Senior Full-Stack Engineer for Claude-Based CRM & Websites

via Freelancer ·

Budget / Salary₹1,500–12,500
TypeFreelance project
LocationRemote
Posted1 hour ago
**Title: Seeking a Senior Full-Stack Engineer to Review and Secure Our Claude-Built CRM & Websites**

We're looking for an experienced full-stack engineer to review, test, and improve an existing CRM and multiple websites developed with Claude Code.

The code is largely prepared, and we want an experienced engineer to help us identify issues, validate the architecture, and ensure the applications are reliable and secure before production deployment.

**Scope of work:**
- Review the existing codebase, architecture, and database design.
- Identify bugs, security vulnerabilities, and architectural weaknesses.
- Audit authentication and role-based access controls.
- Validate privacy and data isolation between owners, admins, agents, callers, and sub-agents.
- Review API endpoints, database queries, input validation, and error handling.
- Check lead creation, updates, status tracking, and data integrity.
- Review external integrations, including TrustedForm and lead-processing workflows.
- Help fix critical issues and establish maintainable coding practices.
- Guide us in using Claude Code effectively for future development.

**Requirements:**
- Strong full-stack development experience.
- Experience with authentication, authorization, APIs, databases, and application security.
- Experience reviewing production applications, not just building prototypes.
- Comfortable working with AI-generated code and collaborating with Claude Code.
- Able to explain findings, prioritize risks, and implement practical fixes.

**Engagement:** Initial code audit and remediation, with potential for ongoing part-time collaboration.

Please share your technical background, examples of relevant projects, and how you would approach reviewing an existing AI-built application.

We're looking for a senior engineer who can validate the work, challenge weak assumptions, and help us ship confidently.
software testing web development full stack development database design api development software engineering claude code security auditing
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