Question
Full-time
10+

Senior Application Developer

4/16/2026

The Senior Application Developer will design, develop, and maintain complex applications using the .NET stack and modern front-end frameworks. They will also lead solution architecture, perform system integrations, and ensure high-quality code through technical reviews and adherence to standards.

Working Hours

40 hours/week

Company Size

1,001-5,000 employees

Language

English

Visa Sponsorship

No

About The Company
Arηs Group, Part of Accenture - is a market leader in the management of complex IT projects and systems. Founded in Luxembourg in 2003. With our focus on getting things done, we help our clients achieve their goals with best-of-breed solutions, superior execution and exceptional services. We offer bespoke software development, data science, infrastructure, digital trust and mobile development to government institutions at national and European level, telecom providers, and financial institutions, among others. Our bold company culture is built around working hard and playing hard, with a flat and agile structure that lends itself to efficiency and employee empowerment. We value our diverse workplace of close-knit teams and provide a place where everyone can be supported to learn and evolve.
About the Role

Company Description

Arηs Group, Part of Accenture, specializes in the management of complex public sector IT projects, including systems integration, informatics and analytics, solution implementation and program management. Our team helps lead clients through digital and information systems design, bringing expertise in a variety of areas ranging from software development, data science and security management to machine learning, cloud, and mobile development. Arηs Group was acquired by Accenture in July 2024. 

Job Description

Software Development & Engineering

  • Design, develop, test, and maintain applications using .NET 6 (or newer), C#, ASP.NET, ASP.NET MVC, ASP.NET Web API, Entity Framework, and VB.NET.
  • Develop modern front-end solutions using frameworks such as React or Vue.js.
  • Implement robust unit and integration testing for both front-end and back-end components.
  • Build and maintain Web APIs and perform complex system integrations.
  • Ensure high-quality code through technical reviews and code quality standards.

Architecture & System Design

  • Lead the design and implementation of solution architecture, including:
    • Software components
    • Design patterns
    • Database schemas
    • Cloud and on-premises infrastructure
  • Contribute to the evolution of system architecture aligned with ICT strategy.
  • Prototype and deliver new features based on prioritized backlog.

Cloud & Microsoft Ecosystem

  • Work extensively with:
    • Microsoft Entra ID (Azure AD)
    • Azure App Services
    • Azure DevOps (CI/CD pipelines)
    • Microsoft Graph API
  • Utilize Azure Blob Storage and/or Azure Data Lake Storage Gen2.
  • Implement automation scripts using PowerShell or similar technologies.

SharePoint & Microsoft 365

  • Develop and maintain enterprise solutions using SharePoint Online.
  • Implement solutions using:
    • SPFx (SharePoint Framework)
    • PnP (Patterns & Practices) tools
  • Configure and manage:
    • Site collections and subsites
    • Custom content types and site columns
    • Workflows and governance policies

Power Platform & AI Tools

  • Develop solutions using Microsoft Power Platform (Power Apps, Power Automate, etc.).
  • Utilize Microsoft Copilot Studio where applicable.

Database & Performance

  • Design and manage SQL Server databases, including:
    • Stored procedures
    • Performance tuning and troubleshooting
  • Work independently with SQL and database optimization techniques.

UI/UX & Web Technologies

  • Implement responsive and user-friendly interfaces using:
    • HTML5, CSS3, JavaScript, XML
    • Frameworks such as Bootstrap
  • Ensure compliance with UI/UX standards and usability guidelines.

DevOps & Process

  • Implement and maintain CI/CD pipelines.
  • Work with JIRA for task tracking and reporting.
  • Maintain up-to-date documentation and ticket status on a daily basis.

Collaboration & Reporting

  • Collaborate with:
    • ICT Project Managers
    • Solution Architects
    • Business Analysts
    • Testers and Product Owners
  • Participate in analysis, design, and delivery of new features and improvements.
  • Provide input on technical decisions and solution strategies.

Monitoring, Security & Support

  • Monitor system usage and performance (analytics).
  • Conduct security audits and provide recommendations.
  • Support website maintenance and operational activities.

Documentation

  • Produce and maintain:
    • Solution architecture documentation
    • Operational manuals
    • Release notes and version documentation
    • User manuals and technical guides

Qualifications

  • Bachelor's plus a minimum of 10 years of relevant professional experience
  • Fluency, in English, to at least B2 level according to the CEFR (Common European Framework of Reference for Languages).
  • Strong experience with:
    • .NET (6 or newer), C#, ASP.NET stack
    • Entity Framework
    • JavaScript frameworks (React or Vue.js)
  • Solid knowledge of:
    • RESTful APIs and system integrations
    • SQL Server and database optimization
    • Azure cloud services
    • SharePoint Online and SPFx
  • Experience with:
    • Azure DevOps and CI/CD pipelines
    • PowerShell scripting
    • Microsoft Graph API
    • Power Platform and Copilot Studio (preferred)

Professional Competencies

  • Ability to work independently with high quality and accountability
  • Strong analytical and problem-solving skills
  • Experience working in Agile/Scrum environments
  • Excellent communication and collaboration skills
  • Strong documentation discipline

Work Environment

  • Enterprise-level ICT environment 
  • Agile collaboration with multidisciplinary teams
  • Combination of cloud (Azure) and on-premises systems
  • Structured project governance and reporting processes

Success Criteria

  • Delivery of high-quality, scalable, and secure solutions
  • Effective collaboration with ICT and business stakeholders
  • Timely updates and accurate reporting in JIRA
  • Adherence to best practices, standards, and architectural guidelines
Key Skills
.NETC#ASP.NETReactVue.jsAzureSQL ServerSharePointPower PlatformCI/CDRESTful APIsPowerShellMicrosoft Graph APIEntity FrameworkJavaScriptSystem Integration
Categories
SoftwareTechnologyEngineeringData & AnalyticsConsulting
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