Description

I help companies fix and improve Symfony-based backend systems, especially legacy applications and production environments.

I work on real-world e-commerce platforms where stability, performance, and correct business logic are critical. My focus is on quickly identifying issues, fixing them efficiently, and delivering solutions that work reliably in production.

I have hands-on experience with:

Symfony backend development and maintenance

API integrations (REST & SOAP) and authentication flows

Elasticsearch (FOSElastica) debugging and optimization

Docker-based environments and deployment setups

Complex business logic (payments, orders, product feeds)

Typical projects I handle include:

Fixing backend bugs and production issues

Improving API performance and integrations

Debugging and optimizing Elasticsearch search results

Stabilizing and maintaining legacy Symfony systems

Implementing custom business logic for e-commerce platforms

Languages

English
Native or bilingual
German
Basic

Workplace preferences

Can work on-site

Koblenz (up to 50km)

SIO AG
Backend Engineer
E-COMMERCE
March 2023 - Today (3 years and 3 months)
Koblenz, Germany
I am a backend developer with strong experience in Symfony, working on complex e-commerce systems with high data flow and production-level requirements.

My daily work involves maintaining and improving legacy systems, migrating authentication flows (OAuth to Guard/JWT), and solving critical backend issues in live environments.

I have hands-on experience with Docker-based infrastructures, API integrations (REST & SOAP), and search optimization using Elasticsearch (FOSElastica).

I regularly work on debugging production issues, improving performance, and implementing business logic such as payment rules, product feeds, and order processing workflows.

Key skills:

Symfony, PHP
API development & integrations (REST, SOAP)
Elasticsearch / FOSElastica
Docker & Linux environments
MySQL / MongoDB
E-commerce systems & backend logic

I focus on delivering reliable, production-ready solutions and quickly identifying the root cause of complex issues.
Symfony Linux API REST MySQL MongoDB
CT Dent
Web Engineer
E-COMMERCE
March 2020 - July 2022 (2 years and 4 months)
London, United Kingdom
Designed and developed Back-end structure. (Symfony).
• Front-end structuring, designing and development (Twig, Bootstrap 4, Ajax , Jquery).
• Designed Database using ORM (Doctrine).
• Data manipulation (DQL, MySql).
• Evaluate and implement new programming languages and technologies. Provide life-cycle management for software and code.
• Maintain the CI/CD pipeline
MySQL Database Management (e.g., SQL, NoSQL) CI/CD Management Symfony PHP

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Masters in Web and Data Science
University of Koblenz
2026
The curriculum is structured around core domains: 1. Web Science Web engineering & architecture Social networks and user behavior Structure and evolution of the web 2. Data Science Data analysis & visualization Machine learning & big data concepts Turning data into actionable insights 3. Interdisciplinary Subjects Business informatics Mathematics & modeling Legal and economic aspects of the web

Hammad Ahmed

Backend Developer | Fixing APIs, Elastic

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