40-Point Freelance Developer Evaluation Checklist

Score technical competency, project management skills, and cost transparency across 8 categories to avoid hiring disasters.

Scoring Framework

Rate each criterion 1–5 based on evidence provided. Developers scoring below 3.5 average typically cause budget overruns exceeding 100%. Focus heavily on technical architecture and change management scores.

1
2
3
4
5
1= Does not meet requirements · 5 = Exceeds requirements

Evaluation Criteria

Technical Architecture Competency (25%)Project Management and Scope Control (20%)Code Quality and Documentation (15%)Integration and Third-Party Service Management (15%)Security and Compliance Implementation (10%)Performance and Scalability Planning (5%)Communication and Reference Verification (5%)Ongoing Support and Knowledge Transfer (5%)

Technical Architecture Competency

25% weight

Evaluate ability to design scalable systems, handle edge cases, and implement proper error handling that prevents post-launch emergencies costing $8,000–20,000

Sample Questions

  • Can they explain specific bottlenecks that occur at 500, 5,000, and 50,000 concurrent users with concrete solutions?
  • Do they provide examples of error handling for payment failures, file upload limits, and third-party service outages?
  • Can they demonstrate database optimization strategies and caching implementation using Redis or CloudFlare?
  • Do they show understanding of API rate limiting and graceful degradation when services like Stripe or SendGrid fail?
  • Can they explain security implementation including OAuth 2.0, AES-256 encryption, and OWASP Top 10 compliance?

Project Management and Scope Control

20% weight

Assess ability to provide accurate estimates, manage scope creep, and maintain project timelines to prevent 50–100% budget overruns common in poorly managed freelance projects

Sample Questions

  • Do they provide detailed feature-by-feature cost breakdowns rather than round number estimates?
  • Can they identify the 3 most likely areas for scope creep and explain mitigation strategies?
  • Do they have formal change order processes requiring written approval for changes over 2 hours?
  • Can they demonstrate project tracking using tools like Jira, Asana, or Linear with client visibility?
  • Do they provide realistic timelines accounting for integration complexity and testing phases?

Code Quality and Documentation

15% weight

Evaluate documentation standards and code maintainability to prevent $15,000–40,000 costs when transitioning to new developers

Sample Questions

  • Can they show examples of comprehensive README files, API documentation, and deployment guides?
  • Do they provide database schema diagrams and architecture decision records?
  • Can they demonstrate code commenting standards and unit testing frameworks like Jest or Pytest?
  • Do they use version control best practices with meaningful commit messages and branching strategies?
  • Can they show examples of code reviews and quality assurance processes?

Integration and Third-Party Service Management

15% weight

Assess experience with enterprise integrations and third-party service management to prevent $5,000–12,000 emergency fixes when APIs change or services fail

Sample Questions

  • Can they demonstrate experience with Salesforce, QuickBooks, Shopify APIs including rate limiting and webhook handling?
  • Do they show understanding of API versioning strategies and backward compatibility?
  • Can they explain cost implications of services like AWS Lambda, Stripe processing fees, and SendGrid email costs?
  • Do they have monitoring strategies for third-party service outages using tools like Pingdom or DataDog?
  • Can they provide examples of graceful degradation when integrations fail?

Security and Compliance Implementation

10% weight

Evaluate security knowledge to prevent vulnerabilities that could trigger $5,000–12,000 emergency patches plus regulatory penalties

Sample Questions

  • Can they demonstrate OWASP Top 10 security compliance testing using tools like Burp Suite?
  • Do they show experience with GDPR compliance including data encryption and deletion capabilities?
  • Can they implement proper authentication using OAuth 2.0, JWT tokens, and multi-factor authentication?
  • Do they understand PCI compliance requirements for payment processing applications?
  • Can they show examples of security audit documentation and penetration testing results?

Performance and Scalability Planning

5% weight

Assess understanding of performance optimization to prevent complete rebuilds when applications can't scale beyond initial user base

Sample Questions

  • Can they explain specific database query optimization techniques and indexing strategies?
  • Do they demonstrate CDN implementation and static asset optimization for global performance?
  • Can they show experience with load testing using tools like Artillery or LoadRunner?
  • Do they understand caching strategies at application, database, and CDN levels?
  • Can they demonstrate mobile performance optimization for 3G connections?

Communication and Reference Verification

5% weight

Evaluate communication skills and verify past project success to avoid developers who abandon projects or burn bridges with clients

Sample Questions

  • Do they provide references from 3 recent clients with specific project details and outcomes?
  • Can they demonstrate regular progress reporting and stakeholder communication processes?
  • Do they respond to technical questions with specific examples rather than vague assurances?
  • Can they explain complex technical concepts in business terms for non-technical stakeholders?
  • Do they proactively identify risks and propose solutions rather than waiting for problems to emerge?

Ongoing Support and Knowledge Transfer

5% weight

Assess post-launch support capabilities and knowledge transfer to prevent ongoing dependency costing $200–400/hour for basic questions

Sample Questions

  • Can they provide annual maintenance cost estimates including security updates and dependency management?
  • Do they offer training documentation and video tutorials for client team members?
  • Can they demonstrate monitoring and alerting setup using tools like New Relic or Sentry?
  • Do they provide emergency support procedures and response time commitments?
  • Can they show examples of smooth project handoffs to client teams or other developers?

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