Python Test Architecture Engineer - IT Contracting @ Michael Page

• Minimum 5 years of commercial experience in Python programming.
• Experience in creating libraries, frameworks, or architectural components used by other developers.
• Very good knowledge of mechanisms based on abc.ABCMeta and @abstractmethod.
• Hands-on experience in designing contracts and abstract interfaces.
• Very good knowledge of dataclasses, particularly the configuration of frozen=True, kw_True, validation in __post_init__, and safe handling of immutable objects.
• Experience in designing solutions using multiple inheritance and interface composition.
• Good knowledge of topics related to metaclasses and the C3 linearization (MRO) mechanism.
• Practical use of enum.IntFlag and bitwise operations for modeling system functionality and capabilities.
• Knowledge of functools.cached_property, its limitations related to multithreaded safety, and interaction with immutable objects.
• Experience in designing contract tests for abstract interfaces.
• Very good knowledge of pytest.
• Experience working with unit and integration tests.
• Readiness to work in an environment related to hardware emulation and hardware-adjacent systems.
• Ability to create clear technical documentation and effective written communication.

Nice to have:

• Experience related to testing HID devices.
• Knowledge of hardware-in-the-loop systems.
• Experience with devices using DAC/ADC and analog circuits.
• Practical knowledge of hypothesis and property-based testing methodologies.
• Experience in mutation testing.
• Knowledge of embedded systems or firmware environments.

Client from the technology industry (IT / consumer electronics). The team responsible for this recruitment creates and develops a test framework supporting diverse hardware platforms and next-generation products.
The position has been created with a view to further developing shared architectural components used by test engineers and developers working on emulation environments and test automation. The person hired for this position will co-create the technical foundations on which the development of subsequent tools and implementations is based.
This is a proposal for specialists who best thrive in designing libraries, frameworks, and architectural patterns, not solely in creating test cases. The role offers the opportunity for real impact on the quality, scalability, and consistency of solutions used by a broader group of engineers in the organization.
The work environment involves close collaboration with components related to hardware emulation, handling analog and digital signals, and defining universal contracts for multiple hardware implementations.

Industry: Technology & Telecoms

Area: IT Systems & Testing

We offer

• Hybrid work - 3 days a week from the office in Krakow, 2 days remotely
• B2B contract via Michael Page
• Long-term cooperation

,[Designing and developing abstract interfaces defining contracts for components responsible for hardware emulation and test stimulus generation., Creating consistent abstraction layers used by multiple implementations and product families., Designing immutable configuration models with validation of business and technical rules at the object creation stage., Defining extensible architectural patterns supporting the development of the test framework., Combining interfaces based on multiple inheritance while maintaining correct architectural structure, metaclass compatibility, and unambiguous method resolution order., Designing and implementing mechanisms describing hardware capabilities and individual component characteristics using flags and functionality composition., Developing logic for filtering and selecting implementations based on available functions and device characteristics., Creating shared contract tests verifying the compliance of all implementations with interface requirements., Developing unit, integration, and property-based tests., Implementing mechanisms for lazy calculation and caching of costly operations related to hardware state or emulators., Documenting programming contracts, interface behaviors, and principles related to caching and multithreaded safety., Collaborating with the team responsible for developing the test environment for embedded systems.] Requirements: Python, pytest, Testing Additionally: Private healthcare.