Aktuelle Jobs im Zusammenhang mit Senior Backend Developer - Köln, Nordrhein-Westfalen - Cofinity-X GmbH


  • Köln, Nordrhein-Westfalen, Deutschland ista SE Vollzeit

    Senior Backend Engineer (m/f/d) At ista, we support property owners and managers in making their buildings fit for the future and kind to the planet. Our goal is to track and bill energy consumption in a way that's easy to grasp, helping to save energy and reduce CO2 emissions. We're looking for a skilled Senior Backend Engineer to join our team and...


  • Köln, Nordrhein-Westfalen, Deutschland European Medical Consulting Adam GmbH Vollzeit

    About the JobWe are seeking a skilled Senior Software Developer to join our team in developing and maintaining our Backend Systems.The ideal candidate will have experience in software engineering and a strong understanding of backend systems.Key ResponsibilitiesDevelop and maintain backend systems using relevant programming languages and...


  • Köln, Nordrhein-Westfalen, Deutschland Siegwerk Ventures GmbH Vollzeit

    About the RoleWe are seeking a highly skilled Senior Backend Developer to join our engineering team at Siegwerk Ventures GmbH. As a key member of our team, you will be responsible for designing and developing professional web applications in our online store and operation service.Key ResponsibilitiesDesign and develop a reliable and stable data platform and...


  • Köln, Nordrhein-Westfalen, Deutschland Redcare Pharmacy Vollzeit

    Senior Backend Engineer - JavaAbout Redcare Pharmacy:We are a leading e-pharmacy company in Europe, driven by innovation and a passion for delivering exceptional healthcare services. Our team is dedicated to creating a collaborative and inspiring work environment where every employee feels valued and motivated to contribute to our mission of making...


  • Köln, Nordrhein-Westfalen, Deutschland Redcare Pharmacy Vollzeit

    Senior Backend Engineer - JavaAbout Redcare Pharmacy:We are a leading e-pharmacy company in Europe, driven by innovation and a passion for delivering exceptional healthcare services. Our team is dedicated to creating a collaborative and inspiring work environment where every employee feels valued and motivated to contribute to our mission of making...


  • Köln, Nordrhein-Westfalen, Deutschland Kaufland e-commerce Vollzeit

    Employment DetailsWe are seeking a skilled Senior Backend Developer to join our team at Kaufland e-commerce. As a key member of our development team, you will be responsible for designing and implementing scalable and robust backend solutions for our Kaufland Marketplaces and internal services.Key Responsibilities:Design and implement scalable and robust...


  • Köln, Nordrhein-Westfalen, Deutschland Siegwerk Ventures GmbH Vollzeit

    About the RoleWe are seeking a highly skilled Senior Backend Developer to join our engineering team at Siegwerk Ventures GmbH. As a key member of our team, you will be responsible for designing and implementing professional web applications in our online store and operation service.Key ResponsibilitiesDevelop a reliable and stable data platform and...


  • Köln, Nordrhein-Westfalen, Deutschland konfetti GmbH Vollzeit

    About konfetti GmbHWe are a leading booking platform and software for local workshops, founded in 2021. Our team of 30 people is based in Berlin and Cologne, and we are looking for exceptional individuals to join us.Your MissionWe are seeking a talented Senior Backend Developer to join our team. As a key member of our development team, you will be...

  • Software Engineer

    vor 2 Wochen


    Köln, Nordrhein-Westfalen, Deutschland nerou GmbH Vollzeit

    About the Role: As a Senior Backend Developer, you will be responsible for designing, developing, and maintaining scalable and efficient software systems. Your primary focus will be on building robust backend infrastructure, ensuring seamless integration with frontend components, and collaborating with cross-functional teams to drive business growth.


  • Köln, Nordrhein-Westfalen, Deutschland Redcare Pharmacy Vollzeit

    About the RoleWe are seeking a highly skilled Senior Backend Engineer to join our team at Redcare Pharmacy. As a key member of our Prices and Offers Product team, you will play a vital role in developing new features and maintaining our micro-services that serve millions of customers.Key ResponsibilitiesDesign and implement new backend services across...


  • Köln, Nordrhein-Westfalen, Deutschland Redcare Pharmacy Vollzeit

    About the RoleWe are seeking a highly skilled Senior Backend Engineer to join our team at Redcare Pharmacy. As a key member of our Prices and Offers Product team, you will play a vital role in developing new features and maintaining our micro-services that serve millions of customers.Key ResponsibilitiesDesign and implement new backend services across...


  • Köln, Nordrhein-Westfalen, Deutschland Cofinity-X GmbH Vollzeit

    About the RoleCofinity-X GmbH is seeking a skilled Senior Backend Developer to join our team in Cologne. As a key member of our development team, you will be responsible for designing, developing, and maintaining high-performance and secure REST APIs.Key ResponsibilitiesDesign and develop scalable and efficient REST APIs using .NET and Entity...


