Hello!

I'm Haythem Mejri

A Senior Backend & Full-Stack Engineer

Hire me My DevFolio

Hello!

I'm Haythem Mejri

With more than 13 years of experience

Hire me My DevFolio

About

About Me

Senior Backend & Full-Stack engineer with 13+ years of experience building scalable web applications and distributed systems. Specialized in Node.js and TypeScript, with expertise in microservices architecture, event-driven systems (Kafka, RabbitMQ), and API design (REST, GraphQL). Delivered 80+ projects across web and e-commerce platforms, with 6+ years of experience in Node.js and React.js. Led engineering teams for 5+ years. Strong experience with Agile/Scrum environments, contributing to continuous delivery and system reliability in cloud platforms (AWS, GCP, Azure).

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Resume

Resume

Experienced full-stack developer with 13+ years of expertise in web, mobile, and backend solutions, driving impactful results across various platforms and technologies.

2024-2026

Full Stack Developer

Toyota Motor Europe

  • Designed backend services and APIs that streamline vehicle‑conversion approvals, delivering faster data access for converter companies.
  • Enhanced checkout architecture by integrating payment solutions, cutting 80% of API response time and streamlining purchasing workflows.
  • Advanced TME e-commerce backend microservices using an event-driven architecture, enabling scalable integrations across platforms and reducing checkout-related production incidents by 90%.
  • Shipped features for a platform analyzing driving data to recommend hybrid and electric vehicles to Toyota customers, translating complex domain logic into production-ready applications.

Technologies: Node.js, TypeScript, JavaScript, React.js, MongoDB, Kafka, RabbitMQ, Git

2022-2024

Full Stack Developer

Glass Atlas (Space 48)

  • Crafted RESTful APIs and backend services for e-commerce platforms using Node.js and cloud services (GCP, Azure), targeting a 70% reduction in API latency.
  • Integrated third-party systems within microservices architectures, improving interoperability and scalability.
  • Led the redesign of 6 BigCommerce websites with a focus on performance, scalability, and user experience.
  • Resolved over 100 production issues, improving system stability and reliability.
  • Improved incident resolution time by over 50% through backend analysis and process optimization.

Technologies: Node.js, TypeScript, JavaScript, React.js, Next.js, Express.js, BigCommerce, Azure, GCP, Git

2019-2022

Full Stack Developer

Vista

  • Architected and built scalable backend systems and APIs, serving global users and processing 50k+ API requests daily.
  • Designed scalable architectural designs for backend applications leveraged by geographically distributed customers, resulting in a 60% reduction in system latency.
  • Headed the design of a complex system enabling users to initiate phone contact interaction with support teams in the Vistaprint, improving the average handle time metric by 150%.
  • Managed and mentored a team of 4 engineers, improving team performance and achieving a 25% reduction in employee turnover.
  • Developed customer support platforms (chat, help center & contact systems), improving operational efficiency and leading to a 10% reduction in support tickets.
  • Orchestrated cloud migration process from GCP to AWS, improving system scalability and reliability while achieving 30% cost savings.
  • Ensured 100% compliance with security standards as security co-lead for all care tech tribe frontend & backend applications.

Technologies: Node.js, TypeScript, JavaScript, React.js, Go, Angular, Gatsby, Express.js, Docker, Kubernetes, AWS, GCP, Git

2014-2019

Mobile Developer

Ekara (ip-label)

  • Engineered and rolled out a mobile automation testing platform improving testing efficiency.
  • Crafted and optimized the iOS version of an Internet performance measurement app, improving responsiveness and stability for thousands of users.
  • Implemented real-user monitoring solutions for mobile applications, enabling performance tracking across thousands of user sessions and devices.
  • Managed a team of 4 mobile developers, overseeing execution and technical delivery.
  • Collaborated with clients to define technical architecture and best practices.

Technologies: Objective-C, Swift, Java, Iron Python, JavaScript, C#, .NET, MySQL, Git

2012-2014

Web Developer

DataBiz

  • Built a ticket management system leveraged by 20+ agents, improving team efficiency and reducing backlog by 25%.
  • Engineered an alerting integration (Skype plugin) to deliver critical notifications to R&D teams, enabling faster incident response.
  • Revamped 10+ pages and components of the corporate website and delivered a vehicle inspection tracking application (web & mobile), improving user experience and streamlining operational workflows for 50+ users.

Technologies: PHP, MySQL, Java SE, JavaScript, WordPress, MySQL, Oracle, Git

2007-2009

Web Developer

Artifexsoft

  • Developed and maintained 6 e-commerce platforms using PHP and CMS frameworks.
  • Incorporated payment systems and optimized websites for SEO, achieving top rankings in Google search results for 3 keywords and improving transaction reliability.
  • Integrated 12 responsive interfaces from design assets, ensuring consistent behavior across devices and screen sizes.

Technologies: JavaScript, PHP, jQuery, MySQL, Joomla, OS-Commerce, PrestaShop, Magento

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Services

Services

Offering full-stack development and backend solutions to bring your ideas to life.

Full-Stack Developement

Backend Development

DevOps & Infrastructure

Skills

My Skills

Below are my core technical skills that I bring to every project.

Backend

Node.js

TypeScript

Express.js

Rest APIs

GraphQL

Microservices

Frontend

React.js

Next.js

Event-Driven

Kafka

RabbitMQ

Event Bridge

SNS / SQS

Cloud & DevOps

AWS

GCP

Azure

Docker

Kubernetes

CI/CD

Terraform

Serverless

Databases

MongoDB

MySQL

PostgreSQL

SQL Server

DynamoDB

Logging & Monitoring

New Relic

Prometheus

Sumo Logic

Testing

Jest

SuperTest

Sinon.js

Selenium

Cypress

JMeter

Other Languages

PHP

Java

Python

Go

C#

Other Frameworks

Angular

Vue.js

BigCommerce

Gatsby

CodeIgniter

Projects

My Projects

I specialize in creating innovative, scalable solutions across web and backend platforms. From building seamless e-commerce websites to developing powerful backend systems, my projects are crafted with a focus on performance, user experience, and cutting-edge technologies. Each project reflects my commitment to delivering high-quality, maintainable code that meets both client and user needs.

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I'm Available

I'm fully equipped for freelancingn contracts and full-time remote positions.

Hire me

Contact

Contact Me

If you are looking for a dedicated and skilled developer to join your team, feel free to contact me at haythemmejri05@gmail.com. I look forward to connecting!

Address

Tunis, Tunisia

Contact Number

+216 22 574 416

Email Address

haythemmejri05@gmail.com

LinkedIn

haythem-mejri