Job
- Level
- Senior
- Job Field
- Application, Back End
- Employment Type
- Full Time
- Contract Type
- Permanent employment
- Location
- Bielefeld
- Working Model
- Hybrid, Onsite
Job Summary
In this role, you develop software solutions for digital transformation in construction, maintain and modernize WinForms applications, and work on cloud architectures using .NET and Docker.
Job Technologies
Your role in the team
- With our ERP construction software Pro-Bau/S® AddOne, we digitalize construction companies in Germany. You ensure that our software remains technically future-proof – from classic WinForms modules to modern Blazor UIs and mobile MAUI apps.
- Maintain and further develop existing WinForms construction software.
- Decouple business logic from the WinForms client and convert it into deployable, serviceable units.
- Containerization (Docker) of backend components; establishment of reproducible build and deployment paths.
- Development of a cloud/web architecture (API-First, stateless services).
- New development of an existing Next.js web application.
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Our expectations of you
Qualifications
- T-SQL know-how including optimization of existing queries / query plans.
- Proficient handling of WinForms in mature codebases: maintenance, refactoring, gradual modernization without the need for a rewrite.
- .NET Framework (4.8) and .NET (8/10+) - Ability to migrate between legacy and modern stack.
- Agentic Coding with Claude Code: autonomous management of tool-use workflows, context management, verification of generated codes instead of blind adoption.
Experience
- Solid C# skills, with several years of practical experience at a senior level.
- Experience with layer separation and decoupling of UI-bound business logic (a prerequisite for any cloud migration).
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What we offer
- An experienced team with an open feedback culture.
- A permanent position in a successful software company.
- A modern working environment and digital tools.
- Personal development through training and further education.
- Company benefits (e.g., Jobrad, employee events, company pension scheme).
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Benefits
Work-Life-Integration
Health, Fitness & Fun
Topics You Will Work On
Job Locations
About Your Employer
Husemann & Fritz - EDV-Organisations- und Beratungs GmbH
Wir sind ein bundesweit agierendes Softwareunternehmen und zählen mit über 12.000 Anwendern zu den führenden Anbietern von baubetrieblicher Standardsoftware in Deutschland. Als Spezialist für Bausoftware bieten wir eine vollständig integrierte und datenbankbasierte Komplettlösung für mittelständische Unternehmen. Durch den modularen Aufbau, die Digitalisierung von Geschäftsprozessen und durch die mobile Einsatzmöglichkeit können die alltäglichen Arbeitsabläufe beschleunigt und die Zusammenarbeit mit Kollegen, Auftraggebern, Nachunternehmern und Lieferanten optimiert werden. In allen Phasen der Projektabwicklung - von der Anfrage bis zur Zeiterfassung - können Sie sich auf praxiserprobte und leistungsstarke Funktionen verlassen.
Description
- Founding Year
- 1991
- Company Type
- Established Company
- Working Model
- Hybrid, Onsite
- Industry
- Consulting, Internet, IT, Telecommunication
Software developer - Application development
- Location
- Bielefeld
- Working Model
- Hybrid, Onsite
- Diversity
- Open for all genders
