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Senior AI Data EngineerLuxoft Poland • Poland, Ohio, United States
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Senior AI Data Engineer

Luxoft Poland
  • US
    Poland, Ohio, United States
  • US
    Poland, Ohio, United States
Jetzt Bewerben

Über

Join the Data Engineering team to contribute to the ongoing maintenance and improvement of an internal LLM-powered assistant that uses hosted LLM APIs and internal knowledge sources, with a focus on reliability, retrieval quality, and operational excellence.
Maintain and enhance ingestion/enrichment pipelines for internal content (parsing/extraction, normalization, metadata enrichment, deduplication, and quality monitoring)
Improve indexing and retrieval performance and quality (chunking/segmentation refinements, embedding/index update workflows, metadata filtering, caching) and support hybrid retrieval capabilities (vector + keyword/BM25 + metadata)
Implement and maintain access-aware retrieval by propagating/enforcing document permissions through indexing and query-time filters, including audit logs and validation tests
Improve source attribution so responses reliably point to the correct documents and sections in a consistent format.
Extend and harden tool/workflow execution and automations (scheduled/trigger-based), including retries, timeouts, idempotency, concurrency controls, and run history
Develop and maintain evaluation and regression testing (golden sets, automated scoring) and support structured comparisons across LLM providers/models as required
Operate the platform in production: observability (logs/metrics/tracing), alerting, incident support, performance tuning, and cost controls, plus runbooks and handover documentation
Mandatory Skills 8+ years of hands-on experience in Data Science and 5+ years in Machine Learning, with a proven track record, demonstrated through a robust portfolio of projects.
Strong programming skills in languages such as Python and familiarity building ETL pipelines.
Expertise in SQL and experience with both relational (preferably Postgres) and NoSQL databases (Open Search or Elastic Search)
Familiarity with cloud platforms (e.g., AWS) and their services.
Experience with version control systems (e.g., Git) and CI/CD pipelines.
Ability to build scalable infrastructure to embed and search very large number of documents.
Ability to move fast in an environment where things are sometimes loosely defined and may have competing priorities or deadlines.
Expertise in ML inference optimizations
Solid experience with Hybrid RAG, chunking/segmentation refinements, embedding/index update workflows, metadata filtering, caching, etc.
Knowledge of network optimization for distributed ML training and inference.
Understanding of distributed training patterns and checkpointing strategies.
Strong English skills (B2 and higher)
Strong verbal and written communication skills.
Ability to work independently and collaborate in a group.
Nice-to-Have Skills Agile certification
AWS/Oracle/Microsoft attestations and certifications
Domain knowledge - Trading and Capital Markets
Our Benefits
Stable employment based on an employment contract
Copyright-based remuneration for Developers, resulting in a higher net salary
LuxMed private health and dental care
Life and travel insurance
MyBenefit program (sports card, well-being initiatives, and more)
Employee Assistance Program for you and your family, including psychological consultations, coaching sessions, and support in personal matters
Car rental options
Learning & Development
Access to the LuxTalent platform, offering webinars, training sessions, and certified courses
Internal Mobility Program, enabling rotation between projects, locations, and accounts
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  • Poland, Ohio, United States

Sprachkenntnisse

  • English
Hinweis für Nutzer

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