Software Developer (SharePoint / .NET Core / React)

The position is for a senior Software Developer to work on a long-term international project for a European Union Organisation based in Warsaw. The project focuses on an operational platform built on SharePoint 2019 On-Premises that supports operational activities and reporting processes across multiple teams. The role involves contributing to the design, development, maintenance, and support of enterprise-level software solutions using Microsoft technologies, primarily SharePoint and modern web development.

• Participation in at least one complete software development lifecycle.
• Proven experience developing enterprise-level software systems.
• Strong knowledge of UML and application design.
• Ability to design and develop data, business logic, and UI layers.
• Experience working in Scrum environments.
• Ability to lead and support technical teams.
• Strong technical documentation skills.
• Excellent analytical and problem-solving abilities.
• EU citizenship (mandatory).
• Valid criminal record certificate not older than six months before onboarding.
• English proficiency at B2 level (certificate required or successful language audit).
• Bachelor's degree or higher in Computer Science, Software Engineering, Information Technology, or related ICT field.

Technical Requirements:

• Minimum 4 years of professional IT experience.
• Minimum 2 years experience in a Full-Stack SharePoint Support or Developer role.
• Experience with custom SharePoint development including SDK, workflows, timer jobs, and features.
• Strong experience with Microsoft .NET / .NET Core, Microsoft SQL Server, T-SQL, Azure DevOps Pipelines.
• Experience with Web Services and REST APIs.
• Good knowledge of HTML5, CSS3 (Responsive Design), JavaScript (including ES6), TypeScript, React.

Certifications:

• At least one intermediate-level software development certification relevant to the role or an internationally recognized equivalent accepted by the Contracting Authority.

• Design, develop, and maintain enterprise software solutions.
• Develop and support custom SharePoint solutions, including workflows, features, timer jobs, and SDK-based developments.
• Build and maintain applications using .NET / .NET Core.
• Design and develop data, business logic, and presentation layers.
• Integrate systems using Web Services and REST APIs.
• Participate in Agile/Scrum development activities.
• Produce and maintain technical documentation.
• Collaborate with technical teams and contribute to solution architecture and problem-solving activities.

EU citizenship is mandatory. Candidates must provide a valid criminal record certificate issued no more than six months prior to onboarding. English proficiency at B2 level is required with certification or successful assessment. The employer is the data controller under applicable data protection laws. Data processing is for recruitment purposes only.