Mission Overview: Join Keystone Solutions as a Senior .NET Application Architect on a consultancy mission with our client. You will operate within a dynamic IT environment of more than 150 professionals, collaborating with both Dutch- and French-speaking stakeholders. The client's IT organization works in agile mode (scrum methodology), with multidisciplinary development teams. The Enterprise Architecture Team consists of 4 people and is expanding capacity with this role. The client is currently evolving towards a microservices architecture. As a Keystone Solutions consultant, you will perform all responsibilities and meet all requirements listed below while working closely with the client. Consultancy Model: This is a consultancy position through Keystone Solutions. You will work on-site at the client location in Brussels for part of the week and remotely for the remainder, embedding with client teams while benefiting from Keystone Solutions' community, coaching, and career development. You will represent Keystone Solutions' values and quality standards on every engagement while partnering directly with the client's stakeholders and teams. Key Responsibilities: As an Application Architect, you guarantee that the architecture of the IT system and landscape continues to evolve. You help and support the development teams to deliver quality in line with the objectives of the customer and product management. You make the architectural vision understandable and applicable for the teams. You clarify the value and operation of models, standards, and patterns, and you support their implementation. Concretely, you define the application and integration architecture for a complete rewrite of an important business application in a cloud-based environment. You will carry out these responsibilities as a Keystone Solutions consultant working closely with the client in an agile (scrum) setting within a bilingual environment. Required Experience and Competencies: Level: Senior Master's degree or equivalent through experience Minimum 10 years of experience as a hands-on Application Architect Minimum 5 years of experience in an Agile architecture environment (SAFe Scaled Agile Framework) Business knowledge of the social status of the self-employed is an advantage These requirements will be performed under Keystone Solutions' consultancy model while working closely with the client. Technical Requirements: Experience as an application architect in a .NET environment with microservices (10 years) Setup and use of Azure Cloud computing services, gRPC, Dapr, Azure SQL (5 years) Setup and use of container solutions (e.g., Azure Container Apps, Azure Kubernetes Service) (3 years) NServiceBus (2 years) Knowledge and use of architecture frameworks and tooling (Domain-Driven Design, event-based architecture, Sparx EA, DrawIO, ) Knowledge of Oracle PL/SQL is an advantage Behavioral Competencies: Delivers results autonomously and responsibly Can engage at a strategic level with C-level stakeholders and work very practically with development teams (developers, testers, etc.) Team player: as a servant leader, stimulates co-creation to achieve a broadly supported solution Languages: Dutch or French as a native language Fluent communication in the other national language (both spoken and written) English: fluent communication Work Regime: Hybrid: 2 days on-site at the client in Brussels and 3 days teleworking Consultancy Advantages with Keystone Solutions: Consultancy Nature of Work: Operate as a Keystone Solutions consultant embedded within client teams, combining on-site collaboration and remote delivery while upholding our standards and best practices. Dynamic Projects: Tackle diverse challenges across evolving architectures, microservices transformations, and cloud-native initiatives, with opportunities to contribute to multiple client engagements over time. Turbo-Charged Learning and Development: Access continuous learning, peer coaching, architecture communities of practice, and support for certifications relevant to .NET, Azure, microservices, integration, and agile architecture. Ambition Skyrocketing within a Consultancy Framework: Accelerate your career through varied client contexts, responsibility growth, and impact at both strategic and hands-on levels. Keystone Solutions' Values in Action: Being a K-Stone means bringing integrity, excellence, collaboration, and customer-centricity to every client project. You will be a trusted advisor, an enabler for high-performing teams, and an advocate for robust, scalable, and secure architectures that create tangible business value. Location: Brussels (on-site presence required 2 days per week at the client; hybrid model). How to Apply: If you are ready to tackle technical and strategic challenges in a dynamic consultancy environment, apply today at Keystone Solutions Career Portal .