
Skills named in the ad
Recognised terms only, from a fixed vocabulary — this is what CV matching compares against.
Carried by 1 source
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Workable employer's own board first seen 5h ago · last seen just now
The listing
If you’re a talented Data Scientist looking to be part of a fast-growing, innovative R&D team, shape the future of decision-making in business, work on cuttingedge technologies and vast amounts of global real-time data, affect billions of mobile users, and become an industry leader - then let’s talk! Start.io is a mobile data platform that enables organizations to uncover insights and make datadriven decisions that enhance strategies and drive growth. We are seeking a Senior Data Scientist to join our Data Science & Engineering team.
Responsibilities:
- Analyze large and complex data to discover hidden patterns and opportunities;
- Develop and own end-to-end highly scalable data pipelines;
- Develop state-of-the-art machine learning models, and algorithms and build solutions in monetization fields;
- Provisioning data models for real-time (online) processing;
- Shape new data products, and constantly improve the existing products;
- Collaborate with multiple teams including Product, BI, Analysts, DevOps, R&D and Marketing to lead and accomplish overall solutions;
- Oversee a complete release to production, including analyzing requirements, testing, monitoring and measuring results, multitasking, and quickly responding to critical issues.
Requirements:
- B.Sc./M.A/M.Sc. degree in Computer Science, Engineering, Math, Statistics, or other equivalent fields;
- 6 years as a Data Scientist - a strong background in ML concepts and models;
- Hands-on experience with Python, especially with data science ML libraries (regression & classification algorithms e.g. XGB or LGBM, recommendation system algorithms, etc.;
- Understanding of databases and SQL for data retrieval;
- Monitoring and alerting tools (e.g. Grafana, Kibana).
Will be a plus:
- Knowledge in the programmatic advertising landscape – DSPs, SSPs, exchanges – significant advantage;
- Experience with relational (e.g. Vertica, VoltDB) and non-relational (e.g. MongoDB) databases;
- Experience with PMML.
What we offer:
- Help and support from our caring HR team;
- 20 days of vacation;
- Purchase the necessary software.
- Health insurance coverage.
- Multisport coverage (Poland).
- Mobilization reservation available upon successful completion of the probation period (for Ukrainian colleagues).
- The exchange of experience and work with talented colleagues;
- Last but not least - valuable compensation for your efforts.