Fullstack Senior Data Scientist
Lingarogroup, Poland
- Pay
- Not listed by the employer
- Work type
- Remote
- Level
- Senior
- Area
- Data science, ML / AI engineering
- Posted
- Feb 16, 2026
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About the role
Growth through diversity, equity, and inclusion. As an ethical business, we do what is right — including ensuring equal opportunities and fostering a safe, respectful workplace for each of us. We believe diversity fuels both personal and business growth. We're committed to building an inclusive community where all our people thrive regardless of their backgrounds, identities, or other personal characteristics.
What You Will Be Doing: -
Lead discovery and solution design for GenAI use cases, translating business problems into concrete architectures (LLM decision, RAGs, fine-tuning, agents, guardrails).
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Build end-to-end GenAI applications: data ingestion, retrieval layer, orchestration (e.g. LangChain/LlamaIndex/LangGraph), API/backend, and simple UI where needed.
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Design and implement RAG pipelines with vector databases, hybrid search, rerankers, query transformation, and evaluation frameworks for relevance and robustness.
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Perform model selection, prompting strategies, and fine-tuning (LoRA/QLoRA/SFT) for text, code, and multimodal models, including evaluation and A/B testing.
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Implement safety, compliance, and governance controls (input/output filters, PII handling, audit logs, human-in-the-loop review where required).
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Collaborate with data engineers, product owners, and full-stack developers on scalable architectures, SLAs, and integration with existing enterprise systems.
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Gather technical requirements and estimate planned work.
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Mentor other data scientists/engineers in GenAI patterns, code quality, and best practices; contribute to internal libraries, templates, and reusable components.
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Stay current with GenAI landscape (new open and hosted models, agentic frameworks, evaluation techniques) and perform targeted PoCs to validate them.
What We're Looking For: -
6+ years of experience in Data Science/AI engineering.
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At least 4+ years of experience in production-ready Python AI-related code development.
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At least 2+ years of experience in production-ready LLM-related code development, preferably based on the Retrieval-Augmented Generation (RAG) concept.
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Strong analytical and problem-solving skills with the ability to optimize AI solutions for diverse applications.
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Strong knowledge and experience in Generative AI, including LLMs, chatbots, AI agents, and RAG mechanisms.
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Deep understanding of LLM evaluators, validators, and guardrails.
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Hands-on experience with one or more GenAI frameworks: LangChain, LlamaIndex, LangGraph, or similar orchestration stacks.
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Hands-on experience designing or operating MCP servers/clients for LLM agents
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Listed on Lingarogroup's Lever job board; checked 8 h ago. First seen by us 2 days ago. Being listed doesn't mean the team is actively interviewing. We found this board in a public directory and haven't yet confirmed it against the company's own careers page.