Carsten Rösner - Senior Development Manager

Q: Where is Carsten based?

Carsten is based in Winterberg, Germany .

Q: What languages does Carsten speak?

Carsten speaks the following languages: German (Native) .

Q: How many years of experience does Carsten have?

Carsten has at least 31 years of experience. During this time, Carsten has worked in at least 5 different roles and for 4 different companies . The average length of individual experience is 6 years and 3 months . Note that Carsten may not have shared all experience and actually has more experience.

Q: What is Carsten's latest experience?

Carsten's most recent position is Senior Development Manager at opta data IT GmbH .

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

In recent years, Carsten has worked for opta data IT GmbH .

Q: Which industries is Carsten most experienced in?

Carsten is most experienced in industries like Information Technology and Media and Entertainment .

Q: Which business areas is Carsten most experienced in?

Carsten is most experienced in business areas like Product Development , Human Resources , and Information Technology . Carsten also has some experience in Quality Assurance , Operations , and Procurement .

Q: Which industries has Carsten worked in recently?

Carsten has recently worked in industries like Information Technology .

Q: Which business areas has Carsten worked in recently?

Carsten has recently worked in business areas like Information Technology .

Recommended expert

Winterberg, Germany

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Experience

Jan 2021 - Present

5 years 8 months

Essen, Germany

Senior Development Manager

opta data IT GmbH

Coordination of group companies
Setup and development of a central SSO/portal
Department Head DevOps/Development

Oct 2018 - Dec 2020

2 years 3 months

Essen, Germany

Department Head IT / CTO (Development, QA, DevOps, Design)

opta data IT Solutions GmbH

Personnel and budget responsibility > €4M
8 teams, 82 employees, 3 locations

Jan 2000 - Oct 2018

18 years 10 months

Essen, Germany

Department Head Software Development

opta data hard- und software GmbH

Personnel and budget responsibility
Product management
Graphics/design

Aug 1997 - Jan 2000

2 years 6 months

Essen, Germany

Software Developer

opta data hard- und software GmbH

Development and extension of software modules
Bug fixes (COBOL)

Jul 1995 - Jul 1997

2 years 1 month

Munich, Germany

Cinema Manager

Kinowelt Medien AG

Purchasing, scheduling, and staff management for 8 cinemas
Managing 8 full-time employees, scheduling temporary staff

Industry Experience

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

Experienced in Information Technology and Media and Entertainment.

Information Technology

Media and Entertainment

Business Area Experience

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

Experienced in Product Development, Human Resources, Information Technology, Quality Assurance, Operations, and Procurement.

Product Development

Human Resources

Information Technology

Quality Assurance

Operations

Procurement

Skills

Professional And Strategic Project And Product Management
Agile Change Manager
Administrative And Technical Leadership
Agile Development Methodologies
Iso 9001, 27001, C5

Languages

German

Native

Education

Distance learning · Work and organizational psychology

Certifications & licenses

IHK

IT Specialist for Application Development (IHK)

IHK

Statistics

Experience

Total positions 5

Experience in Information Technology 29 y

Avg length 6 y 2 m

Longest experience 18 y 9 m

Global Experience

Countries worked in 1 (Germany)

Primary country Germany

Expertise

Recent roles Senior Development Manager, Department Head IT / CTO (Development, QA, DevOps, Design), Department Head Software Development

Main industries Information Technology, Media and Entertainment

Main business areas Product Development, Human Resources, Information Technology

Qualifications

Certifications earned 6

Profile

Created

February 2026

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Frequently asked questions

Have questions? Find more information here.

Carsten is based in Winterberg, Germany.

Carsten speaks the following languages: German (Native).

Carsten has at least 31 years of experience. During this time, Carsten has worked in at least 5 different roles and for 4 different companies. The average length of individual experience is 6 years and 3 months. Note that Carsten may not have shared all experience and actually has more experience.

Based on recent experience, Carsten would be well-suited for roles such as: Senior Development Manager, Department Head IT / CTO (Development, QA, DevOps, Design), Department Head Software Development.

Carsten's most recent position is Senior Development Manager at opta data IT GmbH.

In recent years, Carsten has worked for opta data IT GmbH.

Carsten is most experienced in industries like Information Technology and Media and Entertainment.

Carsten is most experienced in business areas like Product Development, Human Resources, and Information Technology. Carsten also has some experience in Quality Assurance, Operations, and Procurement.

Carsten has recently worked in industries like Information Technology.

Carsten has recently worked in business areas like Information Technology.

Carsten attended education in Work and organizational psychology.

Carsten has 6 certificates. Among them, these include: Certified Vocational Trainer (AEVO, IHK), IT Specialist for Application Development (IHK), and ISAQB/PSA Professional Software Architect.

Carsten is immediately available for suitable projects.

Carsten'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 Carsten, click the Meet button on the profile to request a meeting and discuss your project needs.

Daily Rate Distribution

0 2 4 6 8

<€960 €960-1120 €1280+

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. 897 €

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 880 €

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.