Gravity Talent Portal · System Architecture

See data model →

Client
Middleware
Auth
Routers
Controllers
Services
Data / External

Client

Frontend portals

Candidate Frontend
HR Portal
Business Portal
Campus Portal

Express App

Node 22 + Express

Middleware Stack

Body Parser
CORS
Compression
Passport Init
Security Headers

Auth Layer

authMiddleware — JWT verify
validate — Zod schemas
devskillerAuth
Passport JWT
Passport Google OAuth

API Routers

24 mounted routers

/auth/google/public-profile/candidates/candidate-invite/jobs/job-applications/jobroles/skills/file/partners/businesses/devskiller/interviewers/users/backup/campuses/company/organizations/institutions/projects/languages/dashboard/certifications

Controllers

AuthController
CandidateController
JobApplicationController
UserController
FileController
CandidateInviteController

Services

CalendarSyncService
CandidateEvaluationService (Gemini)
GmailService
CV Parser (aiTaskRunners)
Cron — databaseBackup

MongoDB

Mongoose ODM

AWS S3

File storage

Gemini API

gemini-2.5-flash

Google APIs

Calendar, Gmail, OAuth

Devskiller

Assessments + webhooks

OAuth + sourcing

Nodemailer / Resend

React Flow