Software Developer Java Backend

Nexgrid, LLC.; Fredericksburg (VA); On-site; USD 120,000 - 160,000; Full time

Job summary

Nexgrid, LLC. is hiring a mid-to-senior Software Developer to architect and build backend systems for AMI and smart grid deployments. You will work on large-scale Java applications that integrate AI, mobile platforms, and third-party systems to solve complex utility-software problems.

The role involves designing distributed services, APIs, and scalable data architectures while mentoring peers and driving architectural decisions in a cutting-edge grid tech environment.

Qualifications

• 5+ years of professional software development experience.
• Experience designing and optimizing relational databases at scale.
• Experience building REST APIs or similar server-side interfaces.
• Solid understanding of version control (Git) and CI/CD practices.

Responsibilities

• Design and architect distributed Java backend services handling millions of data points.
• Integrate AI and large language models into real-world infrastructure systems.
• Build scalable REST APIs and integration layers powering mobile apps and third-party connections.
• Collaborate with cross-functional teams on smart grid technology.
• Optimize relational databases to handle massive throughput and complex queries.
• Drive technical decisions on emerging technologies and architectural patterns.
• Write clean, maintainable code and mentor through code reviews.
• Contribute to architecture shaping the future of utility software.

Skills

Java backend

REST APIs

CI/CD

Database design

AI/ML integration

Mentoring

Education

Bachelor's degree in CS or Engineering

Tools

Git

PostgreSQL

OpenAI API

Job description

Unless otherwise stated Candidates must be authorized to work in the United States without visa sponsorship.

Job Description:

About the Role

Nexgrid is hiring a mid-to-senior Software Developer to architect and build next-generation backend systems for advanced metering infrastructure (AMI) and smart grid deployments. You'll work on large-scale, mission-critical Java applications that integrate AI/LLM capabilities, mobile platforms, and third-party systems''solving complex problems at the intersection of utility infrastructure and modern software innovation.

What You'll Do

• Design and architect distributed Java backend services handling millions of data points and complex business logic across utility networks
• Integrate cutting-edge AI and large language models into real-world infrastructure systems
• Build scalable REST APIs and integration layers that power mobile apps and third-party ecosystem connections
• Collaborate with cross-functional teams to push the boundaries of what's possible in smart grid technology
• Optimize and scale relational database systems to handle massive throughput and complex queries
• Drive technical decisions on emerging technologies and architectural patterns
• Write clean, maintainable code and mentor through code review
• Contribute to architecture that shapes the future of utility software

Required Qualifications

• 5+ years of professional software development experience
• Proven experience designing and optimizing relational databases at scale
• Experience building REST APIs or similar server-side interfaces
• Solid understanding of version control (Git) and CI/CD practices
• Bachelor's degree in Computer Science, Engineering, or equivalent professional experience

Preferred Qualifications

• Mobile app development experience (iOS/Android, or mobile-accessible APIs)
• Experience integrating with AI/LLM services (OpenAI, Claude, or similar)
• Experience with distributed systems, microservices, or high-throughput architectures
• Familiarity with smart grid, IoT, or utility software domains
• SQL optimization and database performance tuning

Why Nexgrid

We're building the platform that modernizes how utilities operate at scale. This isn't legacy maintenance''it's greenfield innovation combining utility infrastructure with AI, mobile, and modern cloud patterns. You'll solve real problems that impact millions of people.