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Fullstack Data Scientist

Lingaro Group

Poland
Contract
Senior
6+ yrs
Salary not listedPosted 19m ago

Real job — pulled straight from Lingaro Group’s careers page · Verified October 15, 2026 · No reposts.

Job description

Lingaro Group is hiring a Fullstack Data Scientist — a contract, based in Poland role. Apply directly on Lingaro Group's careers page below.

Fullstack Data Scientist - freelancer

Team: Data Science & Applied AI CC

Location: Poland

Commitment: Freelance

Workplace Type: remote

Tasks:

  • Lead discovery and solution design for GenAI use cases, translating business problems into concrete architectures (LLM decision, RAGs, fine-tuning, agents, guardrails).

  • Build end-to-end GenAI applications: data ingestion, retrieval layer, orchestration (e.g. LangChain/LlamaIndex/LangGraph), API/backend, and simple UI where needed.

  • Design and implement RAG pipelines with vector databases, hybrid search, rerankers, query transformation, and evaluation frameworks for relevance and robustness.

  • Perform model selection, prompting strategies, and fine-tuning (LoRA/QLoRA/SFT) for text, code, and multimodal models, including evaluation and A/B testing.

  • Implement safety, compliance, and governance controls (input/output filters, PII handling, audit logs, human-in-the-loop review where required).

  • Collaborate with data engineers, product owners, and full-stack developers on scalable architectures, SLAs, and integration with existing enterprise systems.

  • Gather technical requirements and estimate planned work.

  • Mentor other data scientists/engineers in GenAI patterns, code quality, and best practices; contribute to internal libraries, templates, and reusable components.

  • 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.

  • At least 4+ years of experience in production-ready Python AI-related code development.

  • At least 2+ years of experience in production-ready LLM-related code development, preferably based on the Retrieval-Augmented Generation (RAG) concept.

  • Strong analytical and problem-solving skills with the ability to optimize AI solutions for diverse applications.

  • Strong knowledge and experience in Generative AI, including LLMs, chatbots, AI agents, and RAG mechanisms.

  • Deep understanding of LLM evaluators, validators, and guardrails.

  • Hands-on experience with one or more GenAI frameworks: LangChain, LlamaIndex, LangGraph, or similar orchestration stacks.

  • Hands-on experience designing or operating MCP servers/clients for LLM agents

  • Strong Python skills, including production-grade code, packaging, and testing for data/ML services

  • Solid understanding of ML/AI concepts: types of algorithms, machine learning frameworks, model efficiency metrics, model lifecycle, AI architectures.

  • Proven ability to collaborate effectively across technical and non-technical teams.

  • Familiarity with cloud environments such as Azure (preferred), GCP, or AWS, including AI-related managed services.

  • Familiarity with CI/CD, testing, and containerized deployments.

  • Excellent communication skills in English, with the ability to convey complex technical concepts to various audiences.

 

What Will Set You Apart:

  • Experience in designing and programming ML algorithms and data processing pipelines using Python.

  • Good understanding of CI/CD and DevOps concepts, with experience working with selected tools (preferably GitHub Actions, GitLab, or Azure DevOps).

  • Experience in productizing ML solutions using technologies like Spark/Databricks or Docker/Kubernetes.

  • Experience with agentic AI development frameworks (e.g., BMAD, multi-agent orchestration, spec-driven AI workflows).

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Frequently asked questions

What skills are required for Fullstack Data Scientist at Lingaro Group?

The required skills for Fullstack Data Scientist at Lingaro Group include: Python, Generative AI, LLM, RAG, LangChain, LangGraph, Machine Learning, AI, Azure, GCP, AWS, Docker, Kubernetes, CI/CD, DevOps, GitHub Actions, GitLab, Azure DevOps, Spark, Databricks.

What is the seniority level for Fullstack Data Scientist at Lingaro Group?

Fullstack Data Scientist at Lingaro Group is a Senior level position.

How do I apply for Fullstack Data Scientist at Lingaro Group?

You can view the full description and apply for Fullstack Data Scientist at Lingaro Group on EchoJobs: https://echojobs.io/job/lingaro-group-fullstack-data-scientist-freelancer-xar3k.