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Description

Is your SaaS running slow? Is your legacy code becoming unmanageable? Is technical debt blocking your team?

I will take over the backend architecture, optimize performance, and modernize the code.

Result: a solid foundation for scaling with confidence.

MY EXPERTISE:

Solid Architecture (DDD, CQRS, Hexagonal)

Performance and Scalability (Redis, RabbitMQ, async)

Technical Refactoring (legacy to modern)

Artificial Intelligence Integration

TANGIBLE RESULTS:

- FoodoMarket (B2B food platform):

DDD/CQRS hexagonal architecture refactoring
Performance: -40% response time (300ms → 180ms)
Team Velocity: +20% with optimized review process
AI: automatic invoice analysis + product recommendations

- Tekyn (Textile production SaaS):

Real-time production traceability REST API
Automatic stock synchronization (Airtable)
Prototype tracking with complete history
Progressive refactoring from legacy to Clean Architecture

TECHNICAL STACK:

Backend: PHP 7/8, Symfony 3 to 7, API Platform, Doctrine

Architecture: DDD, CQRS, Hexagonal, Event-Driven

Data: MySQL, Redis, RabbitMQ, Elasticsearch

AI: OpenAI, Vertex AI

DevOps: Docker, CI/CD, PHPUnit, PHPStan level 9, Git

Frontend: React, React Native, TypeScript

MY APPROACH:

Simple and maintainable code (KISS, SOLID)

Systematic automated testing

Clear documentation

Continuous process improvement

Transparent communication with product owners

UNUSUAL PROFILE:

Career change after 10 years in sales/marketing at Ooredoo Telecom. This dual technical/business skill set allows me to quickly understand business challenges and propose pragmatic solutions.

DEMO CODE:

See my architecture and code → github.com/seifo83/CoffeeMachine

DDD/CQRS/Event Sourcing, real-time (Mercure), async workers (RabbitMQ), PHPStan level 9, tests, Docker

AVAILABILITY:

Immediate • Remote or Paris

Team reinforcement, technical refactoring, long-term mission

Industry field of expertise

Languages

French
Fluent
English
Conversational
Arabic
Native or bilingual

Workplace preferences

Can work on-site

Paris (up to 40km), Lyon (up to 20km), Nantes (up to 20km), Marseille (up to 20km), Bordeaux (up to 20km)

Entreprise FoodoMarket
Fullstack Developer
RESTAURANTS AND FOOD SERVICE
July 2024 - January 2026 (1 year and 6 months)
Paris, France
Backend development on a B2B SaaS platform connecting local restaurateurs and producers.

CONTEXT
Joined as one of the first developers on a platform with legacy code. Participated in a technical refactoring based on a hexagonal architecture (DDD, CQRS).

PROCESS IMPROVEMENTS
- Implemented a common working framework (from ticket to production)
- Optimized validation process (code review): reduced delays from 3 days to 1.5 days (-50%)
- Improved team velocity by 20%
- Transitioned to daily deliveries

KEY PROJECTS

ShoppingXP - Performance & Customer Experience
- Optimized API performance with Redis cache (response time: 300ms → 180ms)
- Developed a multi-format import system (PDF, Excel, CSV)
- Integrated behavioral analysis tools (Segment, Amplitude)

Value - AI for cost reduction
- Integrated Vertex AI (Google Cloud) for automatic data extraction from invoices
- Developed a validation system to secure data
- Implemented an OpenAI algorithm for analysis and recommendation of alternative products
- Contributed to semantic search via a vector database

IMPACT
Time and cost savings for restaurateurs. Smooth daily deliveries.
Domain Driven Design CQRS Artificial Intelligence (AI) Redis Events
Entreprise Tekyn
Fullstack Developer
FASHION AND COSMETICS
April 2020 - June 2024 (4 years and 2 months)
Saint-Denis, France
Backend development on a SaaS platform for on-demand textile production digitalization.

CONTEXT
Startup offering a made-to-order production model connecting brands and garment workshops, with production tracking automation.

DEVELOPED BUSINESS FEATURES

Production Traceability
- Developed a REST API for a mobile application generating package labels with QR codes
- Identified content: number of pieces, materials used, progress status
- Enhanced traceability and simplified production management

Data Synchronization
- Automated stock synchronization between the platform and Airtable via API
- Automatic creation of supplies and stock updates every 20 minutes (cron job)
- Real-time visibility for sales teams and brands

Textile Prototype Tracking
- Designed a module for tracking the lifecycle of prototypes (Fit Sample, Size Set, PPS)
- Dynamic visualization of statuses and complete validation history
- Strengthened quality traceability

TECHNICAL REFACTORING
- Maintenance and refactoring of a legacy project
- Development of a new platform in Clean Architecture inspired by DDD
- Development of REST APIs and internal business tools

QUALITY & DEVOPS
- Implementation of unit and functional tests (PHPUnit)
- Automated deployment via CI/CD pipeline
- Integration of an internationalization system

IMPACT
Reduced stock costs and ecological impact for brands.
REST APIs TDD Clean Architecture Doctrine docker-compose

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Web and Mobile Developer Bachelor's Degree +2 (Level 2 RNCP)
DORANCO École Supérieure des Technologies
2020
Développeur Web et Mobile Bac + 2 (RNCP de niveau 2)
Computer Science Bachelor's Degree (Level 2 RNCP)
Université Paris 8
2017
Licence Informatique (RNCP de niveau 2)

Check out Seifallah's education

Seifallah Beldi

Senior PHP/Symfony SaaS Refactoring B2B DDD/CQRS | AI

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