Full Stack Developer

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

• 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.

• 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.

Recruitment Transparency Notice

Eliassen Group values transparency in our recruitment practices. Please be advised that Eliassen Group utilizes artificial intelligence (AI) tools as part of its initial application screening  and hiring process. You may receive email and SMS notifications from the Eliassen Virtual Recruiting Team ( View email address on us.fitly.work , View phone number on us.fitly.work) inviting you to complete a brief voice screening as part of your application process. These tools assist our hiring teams in different ways, including but not limited to, assistance in reviewing application materials to help identify candidates whose qualifications most closely match the requirements of the position. All AI-assisted evaluations and responses are reviewed by human recruiters before any hiring decisions are made. The use of AI in our process is intended to support fairness, efficiency, and consistency, and Eliassen Group takes measures to prevent bias or discrimination in connection with its hiring practices. By proceeding, you acknowledge, agree, and consent to Eliassen Group’s use of these tools, including AI tools, as part of the application and hiring process.

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.

· 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 View email address on us.fitly.work .

About Eliassen Group:

Eliassen Group is a strategic consulting firm that helps organizations reach further and achieve more through our technology, business advisory, and life sciences solutions. For nearly 40 years, we have combined exceptional people, deep domain expertise, and intelligent capabilities to expand our clients’ capacity and accelerate meaningful outcomes. We are driven by a purpose to positively impact the lives of our employees, clients, consultants, and the communities we serve.

Eliassen is committed to building a diverse and inclusive team from a variety of backgrounds, perspectives, and skills. We are an Equal Opportunity and Affirmative Action Employer and all employment decisions are based on merit, performance, and business needs. Eliassen does not discriminate on the basis of race, color, gender identity or expression, sexual preference or orientation, sex (including pregnancy, childbirth, and related medical conditions), marital status, creed, religion, physical or mental disability, genetic information, military or veteran status, age, ancestry, national origin, citizenship status, prohibited criminal record inquiries of applicants and employees, or any other category protected by federal, state, or local laws.

Don’t miss out on our referral program! If we hire a candidate that you refer us to then you can be eligible for a $1,000 referral check!