Back-end .NET Developer

SD Worx; Málaga; On-site; EUR 60,000 - 90,000; Full time

Benefits offered by this job

Private medical insurance

25 vacation days

Workation

Laptop provided

Flexible schedule

Career growth

Learning opportunities

Job summary

SD Worx is seeking a Senior Back-end .NET Developer to join the Corporate Data Management (CDM) team within Data & AI. You will design, develop, and maintain back-end solutions enabling data integration across enterprise systems and supporting Master Data Management initiatives.

The role requires hands-on .NET expertise, proactive collaboration with technical and business stakeholders, and a focus on scalable, high-quality software.

Qualifications

• Minimum 5 years of hands-on experience in back-end development with .NET Framework/.NET Core and C#.
• Experience building and consuming REST and SOAP services.
• Solid knowledge of SQL Server and database design best practices.
• Experience writing unit and integration tests.
• Ability to translate business requirements into scalable technical solutions.

Responsibilities

• Design, develop, and maintain back-end applications using .NET Framework, .NET Core and C#.
• Develop and support integrations between corporate systems and data platforms.
• Contribute to Master Data Management (MDM 2.0) initiatives and related projects.
• Deliver high-quality software within timelines and standards.
• Perform root cause analysis and fix defects; drive resolution.
• Write, maintain, and execute unit and integration tests; participate in code reviews.
• Collaborate with Product Owners and cross-functional teams to translate requirements into technical solutions.
• Ensure solutions are scalable, maintainable, and aligned with architectural guidelines.
• Support CI/CD processes and deployment activities.
• Create and maintain technical documentation and development standards.
• Take ownership of development activities and pursue process improvements.

Skills

NET backend

REST & SOAP

SQL Server

Unit tests

Architectural patterns

Agile teamwork

English communication

Tools

Entity Framework

Job description

SD Worx is a leading European provider of Payroll & HR services with global reach. We have offices across Europe and in Mauritius. Our purpose is to bring people solutions to life, enabling organisations of all sizes to turn Human Resources into a source of value for both the business and its people.

Our people solutions cover the entire employee journey – from getting people paid to attracting, rewarding and developing talent.

About the role:

We are seeking a Senior Back-end .NET Developer to join our Corporate Data Management (CDM) team within the Data & AI organization at SD Worx. The team is responsible for ensuring central, well-integrated corporate data across the enterprise and enabling seamless data flows between business-critical systems. This is a growth position created to strengthen our long-term in-house .NET development capabilities and support strategic initiatives such as Master Data Management and integrations with enterprise platforms. You will play a key role in designing, developing, and maintaining backend solutions that support data integration, business processes, and enterprise applications across the organization. The ideal candidate is a hands‑on developer with strong .NET expertise, a proactive mindset, and the ability to collaborate effectively with technical and business stakeholders.

Which tasks can you expect?

• Design, develop, and maintain back-end applications using .NET Framework, .NET Core and C#.
• Develop and support integrations between corporate systems, legacy applications, and data platforms.
• Contribute to the implementation of the Master Data Management (MDM 2.0) initiative and related integration projects.
• Deliver high-quality software in line with agreed timelines, standards, and best practices.
• Perform root cause analysis, troubleshoot issues, and drive resolution of defects.
• Write, maintain, and execute unit and integration tests as part of the development lifecycle.
• Conduct code reviews and contribute to continuous improvements in code quality.
• Collaborate with Product Owners, Technical Leads, and cross-functional teams to translate business requirements into technical solutions.
• Ensure solutions are scalable, maintainable, and aligned with architectural guidelines.
• Support CI/CD processes and application deployment activities.
• Create and maintain technical documentation, development standards, and solution designs.
• Take ownership of development activities and proactively identify areas for process and system improvements.

What do you have to offer?

• Minimum 5 years of hands‑on experience developing back‑end applications with .NET Framework, .NET Core, and C#.
• Strong understanding of software development principles, application architecture, and integration patterns.
• Experience building and consuming REST and SOAP services.
• Solid knowledge of SQL Server, Entity Framework, and database design best practices.
• Experience writing Unit and Integration Tests as part of a quality‑driven development approach.
• Ability to translate business requirements into scalable and maintainable technical solutions.
• Excellent analytical, problem‑solving, and troubleshooting skills.
• Strong communication skills in English and ability to collaborate effectively with technical and business stakeholders.
• Experience working in Agile teams and international environments.
• A proactive, self‑starting mindset with a passion for continuous learning and improvement.
• Ability to manage multiple priorities while maintaining high quality standards.

What do we have to offer?

• Comprehensive training and development programs.
• Flexible working schedule
• Private medical insurance 100% covered by SD Worx
• 25 vacation days
• 18 hours for personal matters
• Reduced summer hours: 36 hours instead of 40 per week, for 4 weeks (to be chosen in July or August)
• Cobee flexible retribution options: meals, transportation, etc.
• Laptop and equipment provided
• Workation: possibility to work from abroad (where SD Worx has legal entity, up to 4 weeks per year)
• Learning opportunities: language courses (as per availability), individual training bonus, an individual development plan, and professional training
• Career growth: whether you want to become more of an expert in your field or want to expand your knowledge more horizontally, there is always room to grow within SD Worx!

From many places, we work as one, moving from better to best together.

SD Worx embraces diversity in the workplace. Diversity brings inspiration and innovation to our company. We particularly welcome applications from qualified talent, regardless of origin, nationality, gender, skin color, ethnic and social background, religion, age, disability, sexual orientation, or stage of life.

Salary range information will be shared with candidates during the initial interaction with the Talent Acquisition team, either by phone or email.

All hiring decisions are made based on skills, experience and role-related qualifications.

All hiring decisions are made based on skills, experience and role-related qualifications.