Denny Reeh - Lead Backend Developer for MySQL Systems

Q: Where is Denny based?

Denny is based in Augsburg, Germany and prefers 100% remote projects.

Q: What languages does Denny speak?

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

Q: How many years of experience does Denny have?

Denny has at least 28 years of experience. During this time, Denny has worked in at least 7 different roles and for 10 different companies . The average length of individual experience is 3 years and 10 months . Note that Denny may not have shared all experience and actually has more experience.

Q: What is Denny's latest experience?

Denny's most recent position is Lead Developer Backend at CHECK24 Vergleichsportal Mietwagen GmbH .

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

In recent years, Denny has worked for CHECK24 Vergleichsportal Mietwagen GmbH and Freelancer .

Q: Which industries is Denny most experienced in?

Denny is most experienced in industries like Information Technology , Tourism , and Education . Denny also has some experience in Automotive and Banking and Finance .

Q: Which business areas is Denny most experienced in?

Denny is most experienced in business areas like Information Technology , Product Development , and Quality Assurance .

Q: Which industries has Denny worked in recently?

Denny has recently worked in industries like Information Technology and Tourism .

Q: Which business areas has Denny worked in recently?

Denny has recently worked in business areas like Information Technology and Product Development .

Recommended expert

Augsburg, Germany

Check rate

Experience

May 2014 - Present

12 years 4 months

Augsburg, Germany

Lead Developer Backend

CHECK24 Vergleichsportal Mietwagen GmbH

Jan 2012 - Apr 2014

2 years 4 months

Technical Lead / Team Lead / Senior Software Developer

Jarlssen GmbH

Developer team lead
Software development
PHP
Symfony
Zend Framework
JavaScript
TÜV certified software quality
Rapid prototyping
PHP performance tuning
WebToPrint
LDAP
System administration
Payment integration
CRUD

Dec 2009 - Dec 2011

2 years 1 month

Munich, Germany

Senior Software Developer

Utopia AG

Dec 2008 - Aug 2009

9 months

Senior Software Developer

AUVICA GmbH

Aug 2007 - Nov 2008

1 year 4 months

Senior Software Developer / Tech Lead

LifeJack AG

Sep 2005 - Present

21 years

Software Developer

Freelancer

Software development
Server administration
PHP
JavaScript
PDFLib
MySQL
MySQL replication
Performance
Team organisation and team lead
Technical lead

May 2005 - Jul 2007

2 years 3 months

Software Developer

Sixt AG

Dec 2000 - Apr 2005

4 years 5 months

System Developer

e/t/s didactic media GmbH

May 2000 - Nov 2000

7 months

Diploma Student in IT Department

BMW Bank GmbH

Apr 1998 - Apr 2000

2 years 1 month

Software Developer

Baan Deutschland GmbH

Industry Experience

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

Experienced in Information Technology, Tourism, Education, Automotive, and Banking and Finance.

Information Technology

Tourism

Education

Automotive

Banking and Finance

Business Area Experience

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

Experienced in Information Technology, Product Development, and Quality Assurance.

Information Technology

Product Development

Quality Assurance

Skills

Mysql Query Optimization
Mysql Performance Analysis
Lead Developer Backend
Mysql High Availability Cluster
Php Oop (Symfony, Laminas, Zend)
Perl
Golang
Python
Cobol
Javascript
Node.Js
Dba
Mysql Innodb Cluster
Mysql Monitoring
Query Optimization
Performance Optimization Expert

Languages

German

Native

English

Advanced

Education

Oct 1995 - Jun 2000

Martin Luther University Halle-Wittenberg

Diploma in Business Informatics · Computer Software Engineering and Databases · Halle (Saale), Germany

Statistics

Experience

Total positions 10

Experience in Information Technology 23 y

Avg length 4 y 10 m

Longest experience 20 y 11 m

Global Experience

Countries worked in 1 (Germany)

Primary country Germany

Expertise

Recent roles Lead Developer Backend, Technical Lead / Team Lead / Senior Software Developer, Senior Software Developer

Main industries Information Technology, Tourism, Education

Main business areas Information Technology, Product Development, Quality Assurance

Qualifications

Highest degree Master

Profile

Created

June 2025

Last Update

June 2026

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Frequently asked questions

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Denny is based in Augsburg, Germany and prefers 100% remote projects.

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

Denny has at least 28 years of experience. During this time, Denny has worked in at least 7 different roles and for 10 different companies. The average length of individual experience is 3 years and 10 months. Note that Denny may not have shared all experience and actually has more experience.

Based on recent experience, Denny would be well-suited for roles such as: Lead Developer Backend, Technical Lead / Team Lead / Senior Software Developer, Senior Software Developer.

Denny's most recent position is Lead Developer Backend at CHECK24 Vergleichsportal Mietwagen GmbH.

In recent years, Denny has worked for CHECK24 Vergleichsportal Mietwagen GmbH and Freelancer.

Denny is most experienced in industries like Information Technology, Tourism, and Education. Denny also has some experience in Automotive and Banking and Finance.

Denny is most experienced in business areas like Information Technology, Product Development, and Quality Assurance.

Denny has recently worked in industries like Information Technology and Tourism.

Denny has recently worked in business areas like Information Technology and Product Development.

Denny holds a Master in Computer Software Engineering and Databases from Martin Luther University Halle-Wittenberg.

Denny is immediately available part-time for suitable projects.

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

To hire Denny, click the Meet button on the profile to request a meeting and discuss your project needs.

Daily Rate Distribution

0 1 2 3 4

<€320 €320-480 €640-800 €800-960 €960-1120 €1120+

The rates shown represent the typical market range for freelancers in this position based on recent contracts on our platform.

Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.

Average rates for similar positions

Rates are based on recent contracts and do not include FRATCH margin.

1000

750

500

250

Daily rate avg. 789 €

The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.

1000

750

500

250

Median rate 800 €

The median daily rate is the middle value of all daily rates — half of comparable freelancers charge less, half charge more. Unlike the average, it is barely affected by outliers.

Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.