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Senior Systems Engineer

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Your name Email address Portfolio or profile URL (optional) Relevant experience

A few sentences about your skills, projects, and contribution, up to 3,000 characters. Leave out private customer or employer information.

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Five questionsNo time limit

01 / Role knowledgeAn order API times out after the server may have accepted the order. What makes a retry safe? Send a new order identifier with every retry. Use a stable idempotency key and check the existing result. Retry immediately until a response arrives. Increase the browser timeout only.

02 / Role knowledgeTwo database changes must either both succeed or both be undone. What should contain them? Two independent connections. A longer cache lifetime. A database transaction with rollback on failure. Two requests sent at the same time.

03 / Role knowledgeA search endpoint accepts user input. Which approach addresses SQL injection? Use parameterized queries with bound values. Remove spaces from the input. Hide the database error messages only. Validate the field only in browser JavaScript.

04 / Practical judgmentA teammate hands you work with an important assumption undocumented. What would you do first? Ask about the assumption and record the decision before relying on it. Proceed with your best guess to keep momentum. Return the entire task without explaining the gap. Rewrite the work before speaking with the teammate.

05 / A brief example from your workDescribe a system you built, stabilized, or improved. What was your contribution, what risk did you address, and how did you check the result? A few sentences, up to 2,500 characters. Leave out private customer or employer information.

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