Viktor Tönköl

[Telefonnummer nur mit Premium sichtbar], [E-Mail-Adresse nur mit Premium sichtbar]

English - fluent, German - fluent

Experienced (15+ years) in building distributed Data, IoT, AI enabled systems

Extensive work with Apache Spark/Databricks and Python, and in the telecom, bank and insurance fields.

Sure, Machine Learning (ok AI) is nice, but

AI on ALL your data is nicer,

All that in Real-Time is the nicest.

 AZ-204: Developing Solutions for Microsoft Azure

 Amazon Web Services Developer.

 Amazon Web Services Solutions Architect

 Amazon Web Services Machine Learning Specialty

 Machine Learning by Stanford University

 Software Processes and Agile Practices by University of Alberta

Expert knowledge (10+ years): Python/IoT/Data Engineer/Machine-Learning-AI Engineer/Data Science

(Deep Neural Networks (Keras/tensorflow, LSTM), LLM/OpenAPI/LangChain/chatAPI/image processing, scikit-

learn, NumPy, pandas, Jupyter Notebook, Flask (microservices), matplotlib, Folium, plotly, networkx),

IoT/Realtime/Streaming: Event based systems, MQTT, RabbitMQ, Apache Kafka, Web (Django, HTML, CSS,

Javascript) Machine Learning (Movement analytics, predictive, anomaly detection, classification and regression

models), Big Data (Databricks, Hadoop, HDFS, Apache Spark (PySpark), YARN, Ambari, Hive, Impala), SQL

Databases (Oracle, PostgresSQL / PostGIS, InfluxDB, MySQL), Reporting (PowerBI, Tableau, TM1 Cubes), NoSQL

(MongoDB, ScyllaDB, Redis, Elastic Search), Architect (Big Data Platform design, Distributed/Multilayer

application design, Presentation and technology research), Leadership (hiring, contract negotiations, mentoring,

team building, business requirements and technical implementation bridging, Agile, Scrum, TDD), Other tools,

CI/CD (VSCode, Intellj, PyCharm, Sonar, Grafana, git, Gitlab, jira, confluence, Jenkins, Linux, Docker, Kubernetes)

Cloud: Azure (Databricks, Container Applications, DevOps, SQLServer, Storage, App Services), AWS (EC2, S3, ECS

(Docker), EMR (Spark, Hive), Lambda, SageMaker / AI / cognitive Services, Speech), GCP AI Stack Vertex AI,

Gemini, Cloud Run

Advanced knowledge (5+ years): GeoSpacial Programming/Tools: QGis, networkX, Web(NodeJS, Vue.js), Golang

(microservices), Infrastructure Management (Terraform / OpenTofu, Terragrunt, Ansible),

Differential Privacy, Bloom filters, GPU/ CUDA (LSTM, RNN, CNN), Snowflake, Windows Scripting (powerShell),

Compliance- und Security-Standards: SOX

Technologies

Self-employed. –Data, IoT Engineer / Machine Learning Engineer / IT Architect

2025 main projects

 CIG Pannonia Insurance

Role: AI Architect & Team Lead – Real Time Recommendation Engine

Design and implement a recommendation system embedded in customer facing insurance portal

Private Cloud & Azure – real-life challenges of powering recommendations using limited data

Technologies: Azure, Docker, scikit-learn, MLFlow, Azure DevOps

 Telefónica (o2)

Role: Lead Engineer for IoT Machine Learning platform, Data Engineering

From Azure to GCP-AI-native migration technologies

CRM customer retention use-cases, GenAI at scale isolated, 1 hour setup Enterprise grade chat agents

Technologies: Azure, GCP, Databricks, Reporting, Keras/Tensorflow, LangChain, Pyspark, Azure DevOps

 Telefónica (o2)

Role: Lead Engineer for IoT Machine Learning platform, Data Engineering

GCP Databricks integrations SAP, Azure SA, ADLS, postgeSQL, SQLServer

Initial infrastructure setup support, validation, automation

Technologies: Azure, GCP, Databricks, Pyspark, MLFlow

 info-tech solutions GmbH und KG

Role: Lead Engineer for IoT Machine Learning platform, Data Engineering

Complete IoT platform migration from Strato Cloud to Hetzner Cloud

Real time IoT for heavy-vehicle position and metric collection, 45M+ events per day.

