Senior .NET Backend Engineer

About Us

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.

Work in 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.

Your Responsibilities

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

Backend Development
Design, develop, optimize, and maintain backend services using C# and .NET Core.
Build and maintain secure, scalable RESTful APIs (ASP.NET Core).
Work with relational databases, ensuring optimized queries and robust data integrity.
Configure and maintain rulesets and governance policies for autonomous AI development agents, ensuring safe and efficient operation across the delivery lifecycle.
Code Quality & Best Practices
Apply SOLID principles and design clean, maintainable software architectures (Hexagonal, Onion, Clean Architecture).
Design, implement, and maintain unit, integration, and performance/load tests.
Conduct code reviews and provide constructive technical feedback.
Apply DDD principles to model complex business domains.
Collaboration & Agile Development
Work closely with front‑end engineers to design efficient and scalable APIs.
Participate in agile ceremonies and contribute to team planning and delivery.
Collaborate with product managers to translate business needs into technical specifications.
Mentor and support junior engineers.
DevOps, Cloud & Architecture
Containerize backend services using Docker.
Work with CI/CD pipelines to automate build and deployment processes.
Monitor system health using logging, metrics, and tracing; drive performance and reliability improvements.
Ensure backend systems follow security best practices.
Contribute to the design and operation of highly available, scalable, distributed architectures.
Work within cloud environments such as Azure, AWS, or Google Cloud Platform (GCP).
Continuous Improvement
Stay updated with new backend technologies and emerging engineering practices.
Propose improvements to system architecture and development workflows.
Contribute to technical documentation and knowledge‑sharing initiatives.

What We're Looking For

Experience
Minimum 6 years of experience in backend development.
Proven experience building and maintaining scalable backend services.
Strong hands‑on experience with unit, integration, and load testing.
Familiarity with Agile methodologies and DevOps practices.
Experience with AI development tools (GitHub Copilot, Cursor, Claude‑Code), including configuration and rule management.
Experience working in cloud environments such as Azure, AWS, or GCP.
Languages
Fluent in English (mandatory).
French language proficiency is a plus.
(Interview will be conducted in English.)
Communication

Strong communication skills, both verbal and written.

Technical Skills
Strong proficiency in C# and .NET Core.
Knowledge and development of RESTful APIs.
Experience with relational databases.
Strong understanding of SOLID principles, design patterns, and modern architectures.
Proficiency with containerization (Docker or Kubernetes).
Experience with AI‑assisted development tools and AI agent configuration.
React and NoSQL database knowledge are a plus.
Interpersonal Skills
Ability to collaborate in a diverse and dynamic environment.
Strong analytical and problem‑solving abilities.
Ability to take ownership and drive initiatives to completion.

Our Recruitment Process

15‑minute introductory call with our Talent Acquisition Specialist.

Technical interview(s) focused on backend development and engineering fundamentals.

Architecture‑oriented discussion with a Senior/Lead Engineer or Engineering Manager.

Final cultural and alignment conversation.

What We Offer

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

Remote Work: Up to 3 days a week
Flexible working hours
Summer schedule on Fridays (start your weekend early!)
Referral Bonus: €1500 for every talent you refer (after 6 months)
Flexible Remuneration: COBEE platform
️ Private Medical Insurance: Adeslas
Continuous Learning: Access to our internal development platform
23 vacation days + intensive schedule in July and August
Teambuilding: Afterworks and memorable activities

Diversity, Inclusion & Belonging

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

We provide:

Support for people with disabilities — if you need adjustments during recruitment, we’ll ensure the best possible experience.
Equal opportunities for all — we welcome applications regardless of age, gender, origin, disability, or any characteristic protected by law.

Join Nextlane and become part of the technological transformation of the automotive industry.
Discover why we are a great place to grow your talent!