Senior Software Solution Designer - (m/f/d)

Project Introduction

We are looking for an experienced Software Solution Designer to join our international team and contribute to the development and continuous improvement of a strategically important system within the Deutsche Telekom Group.

The project supports the planning, construction, inventory, configuration, operation, and optimization of mobile radio networks. Its applications and services provide a consistent data foundation for internal systems and support collaboration with external partners across the mobile network lifecycle.

WHAT WILL YOU DO:

• Translate business needs and customer requirements into effective, scalable IT solutions.
• Analyze and refine requirements, user stories, business processes, and functional specifications.
• Design end-to-end solutions for mobile radio network infrastructure across applications, services, APIs, and system interfaces.
• Decompose complex requirements into clear, development-ready solution components.
• Create and maintain solution designs, process models, interface specifications, and system documentation.
• Identify involved systems, interface partners, dependencies, and integration impacts.
• Define and assess relevant non-functional requirements, including performance, security, availability, and maintainability.
• Design and validate REST API interactions, data flows, and mappings.
• Analyze existing mobile radio network systems and identify opportunities for improvement and simplification.
• Evaluate solution alternatives and communicate recommendations to business and technical stakeholders.
• Collaborate closely with Product Owners, business analysts, developers, architects, DevOps teams, and system engineers.
• Support implementation, testing, rollout, and continuous improvement of the solution.
• Contribute to a clear, consistent, and maintainable system landscape.
• Document and communicate solution principles, guidelines, and design decisions.

YOU WILL SUCCED IF YOU:

• Have at least five years of experience in solution design, software architecture, business analysis, or a related role within complex IT environments.
• Have experience designing business applications and end-to-end IT solutions across multiple systems.
• Understand microservice-based architectures, distributed systems, and API-driven integration.
• Are able to analyze system dependencies, integration patterns, business processes, and technical constraints.
• Can create clear models and diagrams using UML and BPMN, including process, activity, sequence, and use-case diagrams.
• Have experience defining functional and non-functional requirements and turning them into implementable solutions.
• Are familiar with REST APIs and tools such as Swagger or Postman.
• Have experience working with Agile methods, such as Scrum, in cross-functional teams.
• Are confident communicating in written and spoken English at least at B2 level.

Would be nice to have:

• Knowledge of mobile telecommunications or mobile radio network infrastructure.
• Experience contributing to IT guidelines, solution blueprints, or architecture documentation.
• Experience supporting testing, implementation, and rollout activities.

IT Technical Skills

• Solution design and architecture, Business and system analysis
• End-to-end IT solution design
• Microservice architecture
• REST APIs and system integration, UML and BPMN
• Agile methods and Scrum, Jira, Confluence, and Enterprise Architect
• IT service and business process understanding

Soft skills

• Strong communication, presentation and organizational skills
• Analytical and structured thinking, Result orientation
• Customer and business orientation
• Problem-solving and decision-making
• Collaboration and knowledge sharing
• Conflict management and diplomacy

Other Skills

• Organisational skills
• Diplomacy
• Project management

Other criteria or requirements

• Work collaboratively with others to achieve goals
• Be a persistent, creative problem ­solver
• Remain cool and effective in a crisis
• Understand business needs and know how to create the tools to manage them
• Extensive knowledge of business environment and IT, business process, organization, implications of changes
• Experience in business analysis, business process design and end-to-end IT solution design
• Experience in introducing comprehensive IT solutions in a complex IT application landscape, analyzing and preparing a new solution, testing, participation in roll outs
• Experience in creating topic-specific IT guidelines and blueprints and communicating/consulting this content with system users

Benefits

We believe in balance between work and personal life. An attractive and extensive work-life balance portfolio guarantees lasting motivation for employees and thus a better quality of life, promotes physical and mental well-being and contributes to a positive work environment. All this with the aim of providing more freedom in reconciling …