Role Overview
Senior Backend Engineer with strong expertise in C#/. NET, cloud‐native backend development, and API engineering. A hands‐on engineering role focused on building scalable, secure, and maintainable backend services in cloud environments.ResponsibilitiesDesign, 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, integration, end‐to‐end, performance/load tests.Participate actively in code reviews and engineering quality ntribute to continuous improvement of development standards, tooling, and workflows.Work closely with Tech Leads, frontend engineers, QA engineers, and Dev Ops engineers to 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 ntainerize backend services using ntribute 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 ntribute to knowledge‐sharing initiatives and technical documentation.QualificationsMinimum 6 years of backend development experience.Experience developing and maintaining scalable backend services.Experience writing and maintaining unit, integration, and performance tests.Familiarity with Agile methodologies and Dev Ops practices.Hands‐on experience with Git Hub Copilot, Cursor, Claude‐Code, or similar AI coding assistants.Experience working in cloud environments such as Azure, AWS, or Google Cloud Platform (GCP).English speaking and writing proficiency.Strong communication skills, both verbal and written.Technical SkillsStrong 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, and Domain‐Driven Design (DDD).Experience with Docker and CI/CD workflows.Experience working with cloud platforms (AWS, Azure, or GCP).Understanding of scalable backend systems, observability, and reliability practices.AI EngineeringPractical experience using AI coding assistants in day‐to‐day software development (Cursor, Claude, Code, Codex, Git Hub Copilot).Experience configuring or working with AI‐assisted engineering workflows.Soft SkillsStrong analytical and problem‐solving abilities.Excellent communication and collaboration across cross‐functional teams.Ability to take ownership and drive initiatives to completion.Interpersonal SkillsAbility to collaborate in a diverse and dynamic environment.BenefitsHybrid work: rotational model, 2 days onsite, three days remote.Annual payments: 14 payments per year (12 monthly payments + 1 summer bonus + 1 Christmas bonus in November).Meal voucher: €10.20 per working day.Vacation: 23 vacation days, plus 24th or 31st December off.Language training: access to group classes in Spanish, English, or French.Private medical insurance: Multicare coverage.Team building: opportunities for afterworks and team activities.Diversity, Inclusion & Belonging
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: let us know if you need adjustments during the recruitment process.Equal opportunities for all: We welcome applications regardless of age, gender, origin, disability, or any other characteristic protected by law.