**Can you imagine contributing to the development of applications that help bring global gaming experiences to life?** Join our expert team to work on engineering solutions that support the localization of games into more than sixteen languages. You will apply your knowledge of modern .NET development to build high performance backend components and web APIs that enable scalable workflows across international studios. At ERNI, you are never just a number. Even if you work on an external project, you will feel part of the team and always supported. **How do we make this happen?** With people. Besides your team and manager, you will have several support figures like a godparent, who will help you with the practical and administrative aspects of daily life during your first 6 months. And the second most important person after you, your mentor, who will guide you through your entire onboarding and career at ERNI. You will have regular 1:1 meetings with them, and recurrently, you will work on your development plan to define your short\-, medium\-, and long\-term goals. At ERNI, we highly value experience and technical knowledge. As a senior profile, you will have the space to continue growing, whether by deepining your technical skills or having greater influence on project decisions, with autonomy and the opportunity to share knowledge with other experts. And if you are interested in mentoring, there is also space for that, supporting other ERNIans while still focusing on the technical excellence that sets us apart. **What you will bring** * At least eight years of experience working on web application projects with Microsoft technologies. * Strong background in C Sharp development and relational databases with Entity Framework, Dapper or similar. * Experience with .NET Core 7, Git, GitLab and REST API design. * Knowledge of event based architectures and modern practices such as SOLID, TDD, BDD and clean code. * Experience writing unit tests with XUnit and Moq and working in SCRUM teams. **You will be responsible for** developing backend components and web API methods, translating user stories into new functionalities, implementing optimized queries and caching strategies, contributing to performance improvements, designing reliable and reusable code, collaborating closely with engineering teams, delivering high quality increments each sprint, and promoting best practices throughout the development lifecycle. **What if the project ends?** We work on a wide variety of projects, technologies, and sectors, allowing you to keep growing in different environments. If a project ends or you feel ready for a new challenge, we will find another one that aligns with your professional development. **Our working model ‍** We ask you to be available for key meetings. Need to leave for a doctor’s appointment or to pick up your child from school? No problem. We trust you to deliver quality work within your 40 hour workweek. This team works hybrid in Madrid or Barcelona, going to the office twice per week depending on project needs. **You will also enjoy:** We cover your certifications and reward technical achievements up to €1,400\. Private health and travel insurance. Full coverage for sick leave. ‍️ Free emotional, legal, and family support. ️‍️ Gym discounts plus sports compensation. Flexible remuneration: meals, transport, childcare, etc. Referral bonuses up to €6,000 per candidate and €5,000 per client. Twenty three working days of vacation. ️ Free language courses: English, Spanish, Catalan and German. **And the salary?** We will discuss it during the first call. If it is important to you, feel free to ask. **WOULD YOU LIKE TO BECOME AN ERNIan? APPLY NOW!**