Deutsche Telekom IT Solutions

Senior .NET Developer (Legacy Specialist & AI Expert)

Pécs,Budapest,Debrecen, hu Full-time On-site
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Job Description

The Project: Internal Support Tools Evolution   You are joining an initiative focused on the evolution, modernization of the Internal Application Landscape. This project involves the strategic transition of well-known cloud services and legacy .NET architectures into a next-generation, AI-augmented, and cloud-native software landscape.  Our goal is not simply to "maintain" the existing system, but to proactively transform it—ensuring sovereignty, high-performance scalability, and seamless handover readiness through disciplined engineering.  Our Engineering Philosophy  We operate at the intersection of Legacy Stability and Modern Innovation. Our approach is defined by:  AI-Augmented Engineering: We utilize advanced AI development environments (such as Cursor, Windsurf, and Claude Code) and cutting-edge model families to accelerate code comprehension, refactoring, and documentation.  Disciplined SDLC Patterns: We move beyond traditional development by implementing repeatable, evidence-based SDLC patterns. Every change is backed by structured engineering evidence and rigorous automated testing.  The "Strangler Fig" Modernization: We prioritize risk-mitigated evolution, using sophisticated patterns to wrap, refactor, and eventually replace legacy components.  High-Seniority Autonomy: We operate as a lean, highly autonomous unit. We value "technical detectives" who can navigate ambiguity and perform deep reverse engineering.  Mission To drive the technical execution of both high-impact feature development and the deep-dive modernization of our legacy .NET ecosystem. You will be a specialist who finds satisfaction in solving complex puzzles, utilizing AI-assisted tools to accelerate the modernization of our core systems.  Role Focus This role focuses on high-complexity coding, deep reverse engineering, and AI-augmented productivity. You will work in the trenches of the legacy codebase, extracting logic and implementing modern, testable solutions using the latest AI-powered development environments.  Key Responsibilities  Complex Feature & Refactoring: Design and implement sophisticated new functionalities within the existing .NET ecosystem, ensuring seamless integration with legacy components.  Deep Reverse Engineering: Analyze and deconstruct complex, undocumented, or "spaghetti" legacy code to understand underlying business rules and technical flows.  AI-Augmented Coding: Proactively utilize AI coding assistants and advanced environments (e.g., Cursor, Windsurf, Claude Code, or VS Code extensions) to accelerate code comprehension, documentation, and refactoring.  Robust Testing & Stability: Write high-quality unit and integration tests to "wrap" legacy modules, providing a safety net for all refactoring efforts.  Technical Troubleshooting: Act as a high-level escalation point for complex bugs and performance bottlenecks within the legacy environment.  Internal Tooling: Utilize Microsoft PowerApps to build rapid, lightweight administrative or maintenance utilities to support the development and operations lifecycle. 

Frequently Asked Questions

What does the Senior .NET Developer (Legacy Specialist & AI Expert) role at Deutsche Telekom IT Solutions involve?

The Senior .NET Developer (Legacy Specialist & AI Expert) position at Deutsche Telekom IT Solutions in Pécs,Budapest,Debrecen, hu is a full-time role. The Project: Internal Support Tools Evolution&xa0;&xa0; You are joining an initiative focused on the evolution, modernization of the Internal Application Landscape. This project involves the strategic transition of well-known cloud services and legacy .NET architectures into a next-generation, AI-augmented, and cloud-native software landscape.&xa0; Our goal is not simply to "maintain" the existing system, but to proactively transform it—ensuring sovereignty, high-performance scalability, and seamless handover readiness through disciplined engineering.&xa0; Our Engineering Philosophy&xa0; We operate at the intersection of Legacy Stability and Modern Innovation.

What skills are required for Senior .NET Developer (Legacy Specialist & AI Expert) at Deutsche Telekom IT Solutions?

Key skills for this role include: Scala, .Net, API.

What is the salary for Senior .NET Developer (Legacy Specialist & AI Expert) at Deutsche Telekom IT Solutions?

The salary for this position is not publicly listed. You can negotiate during the interview process. Check Glassdoor or Levels.fyi for estimates.

Is the Senior .NET Developer (Legacy Specialist & AI Expert) position at Deutsche Telekom IT Solutions remote or on-site?

This position is On-site. The role is based in Pécs,Budapest,Debrecen, hu.

How do I apply for Senior .NET Developer (Legacy Specialist & AI Expert) at Deutsche Telekom IT Solutions?

You can apply for this position directly through the employer's careers page. Click the 'Apply Now' button on this page to be redirected to the original listing. Make sure your resume is ATS-optimized. Use SpotChange's free ATS test to check.

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About This Role

Senior .NET Developer (Legacy Specialist & AI Expert) at Deutsche Telekom IT Solutions is a full-time ai & machine learning position in Pécs,Budapest,Debrecen, hu. Key skills include Scala, .Net, API. Education: Bachelor's Degree preferred. Experience: 5+ years.

This role is classified as on-site and is suitable for senior-level professionals. Ghost Score 40/100 (Possibly Stale) indicates this listing is possibly stale — verify on the employer site.

To apply, visit the official application page through the Apply Now button above. SpotChange Jobs provides AI-powered career tools including resume optimization, ATS testing, interview preparation, and salary negotiation assistance.