Senior Full Stack Developer (React/Java)

Job Summary: Fully onsite in McLean, VA Location: McLean, Virginia Job Type: Contract Salary: $70 - $100 per hour Work Hours: 9am to 5pm Education: Bachelors 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. 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 and problem‑solving ability. Preferred Qualifications Graduate degree in Computer Science, Mathematics, Statistics, or a related quantitative discipline. Familiarity with relational databases and writing complex SQL queries. Experience with message brokers or event‑driven architectures (e.g., Kafka, RabbitMQ) in a financial services context. Exposure to cloud platforms (AWS, Azure, or GCP) and CI/CD pipeline tooling (Jenkins, GitHub Actions, etc.). Experience using JIRA or similar tools for Agile planning, sprint tracking, and delivery management. Prior experience in financial services, capital markets, or fintech environments. Proficiency with shell scripting for automation, deployment support, and operational troubleshooting. Working knowledge of fixed income concepts: duration, convexity, spread, option‑adjusted spread (OAS), and related derivatives. Equal Opportunity Employer Race, Color, Religion, Sex, Sexual Orientation, Gender Identity, National Origin, Age, Genetic Information, Disability, Protected Veteran Status, or any other legally protected group status. Other Information At Randstad Digital, we welcome people of all abilities and want to ensure that our hiring and interview process meets the needs of all applicants. If you require a reasonable accommodation to make your application or interview experience a great one, please contact View email address on click.appcast.io. Pay offered to a successful candidate will be based on several factors including the candidate's education, work experience, work location, specific job duties, certifications, etc. Randstad Digital offers a comprehensive benefits package, including medical, prescription, dental, vision, AD&D, and life insurance offerings, short‑term disability, and a 401K plan (all benefits are based on eligibility). This posting is open for thirty (30) days. #J-18808-Ljbffr Randstad USA