Medior Backend .NET Developer
Quick Summary
Understand and interpret UML and BPMN models. Know, use, and manage SQL Server databases from version 2016 to 2025. Know, use, and manage an ORACLE database from version 19.
The service in which the person will be integrated is predominantly French-speaking. Therefore, it is essential that the candidate is fluent in French.
As part of the development of core business applications, we are seeking a Medior Backend .NET Developer for a consultancy mission at a client site representing Keystone Solutions. You will be hired by Keystone Solutions to work on diverse client projects, allowing you to tackle technical and strategic challenges in a dynamic consultancy environment.
Responsibilities
~1 min read- →Understand and interpret UML and BPMN models.
- →Know, use, and manage SQL Server databases from version 2016 to 2025.
- →Know, use, and manage an ORACLE database from version 19.
- →Apply design patterns based on architect recommendations.
- →Develop REST services using .NET Framework and .NET 8 and above.
- →Develop interfaces in ASP.NET WebForms / MVC, .NET 4.5 and above.
- →Develop in XML and JSON.
- →Know and use W3C standards.
- →Know and use WebAPI, WCF REST, WCF, and Web Services.
- →Know and use Azure DevOps with GIT and TFVC.
- →Practical knowledge of Redgate tools is a plus.
- →Know and use Entity Framework Core.
- Ability to develop maintainable, high-performance code that adheres to team development standards.
- Experience in corrective and evolutionary maintenance of existing applications.
- Knowledge of SOLID principles and best practices in object-oriented development.
- Experience in writing and executing unit tests.
- Ability to diagnose and resolve technical incidents.
- Experience working in an Agile (Scrum) environment.
- Autonomy in carrying out assigned developments.
- Analytical and problem-solving mindset.
- Ability to collaborate effectively with analysts, architects, and other developers.
- Good communication skills and a sense of teamwork.
- Rigorous, proactive, and quality-oriented.
Requirements
~1 min readThe service in which the person will be integrated is predominantly French-speaking. Therefore, it is essential that the candidate is fluent in French.
If you are ready to tackle technical and strategic challenges in a dynamic consultancy environment, apply today at Keystone Solutions Career Portal.
Dutch
Level Passive knowledge
English
Level Passive knowledge
French
Level Native
- .Net - Level: Confirmed - Most recent: This year
- .NET Core - Level: Confirmed - Most recent: This year
- Agile - Level: Confirmed - Most recent: Any time
- Azure DevOps - Level: Confirmed - Most recent: This year
- Entity Framework Core - Level: Confirmed - Most recent: Any time
- GIT - Level: Confirmed - Most recent: 1 to 3 years ago
- JSON - Level: Confirmed - Most recent: This year
- RESTful API - Level: Confirmed - Most recent: 1 to 3 years ago
- Scrum - Level: Confirmed - Most recent: This year
- Soap API - Level: Nice to have - Most recent: Any time
- SOLID - Level: Confirmed - Most recent: Any time
- Sprint - Level: Confirmed - Most recent: Any time
- UML - Level: Nice to have - Most recent: Any time
- Visual Studio - Level: Confirmed - Most recent: 1 to 3 years ago
- XML - Level: Confirmed - Most recent: Any time
Location & Eligibility
Listing Details
- First seen
- September 28, 2026
- Last seen
- September 28, 2026
Posting Health
- Days active
- 0
- Repost count
- 0
- Trust Level
- 56%
- Scored at
- September 28, 2026
Signal breakdown
Browse Similar Jobs
Stay ahead of the market
Get the latest job openings, salary trends, and hiring insights delivered to your inbox every week.
No spam. Unsubscribe at any time.