Patrick Bartels - Senior Backend Developer

Q: Where is Patrick based?

Patrick is based in Hamburg, Germany and can operate in on-site , hybrid , and remote work models.

Q: What languages does Patrick speak?

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

Q: How many years of experience does Patrick have?

Patrick has at least 14 years of experience. During this time, Patrick has worked in at least 7 different roles and for 15 different companies . The average length of individual experience is 1 year and 11 months . Note that Patrick may not have shared all experience and actually has more experience.

Q: What is Patrick's latest experience?

Patrick's most recent position is Senior Backend Developer at stocubo GmbH .

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

In recent years, Patrick has worked for stocubo GmbH , vonfoorn GmbH , Penseo GmbH , ucm.agency , and odacer finanzsoftware GmbH .

Q: Which industries is Patrick most experienced in?

Patrick is most experienced in industries like Information Technology (IT) , Sport and Recreation , and Tourism and Hospitality . Patrick also has some experience in Government and Public Administration , Automotive , and Insurance .

Q: Which business areas is Patrick most experienced in?

Patrick is most experienced in business areas like Information Technology (IT) , Product Development , and Project Management .

Q: Which industries has Patrick worked in recently?

Patrick has recently worked in industries like Information Technology (IT) , Sport and Recreation , and Retail .

Q: Which business areas has Patrick worked in recently?

Patrick has recently worked in business areas like Information Technology (IT) , Product Development , and Project Management .

Recommended expert

Hamburg, Germany

Experience

Aug 2024 - Apr 2025

9 months

Berlin, Germany

Senior Backend Developer

stocubo GmbH

Further development of the online shop
Tech stack: Ruby on Rails, JavaScript, Postgres, AWS, Git, Continuous Deployment, Kubernetes, SLIM

Jan 2023 - Present

3 years 2 months

Hamburg, Germany

Senior Backend Developer

vonfoorn GmbH

Backend development
System and software architecture
Prototyping
Project and team leadership

Sep 2022 - Jul 2024

1 year 11 months

Hamburg, Germany

Senior Backend Developer

Penseo GmbH

Further development of a portal for employee benefits
Tech stack: Ruby on Rails, JavaScript, VueJS, Vuex, Firebase, Postgres, AWS, Git, Jest, Cypress, Continuous Deployment

Apr 2022 - Sep 2022

6 months

Berlin, Germany

Senior Backend Developer

ucm.agency

Backend development of new features for the ucm app
Tech stack: Ruby on Rails, React Native, Continuous Deployment, AWS, Git

Oct 2021 - Mar 2022

6 months

Wiesbaden, Germany

Senior Fullstack Developer

odacer finanzsoftware GmbH

Development of new features for papierkram.de
Tech stack: Ruby on Rails, HAML, SASS, Docker, Git

Sep 2020 - Mar 2021

7 months

Heidelberg, Germany

Senior Backend-Developer

Getsafe Digital GmbH

Backend development of new features for the Getsafe app
Integration of price comparison portals from the UK market
IT environment: Ruby on Rails, HAML, SASS, Docker, Git, Continuous Deployment, Event Sourcing, Domain Driven, Redis

Oct 2019 - Apr 2020

7 months

Essen, Germany

Senior Backend-Developer

Innogy SE

Backend development of new features for the Getsafe app
Integration of price comparison portals from the UK market
IT environment: Ruby on Rails, HAML, SASS, Docker, Git, Continuous Deployment, Redis

Apr 2019 - Apr 2020

1 year 1 month

Düsseldorf, Germany

Lead Backend-Developer

Mintano UG

Backend development of new features for the Onebooth app
Further development of the web portal
IT environment: Ruby on Rails, HAML, SCSS, Git, Continuous Deployment, React Native, Redis

Sep 2016 - Apr 2017

8 months

Hamburg, Germany

Senior Backend-Developer

Wacku UG

Development of a social network based on Event Sourcing
IT environment: Ruby on Rails, HAML, Git, Continuous Deployment, AWS, Redis, Event Sourcing, Elasticsearch, Docker

Jun 2016 - Oct 2022

6 years 5 months

Cologne, Germany

Senior Backend-Developer

1 FC Köln GmbH & Co KGaA

Development of the backend for fc-spruchmaschine.de
IT environment: Ruby on Rails, HAML, SASS, Git, Continuous Deployment, Heroku, Redis

