Haystack
← Back to Jobs
Technology
NG

Java Backend Developer- W2

NGTalentTech Group LLCSt. Louis, MO🇺🇸United StatesPosted Sep 17, 2026

Quick Overview

Seniority
Mid Senior
Work mode
Hybrid
Location
St. Louis, MO, United States
Posted
Yesterday
MicroservicesMongoDBSpringSpring BootGenerative AIGitJavaREST

Job Description

Role: Senior Java developer- Backend developer
Location: St. Louis, MO (preferred), Denver, CO or Charlotte, NC (Secondary)
Duration: 12+ months base contract; likely extensions thereafter
Work Authorization: Any
Interview: 2 rounds; Offer

Job Description:
The ideal candidate will have:
Strong, hands-on Spring development experience
Strong Spring Boot experience
Strong Java development background
Experience building REST APIs
Experience developing backend services and integrations
Strong understanding of object-oriented programming
Experience working in an enterprise development environment
Experience with unit testing
Experience with Git and Maven
Experience working with CI/CD and modern development practices
Strong communication and collaboration skills
Agentic AI Experience
Experience working with AI, Generative AI, or Agentic AI is a plus, but it is not the primary requirement.
We are primarily looking for an experienced Spring/API developer who can support the backend infrastructure behind the AI-agent experience.
Candidates do not need to be AI engineers or build the AI models themselves.

Key Technical Focus
Must have:
Spring
Spring Boot
Java
REST APIs
Backend development
API integrations

Nice to have:
Agentic AI / GenAI experience
Microservices
MongoDB
Enterprise system integrations
CI/CD
Maven
Git

Similar jobs