Senior Full Stack Developer

NuAxis Innovations; United States; Remote; USD 120,000 - 180,000; Full time

Job summary

NuAxis Innovations seeks a Senior Full Stack Developer to modernize a legacy application into a Java/Spring Boot and React stack, guided by AI-assisted engineering practices. The role requires designing scalable services, ensuring functional parity with the legacy system, and setting standards for responsible AI usage across the team.

You will mentor mid-level developers, establish secure coding and DevSecOps practices, and integrate AI tools into the CI/CD pipeline.

Qualifications

• Bachelor's degree in Computer Science, Software Engineering, Information Technology, or a related field.
• 5–8 years of full-stack application development experience, including at least 2 years in legacy modernization or platform migration.
• One required certification and one certification obtainable after hire.
• Experience with AI-assisted development tools (GitHub Copilot or Amazon Q Developer) and secure coding principles.

Responsibilities

• Lead decomposition and reverse-engineering of legacy Delphi modules using AI-assisted code analysis.
• Architect and build target-state Java (Spring Boot) and React front-ends with functional parity to the legacy system.
• Define and enforce AI-assisted development standards, including prompts, reviews, licensing, and provenance checks.
• Build automated equivalence and regression harnesses with AI-generated test scaffolding.
• Integrate AI coding assistants into CI/CD with secrets hygiene and data-handling controls.
• Review all AI-generated code for correctness, security, and maintainability before production.
• Mentor mid-level developers on the target stack and AI-assisted engineering practices.

Skills

Java & Spring Boot

React & TypeScript

RESTful APIs

Relational data modeling

Legacy code analysis

AI-assisted tools (GitHub Copilot, Q)

Prompt engineering for code

DevSecOps

Education

Bachelor's degree in CS/SE/IT or related field

Tools

GitHub Copilot

Amazon Q Developer

LangChain

Jenkins/GitHub Actions

Job description

We are a federal IT company on a mission to make customer experience (CX) the center of every government solution.

Technology is our Passion. People are our Purpose.

We know tech, but we love people. NuAxis is home to thinkers and feelers; engineers and artists. We work hard and support each other along the way. Teamwork is more than just a buzzword for us, it’s a state of mind.

We believe happy employees do amazing work, so join our team NOW! We are currently seeking a talented and motivated Senior Full Stack Developer for a Full-Time position.

Role Summary

Leads modernization of a legacy fourth-generation language application into a Java and React stack, using AI-assisted engineering to accelerate code comprehension, translation, and test generation. Serves as technical authority for migration patterns and sets standards for responsible, verifiable use of AI tooling across the development team.

Key Responsibilities

• Lead decomposition and reverse-engineering of legacy Delphi modules, using AI-assisted code analysis to recover undocumented business rules and data flows.
• Architect and build target-state services in Java (Spring Boot) and front-end components in React, preserving functional parity with the legacy system.
• Define and enforce the team's AI-assisted development standards, including prompt patterns, human review gates, licensing and provenance checks, and prohibited uses.
• Build automated equivalence and regression harnesses, using AI-generated test scaffolding validated against legacy behavior.
• Integrate AI coding assistants into the CI/CD pipeline with secrets hygiene and data-handling controls appropriate to sensitive case data.
• Review all AI-generated code for correctness, security, and maintainability before merge; no AI output reaches production unreviewed.
• Mentor mid-level developers on both the target stack and disciplined AI-assisted engineering practice.

Minimum Qualifications

Minimum Education: Bachelor's degree in Computer Science, Software Engineering, Information Technology, or a related field. Two (2) years of specialized experience may substitute for one (1) year of the academic requirement. Minimum Experience: Five (5) to eight (8) years of full-stack application development experience, including at least two (2) years of experience in legacy modernization or platform migration, along with demonstrated production use of AI-assisted development tools. Certifications: One required certification and one certification obtainable after hire. Preferred certifications include Oracle Certified Professional Java SE, Microsoft Certified: Azure Developer Associate, AWS Certified Developer – Associate, AWS Certified Machine Learning – Specialty, Microsoft Certified: Azure AI Engineer Associate, or GitHub Copilot or equivalent AI-assisted development credentials. Required Skills: Java and Spring Boot, React and TypeScript, RESTful API design, relational data modeling, legacy code analysis, AI-assisted development tools such as GitHub Copilot or Amazon Q Developer, prompt engineering for code translation and test generation, secure coding, and DevSecOps practices. Preferred Skills: Experience with Delphi, Pascal, or comparable 4GL technologies; retrieval-augmented generation (RAG) over legacy codebases and documentation; large language model evaluation and output validation; strangler-fig and parallel-run migration patterns; and federal-sector experience. Technical Environment: Java 17+ with Spring Boot, React 18 with TypeScript, REST and GraphQL APIs, PostgreSQL, SQL Server or Oracle databases, Docker, Kubernetes, AWS or Azure, GitHub Copilot or Amazon Q Developer, LangChain, retrieval-augmented generation, vector stores such as pgvector and OpenSearch, CI/CD tools including Jenkins, GitHub Actions or Azure DevOps, testing frameworks such as JUnit, Jest and Playwright, SonarQube, and legacy Delphi and Pascal source analysis tools.

Our Profile:

We are an IT company with a unique mission—to make people the center of every federal IT solution. Our technologists have always gone the extra mile to help our federal clients succeed. And over the years, we saw a growing disconnect in how federal IT initiatives were built and managed.Time after time, programs failed because the focus was on the tools and products and not the people using them

Learn More

NuAxis is an Equal Opportunity Employer. Employment is contingent upon successful completion of a background investigation. Learn More about our Benefits and Culture!

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