Tobias Lewen - Data Engineer

Q: Where is Tobias based?

Tobias is based in Berlin, Germany and prefers 100% remote projects.

Q: What languages does Tobias speak?

Tobias speaks the following languages: German (Native), English (Advanced), Russian (Advanced) .

Q: How many years of experience does Tobias have?

Tobias has at least 2 years of experience. During this time, Tobias has worked in at least 3 different roles and for 3 different companies . The average length of individual experience is 1 year and 6 months . Note that Tobias may not have shared all experience and actually has more experience.

Q: What is Tobias's latest experience?

Tobias's most recent position is Data Engineer at unitb consulting GmbH .

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

In recent years, Tobias has worked for unitb consulting GmbH , mylantech GmbH , and DKB AG .

Q: Which industries is Tobias most experienced in?

Tobias is most experienced in industries like Banking and Finance , Media and Entertainment , and Information Technology . Tobias also has some experience in Pharmaceutical .

Q: Which business areas is Tobias most experienced in?

Tobias is most experienced in business areas like Information Technology , Business Intelligence , and Strategy .

Q: What is Tobias's education?

Tobias holds a Master in Economics from Freie Universität Berlin .

Q: Does Tobias have any certificates?

Tobias has 4 certificates . Among them, these include: Microsoft Certified: Azure Data Engineer Associate , Microsoft Certified: Azure Fundamentals , and Microsoft Certified: Fabric Data Engineer Associate .

Recommended expert

Berlin, Germany

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Experience

Oct 2025 - Present

10 months

Berlin, Germany

Data Engineer

unitb consulting GmbH

Tasks: Design and operation of end-to-end cloud data platforms for enterprise clients in publishing and finance, including infrastructure automation, pipeline development, monitoring, and data quality.

Activities:

Built multi-layer data architectures on Databricks (Apache Spark, Delta Lake), BigQuery, and GCP
Fully automated cloud infrastructure with Terraform across 3 environments (DEV/STG/PRD)
Developed automated data pipelines with Python, dbt, and GCP services for different data sources
Built monitoring and alerting systems for real-time platform monitoring
Implemented data versioning and quality checks at every layer
Designed automated test and deployment pipelines in GitLab and Bitbucket

Achievements:

2× production data processing capacity, reduced spike response time from minutes to ≤15 s, server errors ≈ 0
Replaced 3,000 lines of manual configuration with a reusable automation module for 7 customer domains, configuration errors to 0
Delivered a complete end-to-end data platform at ~€10/month infrastructure cost
Migrated 7 database tables with 0 downstream issues
Removed 100% exposed credentials, eliminated external vendor dependency
Delivered integration of 3 teams in 1 sprint

May 2025 - Oct 2025

6 months

Munich, Germany

Analytics Engineer

mylantech GmbH

Tasks: Design and delivery of scalable Azure data platforms for enterprise clients, including pipeline automation, reporting, and strategic consulting between IT and management.

Activities:

Designed and deployed Azure data architectures with Azure Data Factory, Azure Synapse Analytics, ADLS Gen2, Azure SQL, and Microsoft Fabric
Built automated data pipelines for end-to-end data integration and transformation
Developed interactive Power BI dashboards with advanced DAX for multiple departments
Independently developed cloud-based data solutions from concept to production
Translated technical requirements into data strategies for C-level stakeholders

Achievements:

Reduced data integration processing time by 50% through pipeline automation with Azure Synapse and ADLS Gen2
Reduced data warehouse load time by 25% for enterprise clients
Increased customer acquisition by 13% through improved product traceability
Implemented Europe-wide pharma product tracking, reduced delivery time by 20%

Oct 2023 - Mar 2024

6 months

Berlin, Germany

Trainee Business Analytics

DKB AG

Tasks: Support of data-driven analysis processes in a banking environment with a focus on fraud detection, data quality, and stakeholder reporting.

