Technical System Designer

Your responsibilities

• Translate requirements and acceptance criteria into technical designs that define system behavior, data flows, inter-system contracts, component responsibilities, and error handling.
• Analyze existing code and application behavior to validate proposed solutions and make effective use of proven mechanisms.
• Design solutions in collaboration with business analysts, solution architects, developers, and application administrators, and support the team during implementation.
• Conduct targeted analysis of application and IT infrastructure performance, identify the causes of issues, and recommend optimizations.
• Evaluate new technologies and IT tools, prepare recommendations, and contribute to decisions about their adoption within the system.
• Help strengthen data and system security by designing secure solutions, identifying risks, and coordinating actions with the relevant teams.
• Use AI tools in practice to analyze, design, and document changes, while critically verifying their output.
• Work with other departments to understand their technology needs and agree on the scope of changes.
• Work in an Agile team, solve technical problems, and continuously improve ways of working.
• Document design decisions and communicate the scope of changes, risks, and solution quality to stakeholders.
• Help shape the system’s development strategy by identifying architectural needs, proposing directions for change, and contributing to decision-making.

Our requirements

• At least 3 years of experience in the technical design of IT systems or significant architectural changes.
• At least 2 years of hands-on commercial software development experience, with the ability to read code and trace the actual flow of a request through a system.
• Ability to translate acceptance criteria into a feasible technical design that aligns with the system architecture.
• Experience analyzing existing code and designing extensions to established mechanisms.
• Practical knowledge of frontend and backend web application architecture, including data flows between them, REST/JSON contract design, and integration with other systems.
• Ability to design flexible, configurable solutions and assess the impact of changes on related processes.
• Experience diagnosing technical and performance issues and recommending application and infrastructure optimizations.
• Knowledge of authentication, authorization, and data protection principles in application design.
• Hands-on experience using AI tools for code analysis, design, implementation, testing, or documentation, and the ability to critically evaluate their output.
• Ability to clearly document technical decisions and collaborate with analysts, developers, architects, and other stakeholders.

Optional

• Experience with microservices architecture and containerized applications.
• Familiarity with tools for documenting and testing APIs and creating flow diagrams.
• Knowledge of the AI SDLC and principles for safely integrating AI into the software development lifecycle.
• Experience improving team workflows with AI, for example, in code analysis, technical design preparation, or change reviews.

Benefits

• sharing the costs of sports activities
• private medical care
• sharing the costs of professional training & courses
• life insurance
• remote work opportunities
• flexible working time
• corporate products and services at discounted prices
• mobile phone available for private use
• no dress code
• parking space for employees
• employee referral program
• charity initiatives

Recruitment stages

• 1.
  Wyślij swoje CV
• 2.
  Spotkaj się z przyszłym liderem/ liderką zespołu :)
• 3.
  Witaj w T-Mobile :)

T-Mobile