keystone-solutions
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Senior .Net Developer

BelgiumBelgium·Brusselssenior
.Net DeveloperSoftware Engineering
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Quick Summary

Key Responsibilities

Actively participate in the development of software components in .

Technical Tools
.Net DeveloperSoftware Engineering

As a Senior .NET Developer, you will play a key role in designing, developing, and maintaining robust software solutions based on Microsoft technologies. You will bring your technical expertise to ensure code quality, solution sustainability, and system performance. Additionally, you will serve as a technical mentor for other team members. This position is a consultancy mission at a client site representing Keystone Solutions.


Responsibilities

~1 min read
  • Actively participate in the development of software components in .NET (Framework and Core);
  • Design scalable technical solutions in collaboration with the architecture team;
  • Provide technical guidance to team members and foster a culture of excellence;
  • Conduct code reviews and ensure adherence to best development practices;
  • Analyze functional requirements with analysts and translate them into technical solutions;
  • Ensure the quality, performance, security, and maintainability of applications;
  • Participate in optimizing system performance;
  • Integrate and evaluate new technologies in line with business objectives.

  • Critical analysis and information integration skills;
  • Structured and solution-oriented thinking;
  • Ability to generate viable alternatives and draw relevant conclusions;
  • Technical leadership and collaborative spirit;
  • Resilience and adaptability to technical or contextual changes.

  • Fluency in one of the two national languages: FR or NL (C2 level);
  • Very good level of English (C1 level).

What We Offer

~1 min read

We offer an interesting job in ICT and Data services that impacts society, with numerous benefits:

A good work-life balance;
Flexible working hours within a 40-hour week (7:30 AM to 8:00 PM with fixed slots between 9:00 AM and 12:00 PM and 1:00 PM and 4:00 PM);
Possibility of remote work;
Workspaces organized according to activities;
Easy accessibility via public transport;
Car and bike parking in the building;
Individual lockers;
Company restaurant;
Various self-development opportunities: training and learning possibilities (to be pursued outside working hours) via our e-academy self-training platform or through the Microsoft Enterprise Skills Initiative platform.
  • ASP .NET Web API - Level: Expert - Most recent: Any time
  • Authentication/Authorization (JWT, OIDC, claims) - Level: Confirmed - Most recent: Any time
  • Blazor - Level: Junior - Most recent: Any time
  • C# / .NET (Core, 10) - Level: Expert - Most recent: Any time
  • Entity Framework Core - Level: Expert - Most recent: Any time
  • MVC - Level: Expert - Most recent: Any time
  • REST API's - Level: Confirmed - Most recent: Any time
  • REST, Swagger/OpenAPI - Level: Confirmed - Most recent: Any time
  • SQL Server - Level: Confirmed - Most recent: Any time
  • Testing (unit + integration) - Level: Confirmed - Most recent: Any time

Requirements

~1 min read

Dutch
Level Active knowledge
English
Level Passive knowledge
French
Level Active knowledge

Location & Eligibility

Where is the job
Brussels, Belgium
On-site at the office
Who can apply
BE

Listing Details

First seen
July 8, 2026
Last seen
July 8, 2026

Posting Health

Days active
0
Repost count
1
Trust Level
44%
Scored at
July 8, 2026

Signal breakdown

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keystone-solutionsSenior .Net Developer