Senior Backend Engineer - eCommerce & Retail (m/f/x)

As a Senior Backend Engineer at commercetools, your main responsibilities include designing and developing scalable payment systems, implementing in-store payment interactions, and collaborating closely with Product Management to translate business needs into technical solutions. You'll ensure that both functional and non-functional requirements such as performance and security are met while also contributing to the team roadmap.

To succeed in the Senior Backend Engineer role at commercetools, candidates must have over 5 years of experience in backend development, proficiency in Typescript or Javascript, and a deep understanding of asynchronous programming and REST API development. Familiarity with MongoDB and agile methodologies is beneficial, and fluency in English for international collaboration is required.

Yes, the Senior Backend Engineer position at commercetools allows for a hybrid work model, which means you'll spend three days a week in the London office, focusing on team bonding and project collaboration, while enjoying the flexibility of remote work for the rest of the week.

At commercetools, employee development is a priority. As a Senior Backend Engineer, you will have access to a learning and development budget, regular training sessions, and resources like Coursera and Babbel. This investment in your growth ensures you stay at the forefront of technology while working in a supportive environment.

Commercetools offers a comprehensive benefits package for Senior Backend Engineers, including a competitive salary, stock options, flexible work hours, workation opportunities, and access to learning resources. These benefits are designed to ensure employee satisfaction and work-life balance.

In answering this question, discuss specific projects where you designed or implemented scalable backend systems. Highlight the challenges you faced, the technologies you used, and the outcomes achieved. Providing data or metrics can greatly strengthen your response.

To respond effectively, mention specific measures you take for API security, such as authentication methods (OAuth, JWT), input validation, rate limiting, and implementing HTTPS. Give examples from your past work to demonstrate your understanding.

Explain your preferred debugging strategies, such as using logging frameworks, debugging tools, or unit tests. Discuss how you approach testing, including integration and functional tests, and how you ensure thorough coverage.

Use the STAR method to structure your response: describe the Situation, the Task at hand, the Actions you took, and the Results. Emphasize your problem-solving skills and creativity in overcoming the challenge.

Detail your knowledge of REST principles, HTTP methods, and resource-based architecture. Share any specific APIs you’ve built or contributed to, and highlight your understanding of responsive design and versioning.

Discuss methods like attending workshops, following industry blogs, participating in online courses, or contributing to open-source projects. Mention specific resources or communities that have been helpful in your learning process.

In your answer, discuss how performance can impact user experience and system efficiency. Provide examples of optimizations you’ve implemented, like caching strategies or database indexing, and their positive effects.

Elaborate on how thorough documentation helps maintain code quality and aids team collaboration. Mention tools you use for documentation, like Swagger for APIs, and your approach to keeping documentation updated.

Explain your strategy for task prioritization based on project impact, deadlines, and team input. Mention any tools you use for task management, like Jira or Trello, to track progress efficiently.

Here, describe any specific experience you have with payment processing systems, the challenges involved, and how you ensured reliability and security. Discuss any familiarity with relevant standards like PCI DSS, if applicable.