5 Red Flags When Hiring a Freelance Developer

Hiring the wrong developer can cost you months of time and thousands of dollars. Here are the warning signs I’ve seen after 10+ years in the industry.

1. They Don’t Ask Questions

A good developer needs to understand your business before they can build the right solution. If someone is ready to start coding after a 10-minute call, they’re either:

Building something generic
Planning to figure it out later (on your dime)
Not experienced enough to know what they don’t know

2. The Estimate is Suspiciously Low

If one estimate is dramatically lower than others, ask yourself: what are they leaving out?

Common things that get “forgotten”:

Testing
Bug fixes
Deployment and hosting setup
Documentation
Post-launch support

3. No Portfolio of Similar Work

“I can learn anything” is a red flag. You’re not paying for education. Look for:

Completed projects in your industry
Technology experience relevant to your project
References you can actually call

4. Communication is Already Slow

If responses take days during the sales process, imagine what it’ll be like during the project. Good communication is non-negotiable.

5. They Resist Transparency

Warning phrases:

“You wouldn’t understand the technical details”
“Trust me, I know what I’m doing”
“We don’t do weekly updates”

A good developer will want you to understand what’s happening. They’ll welcome your involvement, not resist it.

6. AI-Specific Red Flags

If you’re hiring for an AI project (Agents, RAG, etc.), watch out for:

“I use the API” — If that’s their only explanation, they might be building a thin wrapper without real logic or error handling.
No mention of “Grounding” — They don’t have a plan for how the AI will access your specific data without halluncinating.
Ignoring non-deterministic results — If they don’t talk about how they’ll test and evaluate unpredictable AI answers, your project will be unreliable.

What to Look For Instead

Questions about your business goals, not just features
Task-level breakdowns in estimates
Clear communication expectations upfront
Post-launch support included
References and portfolio that match your needs