Technical Vetting for Staff Augmentation: Beyond Coding Tests

Hiring augmented developers is different from hiring full-time employees. You're not looking for culture fit over five years — you need someone productive from Day 1, able to work autonomously, and integrate into an existing codebase without breaking things. LeetCode-style algorithm tests don't predict this. You need to assess real-world skills: code reading, debugging, collaboration, and architectural judgment.

This guide covers a practical vetting process for staff augmentation: what to test, how to test it, and red flags to watch for.

What Actually Matters for Augmented Developers

Skill	Why It Matters	How to Test
Code Reading	80% of work is reading existing code	Show them your codebase, ask them to explain a module
Debugging	Production bugs happen daily	Present a buggy function, watch them debug
Code Review Skills	They'll review teammates' PRs	Give them a PR to review, see what they catch
Communication	Remote work = async explanations	Ask them to explain a technical decision in writing
Autonomy	You can't handhold daily	Give a vague task, see if they ask clarifying questions
Architectural Judgment	Senior devs make design decisions	Ask "How would you build X?" — listen for trade-off thinking

What Doesn't Matter:

• Solving binary tree problems in 15 minutes
• Memorizing framework APIs (they'll Google it)
• Whiteboard coding (no one codes on whiteboards in real work)

The 4-Stage Vetting Process

Stage 1: Resume Screen (5 minutes)

What to Look For:

• Relevant tech stack (React if you use React)
• Years of experience (3+ for mid-level, 5+ for senior)
• Past projects similar to your domain (SaaS, e-commerce, fintech)
• GitHub/portfolio links (public code to review)

Red Flags:

• Job-hopping (6-month stints)
• Vague descriptions ("worked on frontend" — doing what?)
• No demonstrable work (no GitHub, no portfolio)

Stage 2: Technical Phone Screen (30 minutes)

Format: Conversational, No Live Coding

Questions to Ask:

1. "Walk me through a recent project you're proud of."
   Listen for: technical depth, what they contributed vs team, challenges faced.
2. "What was the hardest bug you debugged recently?"
   Listen for: debugging process, tools used, how they communicated the fix.
3. "How do you handle unclear requirements?"
   Listen for: asking questions, documenting assumptions, iterating.
4. "Describe a time you disagreed with a technical decision."
   Listen for: ability to advocate, respect for others, trade-off thinking.

Goal: Filter out clearly unqualified candidates. Advance 50% to next stage.

Stage 3: Practical Assessment (90 minutes, take-home or live)

Option A: Take-Home Project (Preferred)

Sample Task:

"Build a simple todo app with React + Node.js backend. Requirements:
- Add, edit, delete todos
- Mark as complete
- Persist to database (SQLite is fine)
- Write tests for at least one feature
- Include a README explaining your approach"

What You're Assessing:

• Code quality (clean, readable, not over-engineered)
• Test coverage (do they test at all?)
• Documentation (can they explain their code?)
• Attention to requirements (did they build what was asked?)

Time Limit: 2-4 hours. Respect their time.

Option B: Live Pair Programming (60-90 minutes)

Sample Task:

"Here's a buggy function that fetches user data. It's timing out. Debug it together."

// Buggy code:
async function fetchUsers() {
  const users = [];
  for (const id of userIds) {
    const user = await fetch(`/api/users/${id}`); // N+1 query problem
    users.push(user);
  }
  return users;
}

What You're Observing:

• Do they recognize the N+1 query issue?
• How do they debug (console.logs, debugger, network tab)?
• Can they articulate the fix (batch request)?
• Do they communicate their thought process?

Stage 4: Code Review Test (30 minutes)

Give them a PR from your actual codebase (anonymized).

Sample PR: "Add user authentication endpoint"

What They Should Catch:

• Security: Password stored as plaintext (should be hashed)
• Error handling: No try/catch around DB query
• Edge cases: What if email is missing?
• Naming: Variable `x` is unclear
• Tests: No test coverage

Scoring:

• Great: Catches 4+ issues, suggests fixes constructively
• Good: Catches 2-3 issues
• Poor: Approves without comments or nitpicks formatting only

Red Flags to Watch For

Red Flag	What It Signals
Can't explain past work	Didn't actually do it (resume fraud) or shallow involvement
Blames others for bugs	Lacks ownership, poor team player
Gives one-word answers	Poor communication (critical for remote work)
Over-engineers simple tasks	Will add unnecessary complexity to your codebase
Can't handle ambiguity	Needs constant handholding (expensive for you)
Defensive about feedback	Hard to work with, won't improve

Green Flags (Hire Immediately)

Green Flag	What It Signals
Asks clarifying questions	Thinks before coding, avoids assumptions
Mentions trade-offs	Architectural maturity ("Option A is faster, Option B scales better")
References docs/Google mid-task	Resourceful, doesn't pretend to know everything
Writes tests unprompted	Quality-conscious, won't break production
Explains code clearly	Will write maintainable code, good for team knowledge transfer
Open to feedback	Coachable, collaborative

Assessing Cultural Fit for Remote Work

Key Question: "Describe your ideal work environment."

Good Answers:

• "I prefer async communication so I can focus deeply."
• "I like autonomy but appreciate regular check-ins."
• "I document my work so teammates can catch up."

Bad Answers:

• "I need constant feedback." (High maintenance)
• "I don't like writing things down." (Poor for remote)
• "I work best in an office." (Won't thrive remote)

The 2-Week Trial Period

Even with great vetting, hire on a 2-week trial (paid) before committing long-term.

Trial Goals:

• Ship one small feature end-to-end
• Participate in code reviews
• Communicate async effectively
• Integrate with team (standups, Slack)

Evaluation Criteria:

• ✅ Delivered feature on time, with quality
• ✅ Asked questions when stuck (didn't ghost)
• ✅ Code review feedback was constructive
• ✅ Team enjoys working with them

If 3/4 are "yes", extend. If 1-2, give feedback and reassess. If 0, part ways.

FAQs

Should I include algorithm/data structure questions?

Only if the role requires it (e.g., building a search engine). For 90% of web dev roles, skip it. Test real-world skills instead.

How long should the entire vetting process take?

1-2 weeks from first contact to offer. Staff aug is time-sensitive; candidates won't wait a month.

Should I pay candidates for take-home projects?

If the project takes >4 hours, yes ($100-200). Otherwise, clearly state time limit (2-3 hours) and respect it.

What if a candidate passes coding but fails code review test?

Don't hire. Code review skills = quality gate for your codebase. Poor reviewers let bugs through, slowing the team.

How do I vet for seniority (mid vs senior vs staff)?

Mid: Can implement features independently. Senior: Designs features, mentors juniors, makes architectural decisions. Staff: Influences team direction, balances technical and business needs.