Patrick Bartels-Senior Backend Developer
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Experience
Senior Backend Developer
stocubo GmbH
- Further development of the online shop
- Tech stack: Ruby on Rails, JavaScript, Postgres, AWS, Git, Continuous Deployment, Kubernetes, SLIM
Senior Backend Developer
vonfoorn GmbH
- Backend development
- System and software architecture
- Prototyping
- Project and team leadership
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
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
Senior Fullstack Developer
odacer finanzsoftware GmbH
- Development of new features for papierkram.de
- Tech stack: Ruby on Rails, HAML, SASS, Docker, Git
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
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
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
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
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
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
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
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
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
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
Industry experience
See where this freelancer has spent most of their professional time.
Experienced in Information Technology, Sport, Tourism, Government and Administration, Automotive, and Insurance.
Business area experience
See which departments and functions this freelancer has contributed to most.
Experienced in Information Technology, Product Development, and 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
Education
HAW Hamburg
B.Sc. in Applied Computer Science · Applied Computer Science · Hamburg, Germany
Statistics
Experience
Global experience
Expertise
Qualifications
Profile
Frequently asked questions
Have questions? Find more information here.
Patrick is based in Hamburg, Germany and can operate in on-site, hybrid, and remote work models.
Patrick speaks the following languages: German (Native), English (Advanced).
Patrick has at least 15 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. Note that Patrick may not have shared all experience and actually has more experience.
Based on recent experience, Patrick would be well-suited for roles such as: Senior Backend Developer, Senior Fullstack Developer, Senior Backend-Developer.
Patrick's most recent position is Senior Backend Developer at stocubo GmbH.
In recent years, Patrick has worked for stocubo GmbH, vonfoorn GmbH, Penseo GmbH, ucm.agency, and odacer finanzsoftware GmbH.
Patrick is most experienced in industries like Information Technology, Sport, and Tourism. Patrick also has some experience in Government and Administration, Automotive, and Insurance.
Patrick is most experienced in business areas like Information Technology, Product Development, and Project Management.
Patrick has recently worked in industries like Information Technology, Sport, and Retail.
Patrick has recently worked in business areas like Information Technology, Product Development, and Project Management.
Patrick holds a Bachelor in Applied Computer Science from HAW Hamburg.
The availability of Patrick needs to be confirmed.
Daily rate distribution
The rates shown represent the typical market range for freelancers in this position based on recent contracts on our platform.
Average rates for similar positions
Rates are based on recent contracts and do not include FRATCH margin.
The average daily rate is the mean of all daily rates from recent contracts of comparable freelancers on our platform.
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.
Calculated based on our freelancers’ daily rates as of 7 Sep 2026. Actual rates may vary depending on seniority level, experience, skill specialization, project complexity, and engagement length.
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