Lazaros Koutsianos - Machine Learning Engineer & Data Scientist with a focus on Retrieval Augmented Generation

Q: Where is Lazaros based?

Lazaros is based in Augsburg, Germany .

Q: What languages does Lazaros speak?

Lazaros speaks the following languages: Greek (Native), German (Advanced), English (Advanced) .

Q: How many years of experience does Lazaros have?

Lazaros has at least 8 years of experience. During this time, Lazaros has worked in at least 11 different roles and for 1 company . The average length of individual experience is 1 year and 9 months . Note that Lazaros may not have shared all experience and actually has more experience.

Q: What is Lazaros's latest experience?

Lazaros's most recent position is RAG Webinar: Deep Dive and Use Cases at SHI GmbH .

Q: What companies has Lazaros worked for in recent years?

In recent years, Lazaros has worked for SHI GmbH .

Q: Which industries is Lazaros most experienced in?

Lazaros is most experienced in industries like Information Technology (IT) , Education , and Manufacturing . Lazaros also has some experience in Banking and Finance , Retail , Media, and Entertainment and Publishing .

Q: Which business areas is Lazaros most experienced in?

Lazaros is most experienced in business areas like Information Technology (IT) , Product Development , and Business Intelligence . Lazaros also has some experience in Operations , Quality Assurance (QA) , and Research and Development (R&D) .

Q: Which industries has Lazaros worked in recently?

Lazaros has recently worked in industries like Information Technology (IT) , Education , and Manufacturing .

Q: Which business areas has Lazaros worked in recently?

Lazaros has recently worked in business areas like Information Technology (IT) , Product Development , and Business Intelligence .

Recommended expert

Augsburg, Germany

Experience

Jun 2025 - Jun 2025

1 month

Augsburg, Germany

RAG Webinar: Deep Dive and Use Cases

SHI GmbH

Design, preparation and delivery of a webinar on 'RAG in Practice: How publishers create real value with AI'
Preparing technical and strategic content on Retrieval Augmented Generation (RAG) for a mixed audience from the publishing industry
Presenting specific use cases, technical backgrounds, common challenges and solution approaches when using RAG
Providing practical insights into data preparation, model selection and output optimization in the context of digital publishing portals
Conceptual and technical preparation of the webinar
Selecting and presenting practical use cases from the publishing environment
Developing technical backgrounds for implementing RAG systems
Presenting and explaining typical challenges and solution strategies
Large Language Models (LLMs)
Retrieval Augmented Generation (RAG)

Jan 2025 - Dec 2025

1 year

Augsburg, Germany

POC delivery and concept development for a RAG-based chatbot

SHI GmbH

Creating a POC where customers can interactively evaluate parameters for a RAG-based chatbot
Creating a concept document for implementing a RAG-based chatbot
Technical responsibility for selecting RAG components (chunking, retrieval, embedding model, LLM) and prototyping in Python
Vectorizing and storing data in a vector database
Creating and optimizing the system prompt using prompt engineering
Testing and deploying local LLMs
Creating a concept document with all technical requirements and infrastructure components for chatbot implementation – both with open source and proprietary models
ML-Ops
Python
Pytorch
LLMs
Hugging Face
Ollama / vLLM / llama.cpp
Langchain
LlamaIndex
Chroma, Elasticsearch, Apache Solr
SentenceTransformers
OpenAI Embeddings
Hugging Face Transformers
Flask

Dec 2024 - Jan 2025

2 months

Augsburg, Germany

Author / Co-author: White paper on Retrieval Augmented Generation

SHI GmbH

Researching and writing a white paper on Retrieval Augmented Generation as the author for an internal project
Co-authoring another white paper in cooperation with the German Publishers and Booksellers Association
Presenting technology basics, use cases, as well as opportunities and challenges of RAG in a professional information environment
Researching, structuring and developing the content of the texts
Clearly presenting technical concepts for a mixed professional audience
Coordinating with co-authors and aligning the content for joint publication
Bringing in practical knowledge from previous projects to illustrate use cases
Large Language Models (LLMs)
Retrieval Augmented Generation (RAG)