Technologies: Strato, Hetzner, Python, IoT, MQTT, Ansible

2024 main projects

 Telefónica (o2)

Role: Lead Engineer for Machine Learning platform, Data Engineering

CRM Time-Series Data Anomaly Detection using Databricks Azure cloud-native technologies

Technologies: Python, Azure, Databricks, Reporting, MLFlow, Azure DevOps, Apache Kafka

 Franz Habisreutinger GmbH & Co. KG

Role: Lead Architect & Engineer for Data Analytics Platform, Data Engineering

Design & implement real-time integration of: ERP, Retail Logistics, Product Warehouse data

Real Time combined reporting of Financial Booking data and Retail Logistics

Technologies: Python, Databricks, Spark, Pyspark, Databricks Delta, Reporting, Terraform, Rabbit MQ

 info-tech solutions GmbH und KG

Role: Lead Engineer for IoT Machine Learning platform, Data Engineering

Near-Real time aggregated statistics based on IoT events.

Real time IoT for heavy-vehicle position and metric collection, 45M+ events per day.

Technologies: Azure, GCP, Databricks, Spark, Pyspark, MLFlow, Azure DevOps, Apache Kafka

Major Projects, Experiences

2023 main projects

 Henkel GmbH

Role: Enterprise Cloud Architect

Discover and Consolidate Data Platform Architecture to Azure cloud, Synapse Analytics

Retail Product Packaging Solutions

Technologies: Azure, CICD, Solution Architect, Container Apps, Supabase, Terraform, Reporting

 Franz Habisreutinger GmbH & Co. KG

Role: Lead Architect & Engineer for Data Analytics Platform, Data Engineering

Design & Implement cost effective processing billions of records: ERP, Retail Logistics, Product Warehouse

Batch Data Integration, Reporting & Insights: in-house controlling reports

Technologies: Python, Databricks, Spark, Pyspark, Databricks Delta, Reporting, Terraform, Rabbit MQ

 Telefónica (o2)

Role: Lead Engineer for Machine Learning platform, Data Engineering

AI platform migration to Azure cloud-native technologies

Technologies: Python, AWS, Azure, Databricks, Spark, Pyspark, Kubernetes, MLFlow, CICD, Apache Kafka

2022 main projects

 Telefónica (o2) - Engineer for Machine Learning platform, Data Engineering

Tasks: Complete AI platform migration from on-premise Hadoop to Azure Databricks, involving design and

coordination of migrating 20+ AI/ML models.

Technologies: Python, AWS, Azure, Databricks, Terraform, Spark, Kubernetes

 info-tech solutions GmbH und KG – Architect / Lead Developer

Tasks: IoT sensor processing at scale - DevOps support, Web development, Data Engineering, System Architect

Technologies: Python, Strato Cloud, PostgreSQL, VueJs, Django, Kubernetes

2021

 Telefónica (o2) - Lead Engineer for Machine Learning platform, Data Engineering

Technologies: Python, AWS, Azure, Databricks, Spark, Kubernetes, Keras/Tensorflow

2020

 BEMAS - Belgian Maintenance Association Hackathon 1

st prize

Tasks: Anomaly detection and predictive maintenance.

https://www.aquafin.be/en/news-0/gemsotec-wins-the-hackathon-predicting-pump-failures

Technologies: Python, AWS, Machine Learning, scikit-learn, Keras/Tensorflow

 Excubate GmbH

Task: Consultancy on Full Stack web app

Technologies: Linux, MongoDB, NodeJs, Vuejs, VPS

 Chatbot development

Task: Rasa Chatbot Development

Technologies: Rasa, AWS, Docker, AWS ECS

 Foreign Language Learning Platform

Task: Design and Development of an MVP

Technologies: GCP, Docker, Kubernetes, NLP, Text2Speech

Motionlogic Gmbh. – Senior Developer > Head of Data Processing > Head of Development

[Telefonnummer nur mit Premium sichtbar]

Technologies: Python/Data Engineer, IoT, AWS, Hadoop, Machine Learning, Apache Kafka, SQL and NoSQL

Databases, Leadership, QGis, Tableau, Other tools, Apache Airflow, CI/CD. See technology details above.

