Full Stack Developer
New York, NY
Category: Development
Industry: Financial Services
Reference ID: JN -072026-107975
Date Posted: 07/20/2026
Shortcut: http://careers.eliassen.com/xRZIwY
Description:
Hybrid 4 days in New York, NY
Our client seeks a Full Stack Developer to design, develop, and maintain scalable software across the stack. The role requires strong React experience, REST API development, and work with Node.js, Java, Python, or .NET. The developer will apply TDD and BDD, collaborate in an agile environment, and contribute to microservices architecture, secure authentication, and responsive UI/UX.
We can facilitate w2 and corp-to-corp consultants. For our w2 consultants, we offer a great benefits package that includes Medical, Dental, and Vision benefits, 401k with company matching, and life insurance.
Rate: $89.00 to $99.00/hr. w2
Responsibilities:
- Design and develop responsive web applications using React.
- Build reusable UI components and implement modern design patterns.
- Integrate frontend with backend REST APIs and implement client-side auth flows.
- Ensure cross-browser compatibility, responsive design, and performance optimization.
- Collaborate with UX/UI to implement precise designs.
- Design, develop, test, and support backend services and RESTful APIs.
- Develop services using Node.js, Java (Spring Boot), Python (FastAPI), or .NET.
- Work with SQL Server, PostgreSQL, MongoDB, or Oracle for queries and performance.
- Implement secure components leveraging OAuth2, JWT, and API keys.
- Contribute to microservices design and development.
- Write clean, maintainable, and well-tested code following best practices.
- Participate in code reviews, technical discussions, and design sessions.
- Troubleshoot production issues across the stack and support stability.
- Collaborate with product owners, architects, UX/UI, QA, and DevOps.
- Participate in agile ceremonies, sprint planning, and estimation.
Experience Requirements:
- Strong JavaScript/TypeScript with hands-on React experience.
- Proficiency in HTML5, CSS3, responsive design, and state management tools such as Redux or Context API.
- Experience integrating RESTful APIs and handling asynchronous data.
- Knowledge of frontend testing frameworks such as Jest and React Testing Library.
- Working knowledge of at least one backend: Node.js, Java (Spring Boot), Python, or .NET.
- Strong SQL with SQL Server, PostgreSQL, or Oracle; familiarity with MongoDB or DynamoDB is a plus.
- Understanding of OAuth2, JWT, and API key based authentication.
- Familiarity with TDD and backend testing frameworks.
- Understanding of microservices and distributed systems.
- Strong debugging and problem-solving skills across the stack.
- Experience with version control such as Git and platforms like GitLab or GitHub.
- Understanding of CI/CD and modern deployment practices.
- Nice to have: TailwindCSS, Material-UI, Ant Design, Webpack/Vite, GraphQL, SSR/SSG (Next.js), data visualization libraries, PWA, WCAG/i18n, Redis, Kafka, event-driven patterns, API gateways, service mesh, ORM, Docker, Kubernetes, AWS/Azure/GCP, performance tuning.
- Preferred: enterprise UI experience, Agile/Scrum, secure API development, unit/integration/E2E testing (Jest, Cypress, Playwright, Selenium), package managers, TypeScript, code quality tools, WebSocket/SSE, responsive and mobile-first development, micro-frontends.
Skills, experience, and other compensable factors will be considered when determining pay rate. The pay range provided in this posting reflects a W2 hourly rate; other employment options may be available that may result in pay outside of the provided range.
W2 employees of Eliassen Group who are regularly scheduled to work 30 or more hours per week are eligible for the following benefits: medical (choice of 3 plans), dental, vision, pre-tax accounts, other voluntary benefits including life and disability insurance, 401(k) with match, and sick time if required by law in the worked-in state/locality.
If anyone reaches out to you about an open position connected with Eliassen Group, please ensure that you are working directly with us by confirming the following:
· When you work with Eliassen Group, all email communication will come from an Eliassen.com address, never Gmail, Yahoo, etc.
· Eliassen Group will never ask you for personal information (home address, bank account, or check routing number) until you have worked with someone clearly associated with Eliassen Group.
If you have any indication of fraudulent activity, please contact fraud@eliassen.com.
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Eliassen Group is an Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, pregnancy, sexual orientation, gender identity, national origin, age, protected veteran status, or disability status. Eliassen Group’s Affirmative Action Plan (AAP) is available for inspection by any employee or applicant for employment upon request, during normal business hours of Monday through Friday, 8:30am to 5:30pm EST. Interested persons should contact Phaedra Wells at pwells@eliassen.com for assistance. It is unlawful in Massachusetts and Maryland to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.
Applicants with disabilities that believe they require an accommodation or assistance with a position, please email our HR team at hradmin@eliassen.com. This email inbox is designed exclusively to assist job seekers whose disability prevents them from being able to apply online. Emails sent for other purposes will not receive a response.
Please be advised that a number of fraudulent job postings have been released under the Eliassen Group brand.
Unfortunately, fraudulent job postings can happen. If anyone reaches out to you about an open position connected with Eliassen Group, never provide personal or financial information to anyone who is not clearly associated with Eliassen Group
If anyone seemingly from Eliassen Group has ever requested this personal information in the past or does so in the future, please contact fraud@eliassen.com.
Please ensure that you are working directly with us by confirming the following:
- When you work with Eliassen Group, all email communication will come from an Eliassen.com address, never Gmail, Yahoo, etc.
- Eliassen Group will never ask you for personal information (home address, bank account, or check routing number) until you have worked with someone clearly associated with Eliassen Group, as indicated above