knowmad mood is a leading Spanish technology consulting firm specializing in digital transformation, software development, and IT strategy. With a workforce of over 2,500 professionals, the company provides high-impact services across various sectors including banking, insurance, and retail, helping organizations navigate complex technological shifts through innovation and agile methodologies.

Headquartered in Madrid, the company maintains a significant presence across Spain with multiple regional hubs and a strong culture of remote work. For international professionals, knowmad mood is an attractive employer due to its involvement in large-scale international projects, frequent requirements for English-speaking talent, and a flexible "work from anywhere" policy for many of its technical roles.

Founded in 1994 as atSistemas, the company rebranded to knowmad mood in 2023 to reflect its international expansion and digital transformation focus. It is currently listed on the BME Growth market and continues to grow through both organic development and strategic acquisitions.

For international professionals

Offers a high volume of 100% remote roles, allowing employees to live anywhere in Spain.
Many positions specifically require high English proficiency (C1 level), making it accessible for international talent.
Publicly traded on the BME Growth market, indicating financial stability and corporate transparency.
Operates multiple physical offices in major Spanish cities including Madrid, Barcelona, and Palma de Mallorca for those preferring hybrid work.
Actively hires for modern tech stacks including AI, Cloud (AWS/Azure), and DevOps.

Senior .NET Developer (C#, ASP.NET Core, APIs)

knowmad mood

This job was originally posted in Spanish and automatically translated to English. You'll most likely need Spanish to apply.

Job Description

We are knowmad mood!

We are a leading digital transformation company, constantly evolving and at the forefront of technology. We were born to provoke real change through innovation and sustainable development, with the mission of adding value to clients and boosting our talent.

Made up of more than 3,000 creative, digital, and innovative people connected to a purpose and capable of generating connections with people all over the world. A responsible, flexible team with a high capacity to adapt to the needs of our clients and the market, while providing value, vision, creativity, expertise, professionalism, and a passion for technology in every project.

The values that mark our course and guide us toward excellence are collaboration, innovation, commitment, fun, and trust.

What do we value?

At least 5 years of experience as a Senior .NET Developer in:

• Development with .NET Core and Microsoft .NET Framework, with advanced mastery of C#.
• Experience in web development using ASP.NET MVC and/or ASP.NET Core.
• Experience in the development and integration of RESTful APIs and Web Services (.NET Web Services, WCF).
• Solid knowledge of relational databases, especially SQL Server.
• Experience with version control systems such as Git.
• Knowledge of front-end technologies (HTML, CSS, JavaScript).
• Experience in agile development environments.
• Analytical skills, problem-solving, and effective communication.
• Experience with containerization technologies such as Docker and Kubernetes.

We would especially love it if you have worked on international projects and have experience in technically demanding environments.

What would your functions be?

• Backend Development in .NET: Design, develop, and maintain robust applications using .NET Core, C#, and the Microsoft ecosystem, ensuring code quality and scalability.

• API and Service Development: Implement and integrate RESTful APIs and web services (WCF, .NET Web Services), guaranteeing interoperability between systems.

• Database Management: Design and optimize queries and structures in SQL Server, ensuring data performance and integrity.

• Architecture and Best Practices: Participate in technical decisions, applying modern architecture principles, design patterns, and development best practices.

• Collaboration in agile teams: Actively participate in agile ceremonies, collaborate with multidisciplinary teams, and contribute to the continuous improvement of development.

• Integration of modern solutions: Work with containers (Docker, Kubernetes) and contribute to the modernization of the technological architecture.

Additionally, we will highly value if you have experience and/or knowledge in:

• Messaging technologies such as RabbitMQ or equivalents.
• Search and analysis tools such as ElasticSearch.
• NoSQL databases such as MongoDB and caching systems such as Redis.
• Knowledge of Azure and cloud architectures.
• Experience in international projects.
• B2 level of English (regular use in dailies and communication with international teams).

And with us, you can enjoy:

✅ Permanent Contract

✅ 100% REMOTE

✅ Internal training and access to certifications ♻ Check our calendar here:

https://www.knowmadmood.com/es/talento/formacion

✅ Flexible remuneration plan (health insurance, transport, childcare vouchers, restaurant vouchers)

✅ Brand Ambassador, through our referral plan

Recommend your friends and get an extra!

✅ Events, meetups, techdays, talks... and much more!

✅ 26 days of rest (22 vacation days, 2 personal days, and December 24th and 31st as default holidays)

✅ Schedule: 8:30 to 18:00 (flexible) Mon-Thu and Fri 8:00 to 15:00, and Summer Intensive in July and August from 8:00 to 15:00

To stay up to date with our news, follow us here -> knowmad mood

At knowmad mood> we are committed to equal opportunity and respect for diversity. We apply our Equality Plan and the principle of non-discrimination in all our selection processes.

