Senior Full-Stack Engineer — Java/Spring, React & APIs

Citi; Jacksonville (TX); On-site; USD 114,000 - 171,000; Full time

Benefits offered by this job

Medical coverage

Dental coverage

401(k)

Paid time off

Wellness program

Job summary

Citi in Jacksonville is seeking a Senior Application Developer to design, build, and support modern web applications across the stack—from React front end to Java/Spring Boot back end—in a fast-paced API-first microservices environment.

You will implement automated CI/CD pipelines, write unit and integration tests, collaborate with agile teams, and help modernize existing tools to improve developer efficiency and workflow.

Qualifications

• 5+ years of full-stack web development experience.
• Strong backend with Java and Spring Boot (REST, security, performance).
• Strong frontend with React, TypeScript, HTML5, CSS.
• Experience with API design and microservices architecture.
• Hands-on SQL Server and relational data modeling.
• Proficiency with GitHub workflows and CI/CD pipelines.
• Effective communication and collaborative agile mindset.

Responsibilities

• Full-stack design, build, and support of modern web apps (UI, APIs, backend).
• Develop scalable microservices with Java/Spring Boot and REST APIs.
• Automate provisioning of test data accounts and modernize toolsets.
• Collaborate with teams to provide customized data solutions.
• Contribute to CI/CD pipelines and maintain testing practices.
• Ensure reliability and availability of test data for scrum teams.

Skills

Full-stack dev

Java

Spring Boot

React

TypeScript

API design

Microservices

SQL Server

GitHub workflows

CI/CD

Agile teamwork

Communication

Education

Bachelor's degree

Tools

GitHub

Docker

Kubernetes

OpenShift

Job description

Citi in Jacksonville is seeking a Senior Application Developer to design, build, and support modern web applications across the stack—from React front end to Java/Spring Boot back end—in a fast-paced API-first microservices environment.

You will implement automated CI/CD pipelines, write unit and integration tests, collaborate with agile teams, and help modernize existing tools to improve developer efficiency and workflow.