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Job TitleSenior Back-End Developer
Companyappspace
Job LocationBarcelona, Spain Remote
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Last Seen 3 day(s) ago
DescriptionAbout Appspace: At Appspace we’re passionate about creating better work experiences for people everywhere and we’re looking for people that feel the same way. Our global office locations and flexible work culture help you work wherever and however you’re at your best. Plus we take the time to help you enjoy your work build lasting connections and grow your role. Join the Appspace team and be a part of a culture that’s helping people everywhere love where they work.Your Role as a Senior Back-End Developer: We’re looking for a seasoned Senior Back-End Developer who’s passionate about clean code scalable architecture and solving real-world problems with elegant technical solutions. In this role you’ll take full ownership of backend features—from technical design to delivery—while working closely with cross-functional teams to ensure what we build is reliable performant and maintainable. You'll help drive our backend strategy forward contribute to our engineering culture and continuously look for ways to improve how we build software. This role is perfect for someone who thrives in a collaborative fast-moving environment and enjoys diving deep into frameworks like .NET building secure and scalable APIs and working with a modern tech stack that includes relational and NoSQL databases containerization and cloud infrastructure. If you’re someone who values craftsmanship enjoys mentoring others and stays curious about new tools and practices we’d love to meet you. A day in the life of a Senior Back-End Developer: Own and drive product features from technical design to delivery collaborating closely with Product QA and other stakeholders. Tackle tech debt head-on—identify weak spots and propose real scalable solutions. Write clean testable and high-performance code that follows our internal standards and makes future-you proud. Contribute to milestones by ensuring every piece of code meets our Definition of Done (DoD). Share technical ideas and solutions in a way that’s easy for the whole team to understand and rally around. Stay curious—research and test new tools frameworks and strategies to keep our stack modern and efficient. What you’ll need: 5+ years of experience building and delivering enterprise-grade applications using an object-oriented language. Solid experience with .NET Framework and ASP.NET (we don’t count years here—just skill). Strong hands-on experience with MVC Web API frameworks (ASP.NET or similar) and RESTful APIs. Familiarity with ORM frameworks like Entity Framework NHibernate or similar. Proficiency in relational database design and SQL querying. Deep understanding of SOLID principles and how to apply them in real-world projects. Solid testing chops—unit integration API and performance testing are part of your flow. A strong communicator with great interpersonal skills—able to work with teams across geographies and disciplines. Focused on writing maintainable testable well-crafted code using design patterns and best practices. Passionate about clean code and craftsmanship (TDD BDD Calisthenics—we speak your language). Nice to Have’s: Experience with SharePoint and Office 365 development. DevOps experience and CI/CD mindset. Familiarity with OAuth OpenID and modern authentication protocols. Experience with GraphQL APIs. Knowledge of NoSQL databases (e.g. document-based or key-value stores). Exposure to Microservices or Modular Monolith architecture. Understanding of advanced architectural patterns (DDD Onion Hexagonal Ports & Adapters CQRS). Experience with cloud-native applications and Azure cloud services. Familiarity with event-driven systems (Kafka RabbitMQ etc.). Experience working with containerized applications (Docker). The Perks of Working for Appspace: For all our team members we offer a variety of benefits from competitive salaries employer paid medical dental and vision coverage and mental health resources. Additional perks include: Flexible work schedules Remote work opportunities A casual dress work environment  Reduced working hours in August  Appspace Quiet Fridays (No non-essential internal meetings scheduled) Gym allowance Training allowance Training days off  Disclaimer: Appspace is committed to equitable compensation practices and complies with all applicable local state and federal regulations. For jurisdictions that require pay scale disclosure a general compensation range may be provided during the initial stages of the interview process. Final compensation will be based on multiple factors including experience skills certifications and overall fit for the role. If you are located in a jurisdiction with specific pay transparency requirements we will be happy to discuss the relevant range during your application process.
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