React Full Stack Developer

Zillion Technologies, Inc.; McLean (VA); On-site; USD 117,096 - 123,984; Full time

Benefits offered by this job

Medical insurance

Dental insurance

Vision insurance

401(k)

Job summary

Zillion Technologies, Inc. is seeking a Full Stack Senior React Developer located in McLean, VA. The role demands 5+ years of experience, with a focus on front-end development in React and Typescript, alongside back-end expertise in Java and Spring Boot.

The successful candidate will design responsive UIs, develop scalable APIs, and ensure high code quality through thorough testing. A comprehensive benefits package is offered, including medical, dental, vision, and 401(k).

Qualifications

• 5+ years of professional software development experience.
• 3+ years of hands-on React development experience.
• 2–3 years of experience with Git.
• 1–2 years of experience with containerization technologies.

Responsibilities

• Design and build responsive UIs in React.
• Architect and develop scalable Spring Boot APIs.
• Integrate backend services with market data.
• Write clean, maintainable code with automated tests.

Skills

React development

Java

Spring Boot

Git

TypeScript

Docker

JUnit

Tools

Kubernetes

React Testing Library

Redux

Job description

Work sponsorship is available for this position.

Job Title: React Developer-Full Stack Senior

Locations: Mclean, VA (5 days a week)

Interview Type: In-Person

Job Overview:

Must Have Qualifications: Candidates must have 5+ years of experience, with a strong emphasis on front end development (approximately 70%) using front end applications such as React and Typescript, complemented by back-end development (30%) using Java and Spring Boot.

Key Responsibilities

Frontend Development: Design and build responsive, performant UIs in React (with TypeScript preferred) that allow users to configure, run, and visualize results across multiple security types.

Backend Development: Architect and develop scalable Spring Boot RESTful APIs and services that integrate with multiple upstream data sources and analytics systems.

System Integration: Connect backend services to existing internal platforms to retrieve market data, run risk analytics, and surface results to end users.

Code Quality & Testing: Write clean, maintainable code backed by comprehensive automated tests using JUnit and React Testing Library / Jest, with strong unit and integration coverage.

Technical Debt & Continuous Improvement: Proactively identify and resolve defects, reduce technical debt, and champion software engineering best practices across the codebase.

Collaboration & Delivery: Coordinate across the full stack — data, services, APIs, and infrastructure — to deliver end-to-end.

Design & Code Reviews: Actively contribute to architecture discussions, pull request reviews, and technical documentation with a focus on thoughtful, scalable design.

Required Qualifications

5+ years of professional software development experience, with strong proficiency in Java and the Spring Boot ecosystem (REST APIs, Spring Security, Spring Data JPA, etc.).

3+ years of hands-on React development experience, including component architecture, state management (e.g., Redux, Zustand, or React Query), and API integration.

2–3 years of experience with Git in a collaborative, team-based development workflow (branching strategies, PRs, code reviews).

1–2 years of experience with containerization and orchestration technologies (Docker, Kubernetes, or Podman).

Experience with TypeScript and modern React tooling (Vite, Next.js, etc.).

Solid experience with JUnit and/or other automated testing frameworks; commitment to high test coverage.

Strong communication skills with the ability to bridge technical and business conversations.

Demonstrated critical thinking, problem-solving ability.

Benefits

We offer a benefits package including medical, dental, vision, and 401(k).

Compensation

$85.00 – $90.00 per hour. This is the targeted compensation range for this role per year. Please note that this range is provided as a guideline and the final offer will be based on several factors, including but not limited to, skillset and competencies, level of experience, education, certifications, and location.

We are an equal opportunity employer. We do not discriminate on the basis of race, color, religion, sex, national origin, age, disability, genetic information, veteran status, sexual orientation, gender identity, or any other characteristic protected by applicable federal, state, or local law.