Engineer to audit Existing CRM Codebase (TypeScript/Node/NeonDB)
Description
Job Description
I’m looking for an experienced senior full-stack engineer to review an existing CRM system and provide a clear, structured technical assessment of the current codebase.
This is not a build-from-scratch role. The goal is to audit the existing system, review architecture and implementation choices, and highlight risks, concerns, and improvement opportunities across backend, frontend, and data layers.
Tech Stack
Backend: Node.js, Express, TypeScript
Frontend: TypeScript, Tailwind CSS
Database: NeonDB (PostgreSQL)
System Type: Custom CRM platform
Auth: Mix of public and authenticated endpoints
Scope of Review
You will be asked to review the existing codebase and provide written feedback on:
- Code Structure & Architecture
Project structure and separation of concerns
API design and route organization
Service, controller, and data access patterns
Type safety and TypeScript best practices
- Backend & API Review
Public vs authenticated endpoint design
Validation, error handling, and middleware usage
Security posture of public endpoints
Rate limiting, abuse protection, and access controls
- Frontend Review
Component structure and state management
Tailwind usage and maintainability
Frontend/backend contract consistency
- Database & Data Layer
Schema design and relationships
Query patterns and performance considerations
Data access safety (SQL injection, unsafe queries)
- Security & Reliability
Authentication/authorization design
IDOR, data exposure, and abuse risks
Secrets management and configuration hygiene
Logging, monitoring, and error visibility
Deliverables
A written technical review (bullet-pointed and structured)
Clear identification of high-risk, medium-risk, and low-risk concerns
Practical, actionable recommendations (no theoretical fluff)
Notes on what is good and should remain unchanged
No code changes are required unless specifically discussed.
Ideal Freelancer
5+ years professional full-stack experience
Strong TypeScript + Node.js background
Experience reviewing or auditing existing codebases
Comfortable with PostgreSQL / NeonDB
Strong understanding of API security and CRM-style systems
Clear written communication (this is a review role)
Budget: GBP 1000 (Fixed Price)
Proposals: 24 freelancers have applied