Backend Software Developer Automated Testing

Nextlane Madrid, Community of Madrid, Spain

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At Nextlane, we don't just develop software solutions - we create the future of the automotive industry.

We are a company that combines advanced technology with a clear vision: simplifying and digitizing every step of the automotive customer journey, empowering manufacturers and dealerships to thrive in a constantly evolving market.

We believe in the value of every team member, offering opportunities for you to develop and contribute to meaningful solutions.

So… What does it mean to be a #Nextlaner?

• Be part of a growth-oriented culture.
• Collaborate with colleagues from all over the world.
• Believe in the Power of ideas and the diversity of thought.
• Be committed to provide an environment where you can learn, grow, and collaborate on projects that make a global impact.

Our success is measured not just by results, but also by the growth and satisfaction of those who are part of our company.

At Nextlane, you'll have the opportunity to innovate, push boundaries, and work on solutions that are transforming the automotive world.

Context of the Position:

As a Backend Developer, you will play a critical role in designing, developing, and maintaining the backend systems of our applications. Your expertise in C#, . NET Core 7/8/9, and database technologies will ensure the creation of scalable, secure, and high-performance backend solutions. You will collaborate closely with front-end developers, DevOps engineers, and product teams to deliver robust APIs and services.

Additionally, you will enforce best coding practices, contribute to architectural decisions, and promote continuous improvement within the development team.

A strong emphasis is placed on automated testing. You must have hands-on experience with unit testing, integration testing, and end-to-end testing using tools such as Newman, Playwright, Cypress, Selenium or similar frameworks.

As a key member of the team, you will be responsible for:

• Develop, optimize, and maintain backend services using C# and . NET Core 9.
• Implement efficient data access layers using LINQ, Dapper, and Entity Framework.
• Design and maintain RESTful APIs ensuring security, scalability, and performance.
• Integrate authentication and authorization mechanisms using OpenID Connect.
• Work with MySQL and PostgreSQL databases, ensuring optimized queries and database integrity.

Code Quality and Best Practices

• Follow and enforce SOLID principles, clean architecture, and domain-driven design.
• Implement and refine the Mediator pattern to ensure maintainable and decoupled services.
• Design, implement, and maintain comprehensive test suites, including unit, integration, and E2E tests.
• Utilize tools such as Newman, Playwright, Cypress, or similar to ensure high test coverage and application reliability.
• Perform code reviews and provide constructive feedback to maintain high-quality standards.

Collaboration and Agile Development

• Work closely with front-end developers to design efficient APIs and improve system interactions.
• Participate in sprint planning, stand-ups, and retrospectives.
• Collaborate with product managers to translate business needs into technical requirements.
• Mentor and support junior developers in the team.

DevOps and Deployment

• Use Docker to containerize and deploy backend services efficiently.
• Work with CI/CD pipelines to automate build, test, and deployment processes.
• Monitor application performance, troubleshoot issues, and implement improvements.
• Ensure security best practices are followed in backend implementations.
• Stay up to date with the latest advancements in backend technologies and industry standards.
• Propose and implement improvements in system architecture and development workflows.
• Contribute to knowledge-sharing initiatives and technical documentation.

Languages: Fluent in English language. Interview will be conducted in English.

Experience:

• A minimum of 5 years of experience in backend development.
• Proven experience in developing and maintaining scalable backend services.
• Hands-on experience with LINQ, Dapper, and Entity Framework in production environments.
• Experience working with authentication and authorization systems such as OpenID Connect.
• Demonstrated experience in writing and maintaining unit, integration, and E2E tests.
• Familiarity with Agile methodologies and DevOps practices (desirable)

Technical Expertise

• Strong proficiency in C# and . NET Core 7/8 or 9. Experience with LINQ, Dapper, and Entity Framework.
• Solid understanding of SOLID principles, Clean Architecture, Test-Driven Development (TDD), and Domain-Driven Design (DDD)
• Proven experience with automated testing frameworks such as Newman, Playwright, Cypress, or similar.
• Knowledge of the Mediator pattern and its implementation is a plus. Expertise in developing RESTful APIs and integrating OpenID Connect authentication.
• Experience with MySQL and PostgreSQL database design and optimization.
• Proficiency in containerization using Docker.

Our Recruitment Process:

• 15-minute introductory call with our Talent Acquisition Specialist.
• 30 min - Teams meeting with our Hiring Manager to learn more about the project, the role.
• Last technical interview.

What We Offer:

We understand that flexibility and trust are essential for our teams. Here are some of the benefits we offer:

• Remote work: 3 days at home!
• Work-life balance: We have flexible entrance and depature time.
• Summer schedule on Fridays: Start early your weekends!
• Referral Bonus: €1500 for every talent you refer (after 6 months).
• Continuous Learning: Access to our internal platform for continuous development.
• Teambuilding: Our afterworks and activities are memorable!

At Nextlane, we are committed to creating a space where everyone feels valued and respected. We firmly believe that diversity in experiences and backgrounds strengthens our culture and drives innovation.

• Support for people with disabilities. If you need any adjustments during the recruitment process, let us know so we can provide the best possible experience.
• Equal opportunities for all: We welcome applications regardless of age, gender, origin, disability, or any other characteristic protected by law.

Join Nextlane and become part of the technological revolution in the automotive industry.

Discover why we are a great place to develop your talent!

• Seniority level.