DevSecOps + Full-Stack Security Engineer Needed for SEO Spam Attack

We are facing a critical security incident on our production website, including:
1) SEO spam attack (malicious pages indexed in Google)
2) Daily server crashes due to high CPU usage & abnormal outgoing traffic
3) Backend and admin panel exposed publicly without authentication.
4) Confirmed security vulnerabilities across server, backend, database, and frontend.


We are looking for an experienced DevSecOps Engineer and/or Security-focused Full-Stack Developer to immediately investigate, clean, secure, and harden our infrastructure and application.

This is a high-priority, incident-response style project.

Project Scope & Phases
Phase 1 – Immediate Incident Response

Goal:
Stop attacks, stabilize server, identify breach vectors

Points to be considered -
Assume server is compromised
Forensic-style investigation
No reuse of existing backend code

Add Infrastructure-Level Security
1) Firewall rules (UFW / iptables)
2) Disable unused ports
3) Fail2Ban or equivalent
4) SSH hardening (key-only, no root login)
5) Outgoing traffic restrictions
6) Cron Job Audit
7) File Integrity Scan
8) Recursive Hidden File Detection


Responsibilities:
Full VPS / Server Cleanup
1) Identify and remove malicious files, scripts, cron jobs
2) Kill suspicious processes & outgoing traffic
Log Analysis
1) Server, application, access, and error logs
2) Identify SEO spam injection source
Database Security Audit
1) Check for injected content, malicious records, backdoors
2) Validate access controls and permissions
Frontend Audit
1) Scan for injected routes, hidden pages, malicious scripts
2) Produce a clean production build

Must Include -1) Cron job & scheduled task audit
2) File integrity & hidden file scan
3) Outgoing traffic analysis (identify spam endpoints)
4) Immediate lock-down of admin routes

Deliverables:
1) Clean, stable server
2) Root-cause analysis report
3) Confirmation that SEO spam injection is neutralized

Phase 2 – Backend Rebuild (Handled by Our Developer)

Note:
This phase is not part of the Upwork scope, but your findings must support it.
Complete rebuild of backend services )
Remove old backend folders entirely

Rotate all secrets:
1) JWT_SECRET
2) Database credentials
3) API keys
Secure admin panel with proper authentication & authorization

Phase 3 – Security Hardening & Monitoring (Upwork Scope)

Goal:
Prevent recurrence and restore SEO trust


Responsibilities:
Backend & API Security Hardening
1) Authentication & authorization review
2) Rate limiting, input validation, CORS, headers
Post-Deployment Monitoring
1) CPU, memory, traffic alerts
2) Intrusion detection recommendations
Google Search Console Cleanup
1) Identify fake indexed URLs
2) URL removal requests
3) Sitemap regeneration
4) Manual action check
5) Post-clean reindex request

Contract duration of less than 1 month. with 30 hours per week.

Mandatory skills:
NGINX, Web Development, DevOps, Network Security, Website Security, System Administration, devops security
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