[Hiring] Senior .NET Developer @Poland and Eastern Europe

Role Description

The project focuses on migrating and modernizing a business-critical enterprise platform for an international company in the rail transportation and asset-leasing sector. The first phase establishes the technical foundation and migrates an initial set of business modules. The priority is to preserve existing functionality and business rules while introducing selected improvements in usability, automation, performance, observability, and security. Delivery follows a phased approach to support operational continuity throughout the transition.

• Building a reusable application platform with shared components and common development patterns.
• Migrating existing business functionality while maintaining functional parity.
• Understanding and documenting complex business rules, data, and dependencies.
• Integrating the new solution with enterprise systems and supporting data migration.
• Delivering incremental releases supported by automated testing, user acceptance testing, and post-release stabilization.

The technology stack includes:

• C# and .NET for backend development
• React and TypeScript for the frontend
• PostgreSQL for data storage
• AWS and Terraform for cloud infrastructure
• xUnit, Vitest, and Playwright for automated testing

The team works in an international delivery environment using Scrum, two-week sprints, and regular refinement, planning, and review sessions. Close collaboration between engineers, business stakeholders, and domain experts is essential to understanding existing processes and translating them into reliable software.

For candidates, the project offers an opportunity to combine modern application development with the challenges of enterprise migration. The work is particularly relevant to professionals who enjoy understanding complex systems, building reusable solutions, and delivering improvements within clearly defined business and technical constraints.

Qualifications

• Practical experience using AI-powered assistants (e.g. Claude Code, GitHub Copilot, Cursor) to improve productivity, quality, or decision-making in software delivery.
• Work from the European Union region and a work permit are required.

Requirements

• Experience applying GenAI in a more structured way within the SDLC, including defined workflows, prompt patterns, or tool integrations embedded into daily work (nice to have).
• Interest in and familiarity with emerging AI-driven practices (e.g. agent-based workflows, automation patterns, AI-augmented development), with a willingness to explore and experiment beyond standard approaches (nice to have).