Senior Software Engineer .NET, C# y REACT

At Hays, we are partnering with a leading multinational company in industrial automation and advanced technological solutions, specialized in the development of control systems, sensing technologies, and innovative solutions aimed at improving the efficiency, quality, and safety of production processes. The organization offers an international, innovative, and highly technical environment, where engineering teams work collaboratively across disciplines to deliver industry-focused solutions.

We are currently looking to hire a Senior Software Engineer (.NET, C# and React) to join a dynamic, multidisciplinary, and technically challenging environment.

What will your duties be?

• Transform requirements into software specifications.
• Translate software specifications into Features and User Stories.
• Design and implement the functionality for the requirements.
• Participate in code/design reviews and continuous improvement.
• Interact with stakeholders to improve the quality of the product.
• Provide influence on schedule, feature, and product designs.
• Identify bottlenecks and bugs, and devise solutions to mitigate and address these issues.
• Ensure the best possible performance, quality, and responsiveness of the software.
• Acquire and implement knowledge on new technology relevant for the company.
• Achieve the best products in the market with passion.

Which are the requirements?

• Bachelor’s or Master’s degree in Computer Science or a related field.
• 5+ years of experience as a Software Engineer, with strong ownership across the full software development lifecycle (from design to post-release), following best practices used in top-tier tech companies.
• Strong expertise in the Microsoft ecosystem: C#, .NET and React, and desktop application development.
• Solid understanding of software engineering fundamentals, including SOLID principles, clean architecture, and scalable system design.
• Proven experience applying design patterns, writing maintainable code, and performing high-quality code reviews and unit testing.
• Experience working in modern engineering environments using practices such as CI/CD, DevOps, and collaborative development workflows.
• Familiarity with cloud platforms (Azure or AWS) and distributed systems concepts.
• Experience or exposure to modern front-end technologies, especially React, and integration with backend services.
• Comfortable working with modern development tools and approaches (e.g., AI-assisted development / Copilots, “vibe coding” practices, rapid prototyping).
• Strong problem-solving skills, ownership mindset, and excellent written and verbal communication skills.
• The knowledge and/or experience of any of the following would be desirable:
• Industrial Automation knowledge (PLC, Motion Control, Inverter, Servo, etc.)
• Experience in web/mobile development.

What we offer?

• Permanent contract with Hays.
• Location: Barcelona.
• Work Model: Hybrid.
• Flexible Schedule.