Available for new projects

Hi, I'm Ziaeddin Najafian

Senior Full-Stack & Backend Developer with 10+ years of experience building scalable enterprise solutions

Java Spring Boot React Angular Microservices AI Integration
10+
Years in Java
8+
Years Spring Boot
6+
Years React/Angular
50+
Projects Delivered
3+
Years with AI/ML

Technical Skills

A comprehensive overview of my technical expertise and proficiency levels

⚙️

Backend Development

Java (8, 11, 17, 21) 10+ yrs
Spring Boot 2.x / 3.x 8+ yrs
Spring Cloud / Microservices 6+ yrs
Hibernate / JPA 8+ yrs
REST APIs / GraphQL 8+ yrs
🎨

Frontend Development

React.js 1+ yrs
Angular 3+ yrs
TypeScript 3+ yrs
Redux / NgRx 1+ yrs
Material UI / Tailwind 2+ yrs
🗄️

Databases

PostgreSQL 2+ yrs
MySQL 6+ yrs
MongoDB 1+ yrs
Oracle 5+ yrs
Elasticsearch 1+ yrs
☁️

Cloud & DevOps

AWS (EC2, S3, Lambda, RDS) 2+ yrs
Docker 6+ yrs
Kubernetes 1+ yrs
CI/CD (Jenkins, GitHub Actions) 6+ yrs
🤖

AI & Integration

OpenAI API / GPT Integration 1+ yrs
LangChain / LlamaIndex 1+ yrs
RAG Systems 1+ yrs
Vector Databases 1+ yrs
Spring AI 1+ yrs
📨

Messaging & Tools

Apache Kafka 1+ yrs
RabbitMQ 2+ yrs
Git / GitHub / GitLab 6+ yrs
Maven / Gradle 5+ yrs
JUnit / Mockito / Testing 5+ yrs
🔄

Data Engineering

ETL Pipelines 1+ yrs
Apache Airflow 1+ yrs
Apache Kafka 1+ yrs
Shell Scripting (Bash) 1+ yrs
Data Pipeline Automation 3+ yrs

Services I Offer

Specialized solutions tailored to your business needs

🤖

AI/LLM Integration

Add intelligent AI capabilities to your existing applications. From chatbots to automated document processing, I integrate GPT, Claude, and custom LLMs into your workflow.

OpenAI API LangChain RAG Chatbots Spring AI
🏗️

Spring Boot Microservices

Design and build production-ready microservices architecture. API Gateway, Service Discovery, Event-Driven systems that scale with your business.

Spring Cloud Eureka Kafka API Gateway CQRS
🔄

Legacy Java Migration

Modernize your Java applications without breaking production. Upgrade from Java 8/11 to 17/21, migrate to Spring Boot 3.x, and containerize your apps.

Java 21 Spring Boot 3 Docker Zero Downtime
📊

React/Angular Dashboards

Build responsive admin panels, analytics dashboards, and data visualization interfaces. Clean UX that your team and customers will love using.

React Angular Charts Material UI Responsive
🔌

API Development & Integration

RESTful APIs, GraphQL endpoints, third-party integrations. Clean documentation with Swagger/OpenAPI. Connect your systems seamlessly.

REST GraphQL Swagger Stripe AWS
📈

Data Engineering & ETL

Build robust data pipelines and ETL workflows. Automate data processing with Airflow, Kafka, and shell scripting for reliable data delivery.

ETL Airflow Kafka Shell Automation

Ready to Start Your Project?

I'm available for freelance projects and long-term collaborations. Let's discuss how I can help bring your ideas to life.

Available for New Projects