Freelancer profile translated to English.

Description

I code and sell CRO audits. My rare hybrid: calibrated Messaging consultant (CXL/Nielsen Norman/MECLABS) + senior fullstack dev (NestJS/Next.js/TypeScript).

I deliver diagnosis + implementation in 14-21 days where a traditional consultant takes 3 months. Diagnosis AND implementation by the same person — no going back and forth between consultant and dev.

Technical Stack:

NestJS hexagonal · Next.js 16 · React 19 · TypeScript · Tailwind v4 · Shopify Polaris · Microsoft Clarity API · Sonnet 4.6 · Anthropic Claude Code

Proprietary Tool:

AudySpark (audyspark.com) — a 12-dimension messaging framework that delivers a CRO audit in 5 minutes at the level of a senior consultant. Calibrated on 30+ scientific anchors (CXL Institute, Nielsen Norman Group, MECLABS Institute, Baymard Institute).

My 2 SaaS products in production:

- AudySpark — automated CRO diagnosis for B2B SaaS founders

- RecoverlyAI — intelligent Shopify cart recovery, 38+ languages

Available for:

- CRO Messaging Audit + actionable roadmap (14 days)

- Multi-page Funnel Mission with Microsoft Clarity behavioral analysis (21 days)

- A/B testing and conversion optimization implementation

- Fullstack NestJS/Next.js development with a conversion-first angle

- B2B SaaS / e-commerce funnel redesign

- CRO agency overflow clients

- LLM-augmented missions (Claude API integration, agentic workflows, anti-hallucination frameworks)

Portfolio demo: portfolio-khalifa.onrender.com

Professional Contact:

Languages

French
Native or bilingual
English
Fluent

Workplace preferences

Can work on-site

Paris (up to 50km)

AudySpark
Founder & CRO Consultant AudySpark
DIGITAL AND IT
September 2025 - Today (11 months)
Paris, France
I built AudySpark, a CRO diagnostic tool calibrated on the reference frameworks of the top 1% of CRO consultants (CXL Institute, Nielsen Norman Group, MECLABS, Baymard Institute).

The tool delivers a 12-point messaging audit in 5 minutes that usually takes 5-10 days in traditional consulting.

Stack: NestJS 11 (hexagonal architecture) · Next.js 16 · React 19 · TypeScript · Sonnet 4.6 · Microsoft Clarity API · Firecrawl · Playwright

Client Missions:
- Single-page Messaging Audit — 14 days
- Multi-page Funnel Mission with behavioral data — 21 days
- Direct implementation of recommendations
Typescript Next.js NestJs CRO Conversion Funnel Optimization
RecoverlyAI — SaaS Shopify
Founder & Solo Developer
E-COMMERCE
January 2025 - January 2026 (1 year)
Paris, France
— NestJS 11 Architecture + Next.js 15 + Supabase + BullMQ + Redis — Claude API Integration • fallback GPT-4o • Gemini — Intelligent Scoring (0–100) to select high-potential carts — AI Multilingual Emails: 30+ languages, auto-detection, 6 writing styles — Production Security: OAuth 2.0 + PKCE, AES-256-GCM encryption, HMAC webhook validation, triple-layer billing enforcement, 4-level AI guardrails, GDPR cascade hard-delete, rate limiting — Shopify Billing and Subscriptions — Free / Starter / Pro plan system — 1,833 tests • 142 suites • Strict TypeScript • production-ready architecture
Stripe Billing BullMQ artificial intelligence IT Security Workflow
Vir by JP CDI
Fullstack Developer
January 2023 - January 2025 (2 years)
Paris, France
— Enterprise Angular Application • C# / ASP.NET ◦ · SQL Server — Feature development, REST API integration — Application Security: authentication, permissions management, code audit — Scrum Sprints — planning, review, technical design — CI/CD • Git • Docker • Technical documentation