Aug 2024 - Present

1 year 8 months

Augsburg, Germany

RAG-based chatbot

SHI GmbH

Implementing a chatbot based on the principle of Retrieval Augmented Generation
Answers based solely on provided documents
Technical responsibility for selecting RAG components (chunking, retrieval, embedding model, LLM) and prototyping in Python
Vectorizing and storing data in a vector database
Creating and optimizing the system prompt using prompt engineering
Evaluating the model responses and iteratively improving the result quality
Testing and deploying local LLMs
Supporting the practical implementation of the chatbot
ML-Ops
Python
Pytorch
LLMs
Hugging Face
Ollama / vLLM / llama.cpp
Langchain
LlamaIndex
Chroma, Elasticsearch, Apache Solr
SentenceTransformers
OpenAI Embeddings
Hugging Face Transformers
Flask

Mar 2024 - Apr 2024

2 months

Augsburg, Germany

Log file analysis

SHI GmbH

Building an analysis system with Elasticsearch, Logstash and Kibana to improve search functionality in the online shop
Using Apache Solr logs and web server logs as analysis basis
Configuring Solr to log the required data at INFO level
Installing Elasticsearch, Logstash and Kibana
Configuring Logstash including defining suitable Grok patterns for indexing Solr logs
Defining an ingest pipeline in Elasticsearch to determine geo information based on provided IP addresses
Analyzing sample data for Solr and web logs and creating appropriate mappings in Elasticsearch as well as data views in Kibana
Creating and assembling visualizations on dashboards in Kibana
Apache Solr
Elasticsearch
Logstash
Kibana

Jan 2024 - Present

2 years 3 months

Augsburg, Germany

Member of Search & Analytics Team

SHI GmbH

Jan 2024 - Mar 2024

3 months

Augsburg, Germany

Dense Vector Search

SHI GmbH

Comparison of traditional text-based search results with vector search results in Apache Solr 9
Implementation and documentation of a demo version for the "Dense Vector Search" feature
Evaluation of suitable machine learning models from Hugging Face to generate vectors for vector search
Implementation of methods to create vector representations of test data
Configuration of schema and request handlers and formulation of search queries in Apache Solr for using Dense Vector Search
Apache Solr
Python
PyTorch
Pandas
pysolr

Aug 2023 - Jan 2026

2 years 6 months

Augsburg, Germany

Machine Learning-based Anomaly Detection in Production Processes

SHI GmbH

Design and implementation of a machine learning model for automated detection of anomalies in production data
Identification of quality deviations based on process data
Advising on data-driven optimization of manufacturing processes
Analysis and preprocessing of sensor data from production equipment (temperature, pressure, vibration, cycle time)
Development and comparison of anomaly detection models (Isolation Forest, One-Class SVM)
Validation of detected anomalies using historical quality and scrap data
Visualization of identified process deviations over time and presentation of results
Python
scikit-learn
Pandas
NumPy
Seaborn
SQL

May 2023 - Jul 2023

3 months

Augsburg, Germany

Data Integration

SHI GmbH

Improving and consolidating financial data
Integrating SAP data into CCH Tagetik
Creating concept documents
CCH Tagetik

Jun 2020 - Jul 2023

3 years 2 months

Augsburg, Germany

NLP-based Classification of Service and Error Reports

SHI GmbH

Development of an NLP-based model for automatic classification of technical incident reports and error descriptions from a maintenance management system
Identification of recurring error types to support maintenance strategy
Improving the analysis of unstructured data
Text preprocessing (tokenization, lemmatization, stopword filtering)
Feature extraction using TF-IDF and n-grams
Training a text classification model for error classification
Model comparison (Logistic Regression, SVM, Naive Bayes)
Integration of the model into an internal monitoring system
Python
scikit-learn
spaCy
NLTK
Pandas
Matplotlib

Feb 2018 - May 2023

5 years 4 months

Augsburg, Germany

Web Development & Linguistics

SHI GmbH

Localization and optimization of software for users of different languages
Optimization of PHP code and creation of HTML web pages for software and the online shop
Independent development of HTML web pages
Preparation of translations for the language course content and the online shop
Voice actor for language courses, voicing all Greek translations
PHP
HTML

Industries Experience

See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.

Experienced in Information Technology (7.5 years), Education (5.5 years), and Manufacturing (2.5 years).

Information Technology

Education

Manufacturing

Business Areas Experience

The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.

Experienced in Information Technology (7.5 years), Product Development (7 years), Business Intelligence (5.5 years), Operations (2.5 years), Quality Assurance (2.5 years), and Research and Development (1 year).

