About Me

As a full stack Engineer, I have a comprehensive understanding of both front-end and back-end development. I have experience with React, Angular, jQuery, Node.js (Express/NestJS), Django, and SQL/NoSQL databases. I build and deploy web applications, design and implement databases, and create/consume RESTful APIs. I work with Git/Bitbucket, Nginx, PM2, Docker, Redis, RabbitMQ, and server setups (MySQL/Mongo). I enjoy shipping reliable products and collaborating with cross-functional teams.

Name: Karrar al-zawaid

Birthday: 3 July 1995

Degree: Bachelor

Experience: 7 Years

Email: [email protected]

Address: Cluj, Romania

5

Years of

Experience

+10

Completed

Projects

Skills

Coding

Node (Express/Nest)

85%

Databases (SQL/NoSQL)

80%

Django

65%

React (JS/TS)

85%

jQuery

85%

Angular

70%

Design

CSS/SASS/SCSS

80%

Tailwind/Bootstrap

80%

Languages

- Arabic: Native or bilingual proficiency

- English: Professional working proficiency

- Romanian: Professional working proficiency

Education & Experience

Full Stack Engineer

FanDuel Full time
Aug 2024 / Present -

Responsibilities:
○ Full Stack Engineer contributing to mission-critical casino products operating at millions-of-users scale in a large-scale production environment.
○ Developed and maintained server-side rendered (SSR) applications using React and Next.js, improving performance, SEO, and reliability.
○ Implemented micro-frontend communication using postMessage to enable seamless integration across multiple front-end applications.
○ Built and maintained backend services using Node.js, Express, and NestJS within a microservices architecture.
○ Utilized Redis for caching, session management, and performance optimization across backend systems.
○ Designed scalable and resilient data solutions using AWS DynamoDB for high-throughput workloads.
○ Implemented predictable front-end state management using Redux and Zustand.
○ Owned and executed production deployments using Buildkite, ensuring safe, reliable, and frequent releases.
○ Monitored and supported live production systems using Datadog, including alerting, performance tuning, and incident response.
○ Used Amplitude for product analytics to track user behavior and drive data-informed decisions.
○ Demonstrated end-to-end ownership of features, from development and deployment to post-release monitoring and optimization.

Full stack engineer

Digital DooD Full time
July 2019 / August 2024 - 5 Years

Responsibilities:
○ Developed and maintained web applications using React, Angular, and jQuery.
○ Designed and implemented backend systems using Node.js, Express.js, NestJS, and Django.
○ Worked with both SQL and NoSQL databases, including MySQL, PostgreSQL, and MongoDB.
○ Implemented ORM solutions using TypeORM and Sequelize.
○ Deployed and maintained applications in production environments with global accessibility.
○ Optimized application performance and focused on user-centric design.
○ Used Docker for containerization and managed deployment workflows.
○ Worked with Azure services including Container Apps, Blob Storage, Cosmos DB, Azure Cache for Redis, and SQL Database.
○ Worked with AWS services including EC2 and S3.

Technical University of Cluj-Napoca

Bachelor's degree, Telecommunications and electronics and IT | 2016 - 2020

Graduated from an Information Technology and Telecommunications program with solid foundations in programming, networking and telecommunications through coursework and projects.

Universitatea Babes-Bolyai din Cluj-Napoca

Romanian language certification | 2015 - 2016

Proficient in Romanian language at B2 level.

Side Projects

Shipped products I build end-to-end

FitConnect

Fitness platform • Mobile + Web + Microservices

Live

A fitness platform connecting trainers with users—recipes, workout videos, events, and progress tracking.

React Native React + Vite Node.js NestJS MongoDB MySQL RabbitMQ Kubernetes Docker

Visit Contact about this

DevinoRoman

Learning app • Progress & practice

Live

Study & practice Romanian topics (Constitution, culture, geography, history) with progress, weak areas, and suggested practice.

React Node.js REST APIs POSTGRES Mongodb Mysql2

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Services

Available for freelance / contract / full-time — I ship production-ready apps.

Request a quote View CV

Full-stack Web Applications

React / Next.js + Node.js / NestJS

Build fast, reliable web apps with clean UI and scalable APIs — from MVP to production.

Modern UI, responsive layouts, accessible components
REST APIs, auth, role-based access, integrations
Performance, SEO (SSR), and maintainable architecture

MVP in weeks Clean code Production-ready

Deployment & Cloud Infrastructure

Docker / Kubernetes / Nginx / CI-CD

Deploy with confidence: secure, monitored, and easy to scale — with smooth releases and rollback.

Dockerized services + reliable networking
K8s deployments, rolling updates, autoscaling
Nginx, SSL, logging/monitoring, performance tuning

Zero-downtime releases Observability Cost-aware

Mobile Apps

React Native (iOS / Android)

Cross-platform mobile apps that feel native — with solid performance and smooth UX.

Reusable components & clean navigation flows
API integration, offline-friendly patterns, auth
App Store / Google Play release support

Fast iteration Great UX Store-ready

Architecture, APIs & Databases

SQL/NoSQL • Microservices • Messaging

Design systems that scale: strong data modeling, reliable APIs, and async workflows.

MySQL/PostgreSQL/MongoDB schema & optimization
Microservices, RabbitMQ, Redis caching
Security best practices & API documentation

Scalable Maintainable Secure

Karrar al-zawaid