Fullstack Developer

Posted Yesterday
Be an Early Applicant
4 Locations
Hybrid
Senior level
HR Tech
The Role
Build and maintain a Belgian payroll application using full-stack .NET development. Responsibilities include requirements analysis, solution design, development, troubleshooting, debugging, maintenance, code reviews, third-line user support, and collaboration with server and network teams. The role contributes across the full product lifecycle and requires independent problem-solving, strong SQL skills, WinForms expertise, and experience working in complex software environments.
Summary Generated by Built In

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.

Skills Required

  • 5+ years of .NET development experience in complex software environments
  • Practical experience developing WinForms applications
  • Strong SQL skills and database querying knowledge
  • Proficiency with Git and modern version control practices
  • Ability to work across front-end and back-end technologies
  • Experience 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 written and spoken English communication skills
  • Knowledge of DB2 databases
  • Familiarity with NServiceBus messaging architecture
  • Experience 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

SD Worx Compensation & Benefits Highlights

The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about SD Worx and has not been reviewed or approved by SD Worx.

  • Flexible Benefits Benefits are frequently positioned as flexible and customizable, including cafeteria-style options and country-specific choices. This tailoring (e.g., mobility, extra insurance, or additional leave) is presented as a way to align rewards to individual needs.
  • Leave & Time Off Breadth Leave and time off options appear broad in several markets, with multiple leave types from day one and, in some countries, generous holiday allowances or the ability to trade for extra days. These provisions are often linked to strong work–life balance and flexibility.
  • Wellbeing & Lifestyle Benefits Wellbeing and lifestyle offerings include workation policies, wellness schemes, vouchers and discounts, and Employee Assistance Programs. Hybrid work practices and allowances further round out the day‑to‑day experience.

SD Worx Insights

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The Company
HQ: Antwerp
3,403 Employees
Year Founded: 1945

What We Do

We spark success at the heart of your business so you and your people can thrive. About SD Worx In today’s new world of fluid work, people want to be inspired by what they do and have the freedom to focus on what matters. Organisations need a dynamic, motivated workforce empowered by smart technology. As a leading European provider of integrated HR solutions, SD Worx turns HR into a source of value for their customers’ business and the people that work for them. SD Worx delivers HR solutions across the entire employee lifecycle, from paying employees to attracting, employing, rewarding and developing the talent who make businesses succeed. SD Worx powers performance through four core capabilities: software, outsourcing, consultancy and data-driven insights. SD Worx is the trusted leading European provider of end-to-end HR solutions for all organisations and workers. About 90,000 small and large organisations across Europe place their trust in the company and its +75 years' worth of experience. SD Worx calculates the salaries of approximately 5.7 million employees and ranks among the top five worldwide. The more than 7,500 employees operate in Belgium (HQ), Austria, Bulgaria, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Hungary, Ireland, Italy, Luxembourg, Mauritius, Netherlands, Norway, Poland, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland and the UK. SD Worx achieved a consolidated revenue of EUR 1.058 billion in 2023.  More info on www.sdworx.com

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