Join Capitole as a Senior .NET Software Engineer to design, develop, and architect scalable backend solutions using modern .NET technologies and cloud environments. This role requires 5+ years of experience in software development with a strong focus on design and architecture. Key requirements include a strong background in distributed systems and microservices, deep knowledge of relational databases, and experience working with AWS cloud environments.
Key Highlights
Key Responsibilities
Technical Skills Required
Benefits & Perks
Job Description
At Capitole we keep growing and we’re looking for a Senior .NET Software Engineer to join a high-impact project focused on scalable, distributed systems and cloud-native architecture 🚀
Do you want to live in Barcelona? This can be your opportunity!
You’ll play a key role in the design, architecture and development of robust backend solutions, working with modern .NET technologies and cloud environments.
If you enjoy solving complex technical challenges and influencing architectural decisions, this opportunity is for you.
🏡 Work model
- Hybrid role (2-3 times per week in Barcelona Office)
✨ What we offer
- €1200 annual training budget
- Flexible working hours & flexible compensation
- Private health insurance
- Sports discounts (AndJoy)
- Team buildings, tech communities & great work environment
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💻 What you’ll do
- Design and develop scalable applications using .NET technologies
- Architect and implement distributed systems and microservices
- Build and consume RESTful APIs (ASP.NET Core Web API)
- Design robust data access layers and optimize database performance
- Work with cloud services (AWS) and cloud-native architectures
- Ensure non-functional requirements: security, scalability & performance
- Participate in code reviews, technical decision-making & Agile ceremonies
- Troubleshoot complex production issues and provide scalable solutions
🛠 Tech stack
- .NET Core (6/7/8), C#, ASP.NET Core Web API, SQL Server (stored procedures, indexing, execution plans)
- NoSQL: MongoDB or AWS DynamoDB, CosmosDB...
- AWS Cloud (S3, ElastiCache/Redis), RabbitMQ, AWS SQS/SNS, Git
- Jenkins (CI/CD), Docker (fundamentals, environment variables, secrets management)
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🎯 What we’re looking for
- 5+ years of experience in software development with strong focus on design & architecture
- High English Level (B2+ - C1)
- Strong background in distributed systems & microservices
- Deep knowledge of relational databases and performance optimization
- Experience working with AWS cloud environments
- Strong debugging and problem-solving skills (memory leaks, thread starvation, slow queries, etc.)
- Ability to manage multiple priorities effectively
- Excellent communication & presentation skills
The employee will adhere to information security policies:
-Will have access to confidential information related to Capitole and the project they are working on.
-Must comply with the security policies and internal policies of the company and the client.
-Must sign an NDA.
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