Mid-Level Full Stack Web Developer (.NET)

October 18, 2026

Office

Middle

Barcelona, Catalonia, Spain

Keep in mind

Office-only work

Also worth knowing

English is required
Time tracker is used

Description

Leading Spanish supercomputing center hiring a mid-level full stack developer with .NET experience to maintain, improve and support an internal platform used for time tracking and reporting in audit processes. The role covers end-to-end feature development with .NET Core / .NET 6+ on the backend and Razor Views plus HTML on the frontend. The selected candidate will also integrate REST APIs, work with SQL databases and support the financial justification team regarding the platform.

Responsibilities

Develop end-to-end features using .NET Core / .NET 6+ on the backend and Razor Views plus HTML on the frontend
Participate in architecture design and technical decision-making
Contribute to code quality improvements, code reviews, and best practices
Integrate REST APIs and work with SQL databases
Provide support to the financial justification team regarding the platform

Requirements

Degree in Computer Engineering, Information Technology, or similar
2-4 years of experience with C# and .NET 6+
Experience with Entity Framework and SQL Server
Experience working with Razor Views
Strong knowledge of HTML, CSS, JavaScript, jQuery
Experience with web deployment using Kestrel and HTTPS, and SMTP and authentication setup
Working fluency in Spanish and English is required, Catalan will be a plus
Understanding of REST APIs
Knowledge of ASP.NET Identity is nice to have
Quartz.NET for scheduled jobs is nice to have
QuestPDF or similar PDF generation libraries is nice to have
EPPlus for Excel and CSV exports is nice to have
Serilog and automated email sending via SMTP are nice to have

Conditions

Full-time contract of 35 hours per week with flexible working hours
Open-ended contract linked to the project and budget duration
Position located at BSC within the Management Department
Extensive training plan and highly stimulating environment with state-of-the-art infrastructure
Restaurant tickets and private health insurance
Support to the relocation procedures
22 days of holidays plus 6 personal days plus December 24 and 31
Competitive salary commensurate with qualifications, experience and the cost of living in Barcelona