You've shortlisted three contract developers. Their resumes look solid. Their hourly rates are reasonable. Now comes the moment that separates confident hiring managers from ones who end up rewriting bad code six weeks into a project: evaluation.
Unlike a full-time hire where cultural fit and long-term potential carry real weight, a contract engagement is about one thing — can this developer deliver what you need, on time, within the scope you've defined? The evaluation framework is tighter, more technical, and more consequential.
This checklist walks you through every dimension you should assess before signing a contract developer, whether you're filling a two-week gap or staffing a six-month product build.
1. Verify the Fundamentals First
These Are Disqualifiers, Not Differentiators
Before anything else, confirm the basics. If any of these fail, stop the process — regardless of how impressive the portfolio is.
Availability
Availability confirmed for your exact dates and hours, with a minimum 4-hour time zone overlap with your core working hours.
Legal & Compliance
Right to work and contracting legality confirmed in their jurisdiction. No active non-compete covering your industry or tech stack.
Billing Structure
Clear billing model agreed upon — whether hourly, milestone-based, or retainer — before the engagement begins.
2. Assess Technical Depth, Not Just Breadth
Most resumes list 15–20 technologies. Your job is to identify which ones the candidate genuinely commands versus which ones they've touched once in a side project. Start by anchoring the conversation in your actual stack.
Project Walkthrough
Ask them to walk through a recent project that most closely resembles yours and describe the biggest technical challenge they faced.
Trade-Off Thinking
Probe their understanding of trade-offs: "Why did you choose X over Y for this problem?" — and ask about performance, security, or scalability decisions.
Vague Answers
Watch for answers that describe what a technology does rather than how they've actually used it in production.
Missing Specifics
Inability to recall specifics — file sizes, query times, API call volumes — is a strong red flag.
Inflated Expertise
Be cautious of candidates claiming expertise in tools released after their last role ended.
3. Run a Practical Skills Test (Keep It Short and Relevant)
The Most Predictive Evaluation Tool You Have
A 15–30 minute practical test doesn't need to be complex — it needs to reflect the actual work they'll be doing. Evaluate their process, not just their output: do they ask clarifying questions, handle edge cases, and write readable code?
React Developer
A small component with one API call and one stateful interaction.
Backend Engineer
Write an endpoint that handles a basic CRUD operation with validation.
Salesforce Developer
Describe how you'd approach a custom Apex trigger for a given business scenario.
"Avoid tests that take more than an hour. A fair, focused test respects their time and signals that you run a professional engagement.
4. Evaluate Communication and Collaboration Skills
A technically strong developer who communicates poorly can derail a project more thoroughly than a mid-level developer who keeps their team informed. During your interview or screening call, assess the following.
Prompt Responses
Do they reply within 24 hours at every stage of the process? A developer who goes quiet for 48 hours before the contract even starts is a project risk.
Plain-Language Clarity
Can they explain technical decisions clearly to a non-technical stakeholder without defaulting to jargon?
Handling Ambiguity
Ask: "What would you do if requirements changed mid-sprint?" Smart questions about scope — not just pay — signal the right mindset.
5. Review Their Portfolio and Past Deliverables
Strong portfolios for contract developers aren't always public — much of the work may be under NDA. But what you can look for includes GitHub or GitLab commit history, open-source contributions in your stack, and case studies with measurable outcomes.
Code History
Review GitHub or GitLab history — frequency of commits, code quality, and commit messages reveal working habits.
Outcome-Driven Work
Look for case studies that include results: "reduced load time by 40%", "migrated X users to new system".
Code Walkthrough
Ask: "Can you share a piece of code you're proud of and walk me through your decisions?" The ability to articulate their work is as revealing as the work itself.
6. Check References — Ask the Right Questions
Skip Generic. Go Specific.
Reference checks done properly are one of your most valuable inputs. One strong, specific reference from a recent client carries more weight than three generic ones from years ago.
Scope & Ownership
"What was the specific project, and what did [name] own within it?"
Delivery Record
"Did they deliver on time and within scope? If not, what happened?"
Handling Feedback
"How did they handle feedback or technical disagreement?"
Rehire Signal
"Would you hire them again for a similar engagement?" — if the answer is hesitant, ask why.
7. Clarify Contract Terms Before You're Impressed
It's easy to get excited about a candidate's technical ability and gloss over contract specifics. Don't. These terms protect your project and your budget. Platforms like CompanyBench build standard terms into their contracts to reduce back-and-forth — but reviewing them is still your responsibility.
IP Ownership
Who owns the code once it's delivered? Ensure ownership is clearly assigned to your company post-delivery.
Confidentiality (NDA)
An NDA should be signed or agreed upon before granting access to any proprietary systems or data.
Revision & Termination Terms
Confirm the revision policy, notice period for termination, and whether the rate is fixed or subject to change.
Your Pre-Signature Checklist at a Glance
✓ Availability & Time Zone
Minimum 4-hour overlap with your core hours confirmed.
✓ Legal & Billing Clarity
Right to work, billing model, and rate confirmed before engagement.
✓ Stack-Specific Depth
Can articulate decisions, trade-offs, and real project specifics.
✓ Practical Test Passed
Completed a relevant, scoped skills test with clear explanations.
✓ Portfolio Reviewed
Includes outcomes-driven examples, not just technology lists.
✓ Responsive Communication
Replied within 24 hours at every stage; asks clarifying questions.
✓ Clear Verbal Explanation
Can explain technical decisions to non-technical stakeholders.
✓ References Checked
At least one specific, recent reference with outcome-based responses.
✓ IP Ownership Defined
Code ownership clearly assigned to your company post-delivery.
✓ NDA / Confidentiality
Signed or agreed before access to proprietary systems.
✓ Revision & Termination Terms
Both parties clear on scope, revisions, and exit conditions.
Vague Technical Answers
Can't recall specifics from past projects — file sizes, timelines, volumes.
Slow or Inconsistent Replies
Long gaps in communication before the contract has even started.
Inflated Skill Claims
Claims expertise in tools they can't demonstrate in a practical test.
Final Thought: Hire for the Project, Not the Resume
The best contract developer for your project isn't necessarily the one with the most impressive CV. It's the one whose skills, communication style, and availability align with exactly what your team needs right now.
Using a platform like CompanyBench gives you a pre-vetted shortlist, which eliminates most of the early-stage filtering. But the evaluation framework above — applied consistently — is what takes you from a shortlist to a confident decision.
"Evaluate rigorously. Contract quickly. And let your developers build.
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