Prompt engineering
Show where Prompt engineering affected a real decision in the project. Include the implementation, constraint, test or measurement that makes the skill verifiable.
CAREER PROJECT · Intermediate · 1 weekend
Prompt Regression Test Suite
Create versioned prompts, test cases and automated quality/cost regression checks.
Prompt engineeringEvaluationCIMetricsLLM APIs
WHAT THIS PROJECT PROVES
Make the engineering visible.
This brief is designed as portfolio evidence for a AI Engineer path. The goal is not to claim a hiring outcome; it is to make your implementation, judgment and tradeoffs easier to inspect.
Evaluation
Show where Evaluation affected a real decision in the project. Include the implementation, constraint, test or measurement that makes the skill verifiable.
CI
Show where CI affected a real decision in the project. Include the implementation, constraint, test or measurement that makes the skill verifiable.
Metrics
Show where Metrics affected a real decision in the project. Include the implementation, constraint, test or measurement that makes the skill verifiable.
LLM APIs
Show where LLM APIs affected a real decision in the project. Include the implementation, constraint, test or measurement that makes the skill verifiable.
BUILD PLAN
Finish the core before expanding the scope.
Use this as a project sequence, not a rigid tutorial. Your stack can change; the evidence should still show what you built, why you built it that way and how you know it works.
Define the scope and success criteria
Turn the brief into a small finishable system. Decide what the core Prompt Regression Test Suite must do, what you will deliberately leave out, and how you will show that it works.
Build the core workflow
Create versioned prompts, test cases and automated quality/cost regression checks. Keep the first pass focused on the main user or system flow before adding stretch features.
Add engineering proof
Create eval cases and ci check. Document the decisions, failure states, tests, performance, security or operational tradeoffs that matter for this project.
Ship and package the evidence
Publish the strongest artifacts, including versioned prompts, quality report, cost baseline. Make it easy for a reviewer to understand the problem, architecture, tradeoffs and what you personally implemented.
PORTFOLIO PROOF CHECKLIST
Leave artifacts a reviewer can inspect.
A strong project page should make it possible to understand the system without guessing what you personally built.
01
Eval cases
02
CI check
03
Versioned prompts
04
Quality report
05
Cost baseline
06
A concise README explaining the problem, architecture and tradeoffs
07
A working demo, API example or reproducible run path
08
Evidence of testing, monitoring, performance, accessibility or reliability where relevant
RESUME / PORTFOLIO FRAMING
Describe what you actually did.
Created an automated prompt regression suite that tracks quality, latency and cost across prompt changes.
Use this as a starting structure, then replace it with your real implementation details, metrics and constraints. Do not claim outcomes you did not measure.
INTERVIEW TALKING POINTS
Be ready to defend the decisions.
These prompts turn the project from a repository link into a technical conversation about judgment, tradeoffs and evidence.
Why did you choose your approach to Prompt engineering, and what alternative did you reject?
Answer with details from your implementation. Prefer concrete constraints, measurements and alternatives over generic best practices.
Where could Prompt Regression Test Suite fail under real usage, and how would you detect or recover from that failure?
Answer with details from your implementation. Prefer concrete constraints, measurements and alternatives over generic best practices.
How did Evaluation affect the rest of the design?
Answer with details from your implementation. Prefer concrete constraints, measurements and alternatives over generic best practices.
What did you measure or test to prove LLM APIs instead of only claiming it?
Answer with details from your implementation. Prefer concrete constraints, measurements and alternatives over generic best practices.
If you had one more week, what would you improve first and why?
Answer with details from your implementation. Prefer concrete constraints, measurements and alternatives over generic best practices.
STRETCH GOALS
Go deeper only after the core is solid.
Model routing
Add it only if it strengthens the engineering story instead of delaying a finished, deployable core.
Judge calibration
Add it only if it strengthens the engineering story instead of delaying a finished, deployable core.
Dashboard
Add it only if it strengthens the engineering story instead of delaying a finished, deployable core.
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