 Mentoring and Personal Development of Junior and Senior Colleagues

Tasks: form personalised learning path

 Viavi - https://www.viavisolutions.com/de-de

Tasks: 4G data integration

 Telia Company - https://www.teliacompany.com/en

Tasks: System setup and run in Sweeden, Finland, Norway. Technical contact in various integration projects.

Airflow

 T-Systems Hungary - https://www.t-systems.hu/home-page

Tasks: System integration and setup for Hungary. Leader and main technical contact in various integration

projects

 Tank and Rast - https://tank.rast.de/en.html

Tasks: provided highway reouted traffic counts. Technical leader and solution architect.

 Ströer - https://www.stroeer.com/

Tasks: provided near-realtime demografic counts. Technical leader and solution architect.

 BVG - https://www.bvg.de/willkommen

Tasks: provided U-Bahn section, entrance/exit, transition counts. Technical implementation lead.

 MVG - https://www.mvg.de/

Tasks: provided U-Bahn section, entrance/exit, transition counts. Technical implementation lead.

 PTV - https://www.ptvgroup.com/en/

Tasks: provided traffic data for simulation. Integration developer.

 UNIBAIL-RODAMCO-WESTFIELD - https://www.urw.com/

Tasks: provided Shopping center analitics. Senior developer, integration developer.

 VisitBerlin - https://www.visitberlin.de/en

Tasks: provided tourist information. Technical leader and solution architect.

 Anomaly Detection on Data Streams

Tasks: detecting out of normal (including seasonality) KPI values

 Data Pipeline Scheduling Framework evaluation-

Tasks: most suitable scheduling framework, Airflow, Nifi, Spotify Luigi.

Danubius Expert Ltd. – Senior Developer / Lead Developer

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Technologies: Java, SQL and NoSQL Databases, Leadership, Other tools, CI/CD. See technology details above.

 Mentoring of Junior Colleagues

Tasks: form personalised learning path, Bsc and Msc Thesis consulting

 Raiffeisen Bank – Retail Information Portal – Lead developer

Tasks: lead developer, scrum master

Technologies: WebSphere Application Server, Hibernate, JAX-RS, AngularJs, Elastic search

 Etalon-Informatics Bank/Insurance Product Catalog and CRM

Tasks: lead developer, 5 member team coordination, item based product recommendation & customer

segmentation

Technologies: Spark, JavaEE, JAX-RS, AngularJs, Hibernate,

 KBC / K&H Bank Ltd. – Apollo Project – Integration Architect

Tasks: design system integrations based on high level business requirements

Systems: CRM, Deposit, Account, Core systems (Equation)

Skills: Communication, Problem solving, proactive attitude

 KBC / K&H Bank Ltd. – Apollo Project – Workflow Framework & Process Development

Tasks: jBPM based workflow framework design and implementation; business process development

Technologies: WebLogic Application Server, JMS, jBPM

 Erste Bank – WSO2 service catalog installation & customization

Tasks: design, consultancy, implementation, production support

Technologies: WSO2 Service Registry (Governance Registry)

 Generali Providencia Ltd. – Integration Cockpit development

Tasks: service registry design, consultancy, lead developer

Technologies: Eclipse, JavaEE, Vaadin, Hibernate

 Generali Providencia Ltd. – Substitute management and LDAPAdmin development

Tasks: specification, design, implementation, production support, IBM Process Server integration

Technologies: ZKoss, Hibernate, WebSphere Application Server, WebSphere Process Server

 Allianz Hungária Ltd. – Allianz Agent Portal project

Tasks: functional specification, system design, lead developer and coordinator, release management,

production support

Technologies: WebSphere Application Server, WebSphere Portal Server, Vaadin

 Allianz Hungária Ltd. – Mobile Travel Insurance and Fee Payment

Tasks: functional specification, system design, lead developer and coordinator, release management,

production support

Technologies: WebSphere Application Server, Android and iOS

 EGIS Ltd. – www.egis.hu site implementation on WebSphere Portal

Gondoland LLC 2008 – 2009

Full Stack Developer (student)

Technologies: PHP, SQL, Java, CI/CD. See technology details above.

BSc in Computer Engineer

Budapest University of

Technology and Economics

[Telefonnummer nur mit Premium sichtbar]

MSc in Business Information Technologist

Budapest University of

Technology and Economics

[Telefonnummer nur mit Premium sichtbar]