Fullstack Senior Data Scientist

LI Fullstack Senior Data Scientist
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Lingaro Group is a global data and analytics consulting company that partners with Fortune 500 brands and enterprises to drive digital innovation through data strategy, AI, and digital commerce solutions across 30+ countries.
Lingaro
Employee count: 1001-5000
Poland only

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We are looking for a skilled and experienced Fullstack Data Scientist with solid expertise in Generative AI (GenAI) to lead projects focused on building and implementing advanced systems based on Large Language Models (LLMs), chatbots, AI agents, and Retrieval-Augmented Generation (RAG) mechanisms. As a Senior Data Scientist, you will be responsible for designing, implementing, and optimizing GenAI solutions, as well as mentoring teams. Your knowledge and experience will be crucial in making architectural decisions, selecting technologies, and implementing best practices in AI-driven development.
Tasks:
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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:
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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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Strong Python skills, including production-grade code, packaging, and testing for data/ML services

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

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

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

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

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

What Will Set You Apart:
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Experience in designing and programming ML algorithms and data processing pipelines using Python.

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

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

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

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About the job
Apply before
Oct 15, 2026
Posted on
Aug 16, 2026
Job type
Full Time
Experience level
Senior

Experience

6 years minimum

Location requirements
Suggest an edit

Poland

Hiring timezones
Show UTC offsets

Poland +/- 0 hours

Job categories
Data Science and Applied AI CC CC Data Science and Applied AI Data Scientist Generative AI Engineering LLM Engineering Senior Full Stack Data Scientist Senior Full Stack AI Engineer Full Stack Engineer AI ML Engineer

Skills
Generative AI Large Language Models AI Agents with Retrieval Augmented Generation (RAG) Lang Chain LlamaIndex LangGraph Python Vector Databases Azure GCP AWS CI CD Docker Kubernetes Chatbot AI Agents MCP Fine Tuning LoRAs QLoRA Gitlab GitHub Actions Databricks Azure DevOps GuardRails GitHub Agentic AI

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About Lingaro

Learn more about Lingaro and their company culture.

View company profile

Lingaro Group is a global technology company that serves as the end-to-end data services partner to worldwide brands and enterprises. Founded in 2008 and headquartered in Warsaw, Poland, the company has grown into an industry leader in data, analytics, digital transformation, e-commerce, and digital marketing. With over 1,500 business experts and technical innovators operating across more than 30 countries, Lingaro creates solutions that realize the full value of data for more than 100 billion-dollar brands and over 75 top-selling consumer-packaged goods companies.

The company's impressive track record includes generating $200 million in cloud cost savings for clients and enabling $50 billion in data-driven revenue. Lingaro manages 2 trillion data records globally and has delivered over 500 business intelligence solutions. Recognized by leading research and advisory firms including ISG, Everest Group, and Gartner, Lingaro is a trusted Google Cloud Partner and has been named a Leader in Specialty Analytics Services and Generative AI Services. The company's commitment to excellence has earned it Fortune 100 Europe recognition and multiple Great Place to Work® certifications across regions including Poland and Asia.

Tech stack

Learn about the tools and technologies that Lingaro uses to build, market, and sell its products.

View tech stack

Node.js

Spring

Next.js

Python

Java

FastAPI

Linux

Kubernetes

Jenkins

GitHub Actions

MySQL
9 more

Lingaro employees can create an account to update this tech stack.

Employee benefits

Learn about the employee benefits and perks provided at Lingaro.

View benefits
Insurance Benefits

Comprehensive insurance coverage for employees and their families.

110+ Training Sessions

Regular training sessions, knowledge sharing, and community webinars.

Udemy Learning Platform

Unlimited access to online learning and professional development courses.

Retirement Benefits

Retirement planning and pension programs for long-term financial security.

View Lingaro 's employee benefits

Apply now
Job expired?

Please let Lingaro know you found this job on Himalayas. This helps us grow!
Apply now

About the job
Apply before
Oct 15, 2026
Posted on
Aug 16, 2026
Job type
Full Time
Experience level
Senior

Experience

6 years minimum

Location requirements
Suggest an edit

Poland

Hiring timezones
Show UTC offsets

Poland +/- 0 hours

Job categories
Data Science and Applied AI CC CC Data Science and Applied AI Data Scientist Generative AI Engineering LLM Engineering Senior Full Stack Data Scientist Senior Full Stack AI Engineer Full Stack Engineer AI ML Engineer

Skills
Generative AI Large Language Models AI Agents with Retrieval Augmented Generation (RAG) Lang Chain LlamaIndex LangGraph Python Vector Databases Azure GCP AWS CI CD Docker Kubernetes Chatbot AI Agents MCP Fine Tuning LoRAs QLoRA Gitlab GitHub Actions Databricks Azure DevOps GuardRails GitHub Agentic AI

Browse similar jobs
Remote Senior Data-Science-and-Applied-AI-CC Jobs Remote Full Time Data-Science-and-Applied-AI-CC Jobs Remote Senior Data-Science-and-Applied-AI-CC Jobs in Poland Remote Full Time Jobs in Poland Remote Data-Science-and-Applied-AI-CC Jobs in Poland

Claim this profile LI Lingaro

Company size

1001-5000 employees

Founded in

2008

Chief executive officer

Sam Mantle

Markets
Business Intelligence Data and Analytics Services Digital Transformation Consulting Cloud Computing and Cloud Migration Google Cloud Partner Ecosystem Data Engineering and Data Management Generative AI Services E commerce Technology and Services Digital Marketing and MarTech Services IT Consulting and Technology Services

Employees live in
Poland

View company profile

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