Oct 2015 - Dec 2022

7 years 3 months

Cologne, Germany

CTO and Fullstack Developer

heysite GmbH

Concept and development of the heysite.io website
Tech stack: Ruby on Rails, HAML, SASS, Git, Heroku, Redis, Elasticsearch, Docker, JavaScript

Jul 2015 - Oct 2019

4 years 4 months

Cologne, Germany

Fullstack Developer

Köln-Düsseldorfer Deutsche Rheinschiffahrt AG

Further development of a ticket shop we built ourselves
Tech stack: Ruby on Rails, HAML, SASS, Git, Heroku, Redis, JavaScript

May 2013 - Apr 2015

2 years

Munich, Germany

Backend Developer

BMW AG

Development of a sales platform for the newly introduced i models
Tech stack: Ruby on Rails, Git, AWS, Redis, Continuous Deployment

Jan 2013 - Jan 2013

1 month

Juba, SS

Fullstack Developer

IRC and UNHCR

Development of a platform to record refugees and connect to UN servers
Tech stack: Ruby on Rails, Git, Redis, HAML, SASS

Jan 2012 - Nov 2015

3 years 11 months

Mae Sot, Thailand

Backend Developer

Karen Human Rights Group

Concept and development of a platform to record and analyze reports
Tech stack: Ruby on Rails, Git, HAML, SCSS

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 (10.5 years), Sport (6.5 years), Tourism (4.5 years), Government and Administration (4 years), Automotive (2 years), and Insurance (1 year).

Information Technology

Sport

Tourism

Government and Administration

Automotive

Insurance

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 (14 years), Product Development (10.5 years), and Project Management (3 years).

Information Technology

Product Development

Project Management

Skills

Backend Development
System And Software Architecture
Prototyping
Project And Team Leadership
Industry Expertise: E-commerce, Platforms, Automotive, Insurance, Finance, Digitalization
Programming Languages: Ruby, Python, Java, Javascript/es6, Go, Elixir
Databases: Postgresql, Mysql/cloudsql, Firebase, Mongodb
Frameworks: Ruby On Rails, Vue, Angular, React, React Native, Django

Languages

German

Native

English

Advanced

Education

Oct 2007 - Sep 2010

HAW Hamburg

B.Sc. in Applied Computer Science · Applied Computer Science · Hamburg, Germany

Profile

Created

November 2023

Last Update

September 2025

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Frequently asked questions

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

Where is Patrick based?

Patrick is based in Hamburg, Germany and can operate in on-site, hybrid, and remote work models.

What languages does Patrick speak?

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

How many years of experience does Patrick have?

Patrick has at least 14 years of experience. During this time, Patrick has worked in at least 7 different roles and for 15 different companies. The average length of individual experience is 1 year and 11 months. Note that Patrick may not have shared all experience and actually has more experience.

What roles would Patrick be best suited for?

Based on recent experience, Patrick would be well-suited for roles such as: Senior Backend Developer, Senior Fullstack Developer, Senior Backend-Developer.

What is Patrick's latest experience?

Patrick's most recent position is Senior Backend Developer at stocubo GmbH.

What companies has Patrick worked for in recent years?

In recent years, Patrick has worked for stocubo GmbH, vonfoorn GmbH, Penseo GmbH, ucm.agency, and odacer finanzsoftware GmbH.

Which industries is Patrick most experienced in?

Patrick is most experienced in industries like Information Technology (IT), Sport and Recreation, and Tourism and Hospitality. Patrick also has some experience in Government and Public Administration, Automotive, and Insurance.

Which business areas is Patrick most experienced in?

Patrick is most experienced in business areas like Information Technology (IT), Product Development, and Project Management.

Which industries has Patrick worked in recently?

Patrick has recently worked in industries like Information Technology (IT), Sport and Recreation, and Retail.

Which business areas has Patrick worked in recently?

Patrick has recently worked in business areas like Information Technology (IT), Product Development, and Project Management.

What is Patrick's education?

Patrick holds a Bachelor in Applied Computer Science from HAW Hamburg.

What is the availability of Patrick?

Patrick is immediately available full-time for suitable projects.

What is the rate of Patrick?

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