Freelancer profile translated to English.

Description

Hello! I am a Senior Backend Developer specializing in PHP / Symfony, with over 5 years of experience on high-load platforms and complex architectures.

My expertise has been built within the ticketing and e-commerce ecosystem, where I have designed and evolved critical subsystems: global payment infrastructures, secure checkout funnels, and financial logic automation.

💼 My areas of expertise:

**Development & Architecture**: Designing robust applications with PHP 8+ and Symfony, migrating legacy systems, asynchronous and event-driven architecture (AWS SQS).
**Fintech & APIs**: Integrating international payment gateways (Adyen, Wallee, Chargebee, Stripe) and complex split-payment logic.
**Performance & Data**: Optimizing MySQL queries, production monitoring (Sentry, CloudWatch), and setting up high-throughput data pipelines (BigQuery).
**Quality & DevOps**: Automating deployments (CI/CD), test coverage (unit/integration), and rigorous code reviews.

👨‍💻 My approach:

I enjoy understanding systems in their entirety. I always favor simple, clean, and maintainable solutions over complex Rube Goldberg machines. Solution-oriented and accustomed to teamwork (including leadership/mentoring), I ensure that every line of code brings real business and technical value.

Let's discuss your needs and how I can help you scale your product!

Industry field of expertise

Languages

French
Fluent
English
Fluent
Arabic
Native or bilingual

Workplace preferences

Remote only

Primarily works remotely

Smeetz
Backend Developer
TRAVEL AND TOURISM
August 2021 - Today (5 years)
Lausanne, Switzerland
**Backend & Scalability**: Development of PHP/Symfony services for a high-traffic ticketing platform. Optimization of a database managing over 20 million ticket statuses.
**Fintech & Payments**: Integration and maintenance of Adyen and Wallee gateways. Management of secure payment flows and split payment logic (+5,000 transactions/refunds per day).
**Financial Subsystems**: Architecture of accounting modules, dynamic pricing (taxes/products), and flux reconciliation via the Chargebee API.
**AWS & Data Architecture**: Implementation of asynchronous event-driven workflows with AWS SQS (+100k events/day). Design of high-throughput data pipelines to BigQuery for real-time reporting.
**Performance & Reliability**: Application profiling and bottleneck resolution via AWS CloudWatch and Sentry. Optimization of complex MySQL queries.
**Code Quality & CI/CD**: Implementation of unit/integration tests, reduction of regressions, and secure deployments. Rigorous code reviews and automation via CI/CD pipelines.
**Mentoring & AI**: Lead on technical onboarding for new developers. Use of AI tools (Cursor, Claude) to accelerate refactoring and halve time-to-market while ensuring high standards.
Symfony PHP Amazon Web Services SQL Payments
Idhtours.com
Full Stack Developer
TRAVEL AND TOURISM
November 2018 - May 2021 (2 years and 6 months)
Tizi-Ouzou, Algeria
Development and evolution of backend systems dedicated to tourism and booking with PHP/Symfony. Integration of high-traffic international APIs (Expedia, Booking.com, HotelBeds, W2M, GoGlobal) as well as secure multi-currency payment solutions with Ingenico. Optimization of application performance, redesign of existing features, and improvement of user experience through responsive interfaces. Collaboration with business and technical teams on projects with strong business logic.
PHP Symfony HTML5 JavaScript CSS3
Freelance
Full-stack web developer
January 2021 - May 2024 (3 years and 4 months)
Tizi Ouzou, Algeria
Development of custom web projects for international clients via Fiverr: booking platforms, car management systems, administrative dashboards, and review platforms. Full development of applications with Symfony/PHP, payment integration, performance optimization, and cloud deployment. End-to-end project management, from needs analysis to production.
Symfony PHP Laravel

Be the first to recommend Hamza

Help this freelancer shine by sharing your experience working together.

Agatha Frydrych

Backend Java Software Engineer

4.7

(3)

Baptiste Duhen

Fullstack developer

4.6

(4)

Amed Hamou

Senior Lead Developer

(2)

Audrey Champion

Web developer

4.3

(3)

Signup to reveal

Master in Computer Engineering
University of Boumerdès (IGEE)
2018

Hamza K.

Web Developer | PHP | Laravel | Symfony

About Hamza

💼 My areas of expertise:

👨‍💻 My approach:

Experience

Recommendations

These freelancer profiles also match your criteria

Education

Skill set

Categories