Information Technology

Product Development

Business Intelligence

Operations

Quality Assurance

Research and Development

Summary

Lazaros has a strong analytical mindset and the ability to quickly dive into new topics and technologies. He brings analytical thinking, quick comprehension, and a high level of initiative. Through his academic and professional career, he has learned to look at tasks from different angles and critically question existing processes. He works efficiently both in teams and independently and keeps an overview even in new or challenging situations.

Skills

Information Retrieval & Retrieval Augmented Generation
Large Language Models & Natural Language Processing
Machine Learning & Deep Learning
Data Engineering & Ml-ops
Semantic & Hybrid Search In Vector Databases
Search & Big Data Technologies, Especially Apache Solr And Elasticsearch
Translating Business Requirements Into Technical Solutions
Python
Html
C++
Sql
Unix Command Line Tools
Shell Scripts
Latex
Windows
Linux
Macos
Apache Solr
Elasticsearch
Langchain
Llamaindex
Pandas
Numpy
Spacy
Apache Nifi
Pytorch
Logstash
Embeddings
Llmops
Mlops
Ollama
Prompt Engineering
Prompt Injection
Vector Stores
Vllm
Git
Googleads
Jira
Cpm Software Cch Tagetik
Pysolr
Kibana
Ci/cd
Cuda (Nvidia)
Docker
Gitops
Jenkins
Mysql
Pycharm
Visual Studio Code
Overleaf
Texmaker
Implementation Of Retrieval Augmented Generation Systems
Development And Integration Of Retrieval Infrastructures
Improving And Optimizing Search-driven Applications
Dataflow Management, Data Processing & Analysis
Application Of Machine Learning Methods (Clustering, Classification, Recommendations)
Natural Language Processing
Management-level Documentation & Presentations
Training Sessions On Artificial Intelligence
Keynote Speaker At Several Public Events

Languages

Greek

Native

German

Advanced

English

Advanced

Education

Ludwig-Maximilians-Universität München

Bachelor of Science · Computational Linguistics · Munich, Germany

Ludwig-Maximilians-Universität München

Bachelor of Arts · History and Archaeology · Munich, Germany

Certifications & licenses

Elastic Certified Engineer

Profile

Created

March 2026

Need a freelancer? Find your match in seconds.

Try FRATCH GPT

Frequently asked questions

Do you have questions? Here you can find further information.

Where is Lazaros based?

Lazaros is based in Augsburg, Germany.

What languages does Lazaros speak?

Lazaros speaks the following languages: Greek (Native), German (Advanced), English (Advanced).

How many years of experience does Lazaros have?

Lazaros has at least 8 years of experience. During this time, Lazaros has worked in at least 11 different roles and for 1 company. The average length of individual experience is 1 year and 9 months. Note that Lazaros may not have shared all experience and actually has more experience.

What roles would Lazaros be best suited for?

Based on recent experience, Lazaros would be well-suited for roles such as: RAG Webinar: Deep Dive and Use Cases, POC delivery and concept development for a RAG-based chatbot, Author / Co-author: White paper on Retrieval Augmented Generation.

What is Lazaros's latest experience?

Lazaros's most recent position is RAG Webinar: Deep Dive and Use Cases at SHI GmbH.

What companies has Lazaros worked for in recent years?

In recent years, Lazaros has worked for SHI GmbH.

Which industries is Lazaros most experienced in?

Lazaros is most experienced in industries like Information Technology (IT), Education, and Manufacturing. Lazaros also has some experience in Banking and Finance, Retail, Media, and Entertainment and Publishing.

Which business areas is Lazaros most experienced in?

Lazaros is most experienced in business areas like Information Technology (IT), Product Development, and Business Intelligence. Lazaros also has some experience in Operations, Quality Assurance (QA), and Research and Development (R&D).

Which industries has Lazaros worked in recently?

Lazaros has recently worked in industries like Information Technology (IT), Education, and Manufacturing.

Which business areas has Lazaros worked in recently?

Lazaros has recently worked in business areas like Information Technology (IT), Product Development, and Business Intelligence.

What is Lazaros's education?

Lazaros holds a Bachelor in Computational Linguistics from Ludwig-Maximilians-Universität München and a Bachelor in History and Archaeology from Ludwig-Maximilians-Universität München.

Does Lazaros have any certificates?

Lazaros has 1 certificate: Elastic Certified Engineer.

What is the availability of Lazaros?

Lazaros is immediately available for suitable projects.

What is the rate of Lazaros?

Lazaros's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.