Fullstack Developer

Fullstack Developer At SD Worx, we are looking for energetic people to join our team. With us, you get the chance to showcase your talents and grow like never before! Ready, set, apply! We usually respond within a week About SD Worx 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: As Fullstack Developer, you will be part of a team responsible for building and maintaining our existing payroll application for the Belgian market: LOS21. Your customers are the hundreds of internal users of this application, and you play an essential role in improving their experience. Together with your colleagues, you improve customer experience every day by following up on new legislation, and simplifying their processes. What do we have to offer? Stable employment conditions: permanent employment contract (after a 3-month probation period) Flexible working hours and remote work opportunities Private medical care (LuxMed) Cafeteria system / Sports card Lunch card (Edenred) Financial allowance for remote work Loans for employees Workation: possibility to work from any SD Worx location (4 weeks per year, EU only) Life insurance Holiday allowance Free language courses (during your working hours) Annual bonus Integration events Free parking spaces for employees Referral program PPK (Employee Capital Plans): 3.5% employer contribution Learning opportunities: through an individual development plan and professional training Career growth: whether you want to become more of an expert in your field or expand your knowledge horizontally, there’s always room to grow within SD Worx! Which tasks can you expect? Cooperating closely with the team to understand requirements for legacy applications Contributing throughout all phases of the product lifecycle, from ideation and development to maintenance Devising solutions that are both functionally effective and technically robust Troubleshooting, debugging, fixing, and implementing solutions Participating in code reviews and knowledge-sharing activities within the team Providing third-line support to end users when required Working independently and proactively identifying solutions Handling periods of intensive workload effectively and efficiently Collaborating with server and network support departments What do you have to offer? 5+ years of .NET development experience within complex software environments Practical expertise in WinForms application development Strong SQL skills and database querying knowledge Proficiency with Git and modern version control practices Ability to work across both front-end and back-end technologies Comfortable using Visual Studio as a primary development environment Familiarity with AI tools and their application in software development Degree in Information Technology or equivalent hands-on experience and expertise Fluent English communication skills, both written and spoken Nice to have Knowledge of DB2 databases Familiarity with NServiceBus messaging architecture Experience working with Entity Framework Understanding of Azure DevOps, CI/CD pipelines, and release processes Exposure to ASMX web services Experience collaborating in Agile/Scrum development teams Salary range information will be shared with candidates during the initial interaction with the Talent Acquisition team, either by phone or email. SD Worx values diversity and inclusion in the workplace. We welcome applications from all qualified candidates regardless of origin, nationality, gender, gender identity, sexual orientation, age, disability, religion, ethnic or social background, or stage of life. All hiring decisions are made based on skills, experience and role‑related qualifications. Team IT & Technology Role IT & Technology (Products) Locations Katowice, Wrocław, Warsaw, Poznań Remote status Hybrid