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

Employment type
Full-time

Work arrangement
Hybrid