Senior Backend EngineerWe are looking for a Senior Backend Engineer with strong expertise in C#/. NET, cloud‑native backend development, and API engineering. This is a hands‑on role focused on building scalable, secure, and maintainable backend services in cloud environments. The engineer will work closely with Tech Leads and cross‑functional teams to implement high‑quality solutions aligned with established architectural and engineering standards. This role is not a Tech Lead or Architect position. The expectation is strong technical execution, active contribution to engineering quality, support for architecture compliance, and ownership of backend deliverables.AI‑assisted development practices are a core expectation for this role. Candidates should be comfortable using tools such as Cursor, Claude Code Codex, or similar within their daily engineering workflow.Your ResponsibilitiesBackend DevelopmentDesign, 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 de Quality and Best PracticesWrite 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 testsIntegration testsEnd‑to‑end testsPerformance/load testsParticipate actively in code reviews and engineering quality ntribute to continuous improvement of development standards, tooling, and llaboration and Agile DevelopmentWork closely with Tech Leads, frontend engineers, QA engineers,



and Dev Ops 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.Dev Ops, Cloud and ArchitectureWork 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 ntinuous ImprovementStay 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.What We're Looking ForExperienceA 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 Dev Ops practices.Hands‑on experience with Git Hub Copilot, Cursor, Claude‑Code … configuration, rule management and use.Experience working in cloud environments such as Azure, AWS, or Google Cloud Platform (GCP).Languages & CommunicationEnglish (Interview will be conducted in English).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 principlesDesign patternsClean ArchitectureDomain‑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 Engineering.Practical experience using AI coding assistants in day‑to‑day software development (Cursor/Claude Code/Codex/Github Co‑pilot).Experience configuring or working with AI‑assisted engineering workflows.Language SkillsFluent in English (mandatory).French language proficiency is a plus.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 Skills: Ability to collaborate in a diverse and dynamic environment.What We OfferWe understand that flexibility and trust are essential for our teams.Remote Work: Up to 3 days a week!Work‑life balance: We have versátil 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: ntinuous 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!Diversity, Inclusion & BelongingSupport 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.

📌 Senior Backend Engineer (.Net, Cloud & Apis) (Vigo)
🏢 Nextlane
📍 Vigo