Activities:

Analyzed transaction patterns to identify anomalies and risk factors using Oracle SQL and Python
Developed automated test scripts in Python to validate data pipelines
Created complex ad-hoc SQL queries for structured stakeholder reporting
Documented technical data workflows in Confluence
Integrated workflows in Git and GitLab, including CI/CD pipeline debugging

Achievements:

Direct contribution to fraud detection by identifying anomalies in 2 cases worth €250,000
Reduced manual processing time in analytical workflows by 1 hour/day through automated test scripts
Technical documentation enabled knowledge transfer across cross-functional teams

Industry Experience

See where this freelancer has spent most of their professional time.

Experienced in Banking and Finance, Media and Entertainment, Information Technology, and Pharmaceutical.

Banking and Finance

Media and Entertainment

Information Technology

Pharmaceutical

Business Area Experience

See which departments and functions this freelancer has contributed to most.

Experienced in Information Technology, Business Intelligence, and Strategy.

Information Technology

Business Intelligence

Strategy

Summary

Data Engineer, 3+ years, building cloud-native data platforms on GCP and Azure for enterprise clients in publishing and finance. Stack: Python, SQL, dbt, Terraform, Kubernetes. Results: 2× ingest capacity, 50% shorter integration times, 13% profit increase through data traceability.

Skills

Python
Sql
Dbt
Terraform
Azure
Gcp
Databricks
Airflow
Bigquery
Fabric
Power Bi
Dax
Gitlab Ci/Cd

Languages

German

Native

English

Advanced

Russian

Advanced

Education

Oct 2018 - Jun 2022

Freie Universität Berlin

M.Sc. · Economics · Berlin, Germany

Certifications & licenses

Microsoft Certified: Azure Data Engineer Associate

Microsoft Certified: Azure Fundamentals

Microsoft Certified: Fabric Data Engineer Associate

Microsoft Certified: Power BI Data Analyst Associate

Statistics

Experience

Total positions 3

Experience in Banking and Finance 1 y

Avg length 6 m

Longest experience 9 m

Global Experience

Countries worked in 1 (Germany)

Primary country Germany

Expertise

Recent roles Data Engineer, Analytics Engineer, Trainee Business Analytics

Main industries Banking and Finance, Media and Entertainment, Information Technology

Main business areas Information Technology, Business Intelligence, Strategy

Qualifications

Highest degree Master

Certifications earned 4

Profile

Created

July 2026

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Frequently asked questions

Have questions? Find more information here.

Where is Tobias based?

Tobias is based in Berlin, Germany and prefers 100% remote projects.

What languages does Tobias speak?

Tobias speaks the following languages: German (Native), English (Advanced), Russian (Advanced).

How many years of experience does Tobias have?

Tobias has at least 2 years of experience. During this time, Tobias has worked in at least 3 different roles and for 3 different companies. The average length of individual experience is 1 year and 6 months. Note that Tobias may not have shared all experience and actually has more experience.

What roles would Tobias be best suited for?

Based on recent experience, Tobias would be well-suited for roles such as: Data Engineer, Analytics Engineer, Trainee Business Analytics.

What is Tobias's latest experience?

Tobias's most recent position is Data Engineer at unitb consulting GmbH.

What companies has Tobias worked for in recent years?

In recent years, Tobias has worked for unitb consulting GmbH, mylantech GmbH, and DKB AG.

Which industries is Tobias most experienced in?

Tobias is most experienced in industries like Banking and Finance, Media and Entertainment, and Information Technology. Tobias also has some experience in Pharmaceutical.

Which business areas is Tobias most experienced in?

Tobias is most experienced in business areas like Information Technology, Business Intelligence, and Strategy.

What is Tobias's education?

Tobias holds a Master in Economics from Freie Universität Berlin.

Does Tobias have any certificates?

Tobias has 4 certificates. Among them, these include: Microsoft Certified: Azure Data Engineer Associate, Microsoft Certified: Azure Fundamentals, and Microsoft Certified: Fabric Data Engineer Associate.

What is the availability of Tobias?

Tobias is immediately available full-time for suitable projects.

What is the rate of Tobias?

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