Senior Full Stack Developer

Format: Full-time · Fully remote · Long-term (until 2027/2028, with option for extension) Location: EU · No citizenship restrictions Workload: 4–5 days per week · ~320 person-days per year Start: ASAP

About the Role

Continuous maintenance, operation, and further development of a historically evolved web-based tool used for international promotion planning. The system operates in a retail environment and is built around an Atlassian-based infrastructure.

Responsibilities

• Ongoing maintenance, operation, and further development of the application and related middleware
• Analysis and understanding of the existing codebase and system architecture
• Development of new functionalities, including import/export features
• Design and implementation of solution approaches within the existing system
• Identification, analysis, and resolution of complex technical issues

Requirements

• Backend: ASP.NET Core MVC
• Frontend: JavaScript, jQuery, AJAX, API integrations
• REST API development
• PostgreSQL, SQL optimization
• IIS hosting and deployment, Windows Server administration
• Experience maintaining and enhancing legacy systems
• Integration within Atlassian-based environments (Jira/Confluence)
• Agile methodologies: Scrum, Kanban
• Solid understanding of retail processes, especially In & Out promotion planning
• English B2 · German B2 — nice to have