Apply

Ready to go for it?

AI Apply speeds things up—apply directly if you prefer.

FREE ACCESS
5,000–10,000 jobs/day
JobTailor Logo

See all jobs on JobTailor

Search thousands of fresh jobs every day.

Discover
  • Fresh listings
  • Fast filters
  • No subscription required
Create a free account and start exploring right away.
Nextlane

Senior Backend Engineer, .NET, Cloud, APIs

Nextlane

Senior Backend Engineer at Nextlane focused on cloud-native backend development and API engineering. Work on scalable solutions that transform the automotive industry.

Posted 6/2/2026full-timeMadrid • 🇪🇸 SpainSeniorWebsite

Tech Stack

Tools & technologies
AWSAzureCloudDockerGoogle Cloud Platform.NETSQL

About the role

Key responsibilities & impact
  • Design, develop, and maintain backend services using C# and .NET Core.
  • Build secure, scalable, and high-performance REST APIs.
  • Implement backend solutions aligned with approved architectural patterns and technical guidelines.
  • Develop services capable of handling high concurrency and production-scale workloads.
  • Write optimized and maintainable database queries while ensuring data integrity and performance.
  • Troubleshoot and resolve backend and production issues efficiently.
  • Write clean, maintainable, testable, and production-ready code.
  • Apply SOLID principles and safeguard architectural practices such as Clean Architecture, Onion Architecture, Hexagonal Architecture, and Domain-Driven Design (DDD).
  • Implement and maintain unit tests, integration tests, end-to-end tests, and performance/load tests.
  • Participate actively in code reviews and engineering quality initiatives.
  • Contribute to continuous improvement of development standards, tooling, and workflows.
  • Work closely with Tech Leads, frontend engineers, QA engineers, and DevOps engineers.
  • Translate technical and business requirements into high-quality implementations.
  • Support architecture compliance and contribute to solution improvement discussions.
  • Provide technical guidance and support to less experienced engineers when needed.
  • Participate actively in Agile ceremonies and team collaboration activities.
  • Work with cloud platforms such as AWS, Azure, or GCP.
  • Containerize backend services using Docker.
  • Contribute to CI/CD pipelines and automated deployment processes.
  • Support observability and monitoring practices using logging, metrics, and tracing tools.
  • Follow security, reliability, and operational best practices in backend implementations.
  • Stay up to date with advancements in backend technologies.
  • Propose and implement improvements in system architecture and development workflows.
  • Contribute to knowledge-sharing initiatives and technical documentation.

Requirements

What you’ll need
  • A minimum of 6 years of experience in backend development.
  • Experience in developing and maintaining scalable backend services.
  • Experience writing and maintaining unit, integration and performance tests.
  • Familiarity with Agile methodologies and DevOps practices.
  • Hands-on experience with GitHub Copilot, Cursor, Claude-Code … configuration, rule management and use.
  • Experience working in cloud environments such as Azure, AWS, or Google Cloud Platform (GCP).
  • Strong proficiency in C# and .NET Core.
  • Strong experience designing and implementing REST APIs.
  • Strong SQL and relational database experience.
  • Good understanding of: SOLID principles, Design patterns, Clean Architecture, Domain-Driven Design (DDD).
  • Experience with Docker and CI/CD workflows.
  • Practical experience using AI coding assistants in day-to-day software development (Cursor/Claude Code/Codex/Github Co-pilot).
  • Fluent in English (mandatory). French language proficiency is a plus.

Benefits

Comp & perks
  • Remote Work: Up to 3 days a week!
  • Work-life balance: We have flexible entrance and departure time.
  • Summer schedule on Fridays: Start early your weekends!
  • 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 platform for continuous development.
  • Vacation: 23 vacation days plus an intensive schedule in July and August.
  • Teambuilding: Our afterworks and activities are memorable!

ATS Keywords

✓ Tailor your resume
Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools
C#.NET CoreREST APIsSQLDockerCI/CDunit testingintegration testingperformance testingDomain-Driven Design
Soft Skills
communicationcollaborationproblem-solvingtechnical guidancecontinuous improvementcode reviewAgile methodologiesteamworkmentorshipadaptability