Java FullStack Developer

AllianceIT Inc; New York (NY); On-site; USD 110,000 - 180,000; Full time

Job summary

AllianceIT Inc. in New York is seeking a senior full-stack developer to design and deliver scalable applications across frontend and backend.

You will work with React, Node.js, and TypeScript on complex microservices, craft robust RESTful APIs with OAuth/JWT authentication, and optimize SQL Server workloads while embracing clean architecture and SOLID principles. Hands-on with AI-assisted coding tools to accelerate development.

Qualifications

• 12+ years of experience in full stack development.
• Strong proficiency in React, including hooks, context API and modern tooling.
• Experience with Node.js, React, and TypeScript stack.
• Solid TypeScript experience with advanced types and patterns.
• Proficiency in Java with Spring Boot for production apps.
• Experience designing and integrating RESTful APIs and OAuth/JWT authentication.
• Experience with microservices, service contracts, and API documentation.
• Strong SQL Server skills with advanced queries and performance tuning.
• Experience leveraging AI agents in development, testing, and documentation.
• Solid understanding of design patterns, SOLID, and clean architecture.

Skills

Full stack development

React

Node.js

TypeScript

Java

Spring Boot

API design

Microservices

SQL Server

OAuth/JWT

RESTful APIs

CI/CD

Git

AI in development

Tools

Git

CI/CD pipelines

Job description

• 12+ years of experience in full stack development with strong proficiency across both frontend and backend technologies
• Strong proficiency in React with deep understanding of core concepts including component lifecycle, hooks, context API, state management, and modern frontend tooling
• Should have work experience in Nodejs, React, Type script skill set
• Solid experience with TypeScript including type systems, generics, interfaces, and advanced patterns
• Strong proficiency in Java with hands-on experience building production applications using NodeJs
• Good understanding in Spring boot framework
• In-depth experience with API design and integration — building RESTful APIs, integrating with multiple external systems, handling authentication protocols (OAuth, API keys, JWT), and managing data transformation across systems
• Experience building and maintaining microservices architectures with well-defined service contracts, inter-service communication, and API documentation
• Strong experience with SQL Server including complex queries, stored procedures, and performance optimization
• Hands-on experience leveraging AI agents (e.g., Claude Code, Cursor) in day-to-day development for coding, testing, and documentation
• Understanding of software design patterns, SOLID principles, and clean architecture practices
• Experience with version control systems (Git) and CI/CD practices