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Senior Backend Developer

Katowice, PL, 40-202

SD Worx is a leading European provider of Payroll & HR services with global reach. SD Worx’s +4000 employees operate in countries all over Europe and in Mauritius. Our goal? We bring people solutions to life. So companies of any size can turn Human Resources into a source of value for the business and the people in it. Our people solutions span the entire employee journey, from getting people paid to attracting, rewarding, and developing talent.

The Senior Developer will have to ensure the delivery of quality software solutions via development, testing or support activities and is also actively involved in providing support to junior team members via reviewing and coaching activities if required.

As for personality, we would like to welcome someone who: 

  • is a mature professional: someone who is autonomous, proactive and takes initiative
  • is critical and is able to challenge proposed solutions and ways of working
  • is able to take a pragmatic approach in order to come up with solutions which are simple and feasible
  • will always keep the end user in mind
  • is result driven, and for whom making a deadline is a challenge


Essential Duties

  • Functional and technical understanding and analysis of user stories in close collaboration with different stakeholders so that business requirements are clearly understood
  • Development of these user stories as working software in team-oriented collaboration in an agile way of working with feeling for UI/UX and focus on the customer
  • Design and development of software modules and business process logic
  • Taking the total ownership regarding scope, content and quality in accordance with agreed schedules, procedures and standards
  • Root cause analysis of defects/issues and drive resolution
  • Good communication skills (verbal & written) to achieve excellent customer service
  • Monitor and control metrics for development, testing or support area
  • Being a team player and flexible



  • Degree holder in IT/IT related fields




  • ASP.NET & ASP.NET Core
  • Rest Api's 
  • HTML, CSS  
  • Javascript , Typescript, Angular 
  • SQL, EF
  • Git, Scrum 
  • Azure Devops



  • At least 5 years’ experience in software development
  • Experience of both client-side and server-side technologies
  • Experience in working in Agile development teams
  • Experience of continuous integration, app build and delivery systems
  • Experience of writing secure applications and coding defensively
  • Experience of writing unit tests
  • Knowledge of design and architectural patterns
  • Experience with any public cloud e.g. Azure, AWS
  • Excellent analytical and problem-solving skills


Additional Advantages:


  • Knowledge of DDD
  • Knowledge of DAPPER
  • Experience with NOSQL

SD Worx offers you, besides a competitive salary and benefits package, the autonomy and flexibility to take ownership of your work.  With the possibilities of flexible working hours, homework, working from other offices,… you can organize your own work.

For us, learning and innovating are like breathing, inspiring us to always go beyond.  We offer multiple trainings, projects… where you will learn from experts or in practice. From the start you will be engaged in your team, where we share knowledge, talents and celebrate our differences.

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

Apply now »