  • Köln, Nordrhein-Westfalen, Deutschland Kaufland e-commerce Vollzeit

    Employment DetailsWe are seeking a skilled Senior PHP Backend Developer to join our dynamic team at Kaufland e-commerce. As a key member of our development team, you will be responsible for designing and implementing scalable and robust backend solutions for our Kaufland Marketplaces and internal services.Your ResponsibilitiesDevelop high-quality,...


  • Köln, Nordrhein-Westfalen, Deutschland Redcare Pharmacy Vollzeit

    About this role:We are seeking a skilled Senior Backend Engineer to join our Prices and Offers Product team. As a key member of our team, you will play an active role in developing new features, supporting the team in maintaining micro-services, and extending backend services across various domains.Key Responsibilities:Develop new features for our Prices and...


  • Köln, Nordrhein-Westfalen, Deutschland konfetti GmbH Vollzeit

    About konfetti GmbHWe are a fast-growing start-up, founded in 2021, with a team of 30 people in Berlin and Cologne. We are developing Europe's leading booking SaaS and a marketplace for local courses and workshops.Job DescriptionWe are looking for a talented Backend Developer to join our team. As a key member of our development team, you will be responsible...


  • Köln, Nordrhein-Westfalen, Deutschland konfetti GmbH Vollzeit

    About konfetti GmbHWe are a fast-growing start-up, founded in 2021, with a team of 30 people in Berlin and Cologne. We are developing Europe's leading booking SaaS and a marketplace for local courses and workshops.Job DescriptionWe are looking for a talented Backend Developer to join our team. As a key member of our development team, you will be responsible...

  • Software Engineer

    vor 2 Wochen


    Köln, Nordrhein-Westfalen, Deutschland Neukirchener Erziehungsverein Vollzeit

    About the JobWe are seeking a skilled Senior Backend Developer to join our team at {company}. As a key member of our tech team, you will be responsible for designing, developing, and maintaining our company's backend infrastructure.ResponsibilitiesDesign and develop scalable, efficient, and secure backend services using Java and related...


  • Köln, Nordrhein-Westfalen, Deutschland konfetti GmbH Vollzeit

    About konfetti GmbHWe are a leading booking platform and software for local workshops, founded in 2021. Our team of 30 people is based in Berlin and Cologne, and we are continuously developing our product to offer over 7,000 courses in Germany, Austria, and online.Your MissionWe are looking for a skilled Backend Developer to join our team and contribute to...


  • Köln, Nordrhein-Westfalen, Deutschland Siegwerk Ventures GmbH Vollzeit

    {"h3": "Join Our Engineering Team", "p": "At Siegwerk Ventures GmbH, we are making the packaging industry more digital and sustainable. As a Senior Backend Developer, you will work in our cross-functional team on the development of professional web applications in our online store and our operation service. Our team is passionate about building a reliable...


  • Köln, Nordrhein-Westfalen, Deutschland Siegwerk Ventures GmbH Vollzeit

    {"h3": "Join Our Engineering Team", "p": "At Siegwerk Ventures GmbH, we are making the packaging industry more digital and sustainable. As a Senior Backend Developer, you will work in our cross-functional team on the development of professional web applications in our online store and our operation service. Our team is passionate about building a reliable...

Senior Backend Developer

vor 2 Monaten


Köln, Nordrhein-Westfalen, Deutschland Cofinity-X GmbH Vollzeit
About the Role

Cofinity-X GmbH is seeking a skilled Net Developer to join our team in Cologne. As a key member of our development team, you will be responsible for designing, developing, and maintaining high-performance and secure REST APIs.

Key Responsibilities
  • Design and implement efficient data access and manipulation using Entity Framework
  • Implement encryption and security principles to protect sensitive data
  • Contribute to the overall architecture for scalability and maintainability
  • Solve complex implementation issues creatively and analytically
  • Develop unit tests and ensure an efficient end-to-end development process
Requirements
  • Bachelor's degree in computer science, Information Technology, or related field and experience in backend development
  • Deep knowledge of.NET, Entity Framework, database migration, RESTful API construction, and encryption
  • Proficient with Visual Studio Unit Testing Framework, NUnit, MSTest, and API development/testing tools like Postman
  • Understanding of security by design principles
  • Ability to contribute to system architecture and identify improvements
  • Strong problem-solving skills focused on robust and innovative solutions
  • Demonstrated ability to take ownership of tasks and develop high-quality solutions
What We Offer
  • Hybrid working model
  • Balanced work-life balance with flexible working hours
  • Annual training budget for continuous professional and personal development
  • Free choice of hardware, including private use
  • Monthly lunch subsidy
  • Deutschland Ticket to Job Bike for environmentally friendly mobility options
  • Workation to work remotely from different locations within the EU
  • Pensions scheme with company sponsorship
  • Regular team events to strengthen cohesion and foster a positive working atmosphere