Senior Test Engineer with Rust

📣 Would you like to join a company that puts people at the heart of its concerns? We are waiting for you! Since 2007, Extia, an IT consulting company, has been offering a unique approach in its field by combining well-being at work and performance.

Our philosophy at Extia is “First who, then what", so let's go for it!

🚀First who?

• Meticulous and analytical, you have a sharp eye for detail and a systematic approach to problem-solving.
• You hold a strong sense of responsibility, with a strict commitment to confidentiality and compliance.
• You are fluent in both spoken and written English, possessing excellent communication skills for test code, documentation, and reviews.
• You are disciplined in your workflow, willing to work exclusively within provided tools and environments.

This role is remote. The candidate needs to have Romanian citizenship.

🚀Then what?

Senior Test Engineer with Rust, with the following tasks:

• Take responsibility for integration, negative, and robustness testing of developed modules, verifying them against specifications and archetype assurances.
• Derive complete test specifications from module requirements and underlying format standards.
• Set up and maintain automated integration tests for each functional requirement.
• Conduct systematic negative tests against erroneous and malicious inputs.
• Verify archetype assurances, specifically ensuring matchers pass data unchanged and rejection responses do not leak original payload data.
• Ensure full traceability from requirement through test case to result.
• Create reproducible error reports and track them until resolution.

Required technical skills:

• Min. 5 years of testing experience, including at least 2 years writing test code in Rust or Python.
• Proficiency in test design methods: equivalence classes, boundary values, decision tables, and state-based testing.
• Expertise in generating structured test data, including at the byte level and intentionally outside format boundaries.
• Protocol testing experience: building custom clients, analyzing recordings, and verifying behavior during connection drops/timeouts.
• Experience with test execution as a stage in a CI pipeline and traceability tracking tools.

Nice to have:

• Ability to perform differential testing and property-based testing (e.g., with proptest).
• Ability to read Rust safely to evaluate module code and developer tests.
• Experience with binary protocols, Protocol Buffers, test environments as code, and containerization.
• Load and performance testing experience, and evaluation of module metrics.
• Previous experience working in regulated environments where test evidence is used for regulatory compliance.

🚀 Do you recognize yourself in the "Who" and represent the "What"? Apply and let's talk!