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Lingaro Group

Fullstack Data Scientist - freelancer

LocationPoland
Work moderemote
Typecontract
SeniorityLead
Experience6+ yrs
DepartmentCC Data Science & Applied AI, Data Science & Applied AI CC
Company size1,001–5,000 people
First seenOct 10, 2026 · 1d ago
Verified live1d ago
At a glanceSummarised by Seekless from the posting.
Must have14
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
Nice to have4
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)
Skills
Python
LangChain
LlamaIndex
LangGraph
LLM
RAG
vector databases
LoRA
QLoRA
SFT
Azure
GCP
AWS
Docker
Kubernetes
Spark
Databricks
GitHub Actions
GitLab
Azure DevOps
MCP
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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