View original advert (Spanish)

We are knowmad mood!

Somos una compañía líder en transformación digital, en constante evolución y a la vanguardia de la tecnología. Nacimos para provocar un cambio real a través de la innovación y el desarrollo sostenible, con la misión de aportar valor a los clientes e impulsar nuestro talento.

Formado por más de 3.000 personas creativas, digitales e innovadoras conectadas a un propósito y capaces de generar conexiones con personas de todo el mundo. Un equipo responsable, flexible y con alta capacidad de adaptación a las necesidades de nuestros clientes y del mercado, a la vez que proporciona valor, visión, creatividad, expertise, profesionalidad y pasión por la tecnología en cada proyecto.

Los valores que marcan nuestro rumbo y nos guían hacia la excelencia son la colaboración, la innovación, el compromiso, la diversión y la conﬁanza.

¿Qué es lo que valoramos?

Experiencia de al menos 5 años como Desarrollador/a Senior .NET en:

• Desarrollo con .NET Core y Microsoft .NET Framework, con dominio avanzado de C#.
• Experiencia en desarrollo web utilizando ASP.NET MVC y/o ASP.NET Core.
• Experiencia en desarrollo e integración de APIs RESTful y Web Services (.NET Web Services, WCF).
• Conocimientos sólidos en bases de datos relacionales, especialmente SQL Server.
• Experiencia con sistemas de control de versiones como Git.
• Conocimiento de tecnologías front-end (HTML, CSS, JavaScript).
• Experiencia en entornos ágiles de desarrollo.
• Capacidades analíticas, resolución de problemas y comunicación efectiva.
• Experiencia con tecnologías de contenedorización como Docker y Kubernetes.

Nos encantaría especialmente si has trabajado en proyectos internacionales y tienes experiencia en entornos altamente exigentes técnicamente.

¿Cuáles serían tus funciones?

• Desarrollo Backend en .NET: Diseñar, desarrollar y mantener aplicaciones robustas utilizando .NET Core, C# y el ecosistema Microsoft, asegurando la calidad y escalabilidad del código.

• Desarrollo de APIs y Servicios: Implementar e integrar APIs RESTful y servicios web (WCF, .NET Web Services), garantizando la interoperabilidad entre sistemas.

• Gestión de Bases de Datos: Diseñar y optimizar consultas y estructuras en SQL Server, asegurando el rendimiento y la integridad de los datos.

• Arquitectura y Buenas Prácticas: Participar en decisiones técnicas, aplicando principios de arquitectura moderna, patrones de diseño y buenas prácticas de desarrollo.

• Colaboración en equipos ágiles: Participar activamente en ceremonias ágiles, colaborar con equipos multidisciplinares y contribuir a la mejora continua del desarrollo.

• Integración de soluciones modernas: Trabajar con contenedores (Docker, Kubernetes) y contribuir a la modernización de la arquitectura tecnológica.

Además, valoraremos muy positivamente si tienes experiencia y/o conocimientos en:

• Tecnologías de mensajería como RabbitMQ o equivalentes.
• Herramientas de búsqueda y análisis como ElasticSearch.
• Bases de datos NoSQL como MongoDB y sistemas de caché como Redis.
• Conocimientos en Azure y arquitecturas cloud.
• Experiencia en proyectos internacionales.
• Nivel de inglés B2 (uso habitual en dailys y comunicación con equipos internacionales).

Y con nosotros podrás disfrutar de:

✅Contrato Indefinido

✅ 100% REMOTO

✅Formación interna y acceso a certificaciones ♻Consulta nuestro calendario aquí:

https://www.knowmadmood.com/es/talento/formacion

✅Plan de retribución flexible (seguro médico, transporte, tickets guardería, tickets restaurante)

✅Embajador de nuestra marca, a través de nuestro plan amigo

¡Recomienda a tus amigos y llévate un extra!

✅¡Eventos, meetups, techdays, charlas...y mucho más!

✅ 26 días de descanso (22 días vacaciones, 2 días de libre disposición y 24 y 31 diciembre festivos por defecto)

✅ Horario: 8.30 a 18h ( flexible) L-J y V 8 a 15h e Intensiva de Verano Julio y Agosto de 8 a 15h

Para estar al corriente de nuestras novedades síguenos aquí -> knowmad mood

En knowmad mood nos comprometemos con la igualdad de oportunidades y el respeto a la diversidad. Aplicamos nuestro Plan de Igualdad y el principio de no discriminación en todos nuestros procesos de selección.