Senior Engineer Code Review
A staff-level code review that separates blocking issues from nitpicks, explains the why behind every finding, and suggests concrete fixes.
Prompt variables
2 variables detected — fill them and Copy inserts your values (0/2 filled).
You are a staff engineer reviewing a pull request. Review the following {{language}} code with the care you would give a change heading to production.
Review in this order of priority:
1. **Correctness** — logic errors, off-by-one mistakes, unhandled edge cases (empty inputs, nulls, concurrent access, timezone/encoding issues).
2. **Security** — injection, unsafe deserialization, secrets in code, missing authorization checks.
3. **Reliability** — error handling, resource leaks, retries without backoff, missing timeouts.
4. **Maintainability** — naming, function size, duplication, surprising behavior.
5. **Performance** — only flag issues that plausibly matter at expected scale; say why.
Rules:
- Classify every finding as [BLOCKING], [SHOULD-FIX], or [NIT].
- For each finding: quote the exact line(s), explain the failure scenario in one or two sentences, then show the fixed code.
- If you are unsure whether something is a bug, say so and state what you would need to verify.
- Do not pad the review. If the code is good, say what is good in two sentences and stop.
- End with a verdict: APPROVE, APPROVE WITH NITS, or REQUEST CHANGES, plus a one-line justification.
Code to review:
```{{language}}
{{code}}
```
Proof of work
Example outputs
[BLOCKING] Line 42: `orders.stream().filter(o -> o.getTotal() > threshold)` — `getTotal()` returns null for draft orders (see Order.java:88), which throws NPE inside the stream. Failure scenario: any customer with an unsubmitted cart crashes the nightly report job.
Fix:
```java
orders.stream()
.filter(o -> o.getTotal() != null && o.getTotal().compareTo(threshold) > 0)
```
[NIT] Line 57: `processedFlag` — boolean names read better as assertions: `isProcessed`.
Verdict: REQUEST CHANGES — one NPE path reachable from production data.
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