Senior Java React Jobs in New Jersey (NOW HIRING)

About the role
As a Senior Full Stack Engineer, you will provide technical leadership across the full software development lifecycle, driving architectural decisions, establishing engineering best practices, and ensuring the successful delivery of production-grade applications leveraging React, Java Spring Boot, GraphQL/REST APIs, AWS services, and modern event-driven architectures.
In this role, you will:
• Lead the end-to-end delivery of full stack applications using React, Java Spring Boot, GraphQL/REST APIs, AWS services, and event-driven technologies.
• Define and review application architecture, API contracts, service boundaries, data models, and integration patterns.
• Develop secure, high-quality, maintainable code while promoting engineering excellence through code reviews and technical mentorship.
• Design and support highly available, scalable, and performant systems with strong operational and reliability standards.
• Implement secure authentication and authorization solutions using OAuth2, OIDC, JWTs, and service-to-service security patterns.
• Establish observability practices including logging, monitoring, tracing, alerting, and operational runbooks.
• Collaborate closely with Product, UX, and business stakeholders to translate requirements into technical solutions and delivery plans.
• Evaluate internal and third-party technology solutions and provide recommendations based on scalability, security, maintainability, and business fit.
• Drive continuous improvement initiatives focused on automation, testing, deployment practices, and operational excellence.
• Promote adoption of modern engineering practices, including AI-assisted development tools and cloud-native technologies.
Work model: Hybrid
We believe remote work is the way forward as we strive to provide flexibility wherever possible. Based on this role's business requirements, this is a remote position requiring 3 days a week in a client or Cognizant. Location: Jersey City, NJ
Please note: A few of our roles may require in-person interviews at Cognizant offices or client locations, depending on project or client needs.
The working arrangements for this role are accurate as of the date of posting. This may change based on the project you're engaged in, as well as business and client requirements. Rest assured; we will always be clear about role expectations.
What you need to have to be considered:
• Bachelor's degree in computer science, Engineering, Information Technology, or a related field, or equivalent work experience.
• 8+ years of experience designing, building, and supporting enterprise-scale software applications.
• Proven experience providing technical leadership, owning solution design, and guiding engineering teams.
• Strong expertise in React, including TypeScript, component architecture, state management, responsive design, and performance optimization.
• Deep experience developing applications using Java and Spring Boot frameworks.
• Hands-on experience designing and implementing GraphQL APIs, including schema design, performance optimization, and governance practices.
• Strong understanding of REST API design standards, versioning, backward compatibility, and API lifecycle management.
• Experience implementing authentication and authorization solutions using OAuth2, OpenID Connect (OIDC), JWTs, scopes, and claims-based security.
• Hands-on experience building and operating cloud-native solutions within AWS environments.
• Strong knowledge of AWS services, IAM, networking fundamentals, monitoring, logging, and operational tooling.
• Experience working with relational databases, including PostgreSQL/AWS Aurora PostgreSQL, covering query optimization, indexing, data modelling, and migration strategies.
• Experience working with graph databases such as AWS Neptune, including graph modelling and query optimization.
• Strong understanding of event-driven architectures and messaging platforms such as AWS Managed Streaming for Apache Kafka (MSK).
• Experience implementing CI/CD pipelines, automated testing frameworks, code quality controls, and modern release practices.
• Demonstrated proficiency using AI-assisted engineering tools such as GitHub Copilot and/or Claude Code to enhance software development productivity while maintaining quality, security, and compliance standards.
*Please note, this role cannot offer visa transfer or sponsorship now or in the future*
These will help you stand out:
• Infrastructure as Code (Terraform, AWS CloudFormation, or AWS CDK).
• Containerization and orchestration technologies such as Docker, Amazon ECS, or Amazon EKS.
• Application security practices, including threat modelling, secrets management, dependency management, and OWASP security principles.
• API governance, platform engineering standards, service templates, reliability engineering, and SLO/SLI frameworks.
• Oracle HCM integrations and enterprise HR technology ecosystems.
We're excited to meet people who share our mission and can make an impact in a variety of ways. Don't hesitate to apply, even if you only meet the minimum requirements listed. Think about your transferable experiences and unique skills that make you stand out as someone who can bring new and exciting things to this role.
Salary and compensation:
The annual salary for this position will be between $80,000 to $141,000 per year depending on the experience and other qualifications of the successful candidate. This position is also eligible for Cognizant's discretionary annual incentive program and stock awards, based on performance and subject to the terms of Cognizant's applicable plans.
Applications will be received by August 7 th , 2026.
Benefits: Cognizant offers the following benefits for this position, subject to applicable eligibility requirements:
• Medical/Dental/Vision/Life Insurance.
• Paid holidays plus Paid Time Off.
• 401(k) plan and contributions.
• Long-term/Short-term Disability.
• Paid Parental Leave.
• Employee Stock Purchase Plan.
Disclaimer: The salary, other compensation, and benefits information is accurate as of the date of this posting. Cognizant reserves the right to modify this information at any time, subject to applicable law.
About Cognizant:
Cognizant (Nasdaq: CTSH) is an AI Builder and technology services provider, bridging the gap between AI investment and enterprise value by building full-stack AI solutions for our clients. Our deep industry, process and engineering expertise enables us to build an organization's unique context into technology systems that amplify human potential, drive tangible outcomes and keep global enterprises ahead in a fast-changing world. See how at cognizant.ai or @cognizant.
Additional employment information
Compensation information is accurate as of the date of this posting. Cognizant reserves the right to modify this information at any time, subject to applicable law.
Applicants may be required to attend interviews in person or by video conference. In addition, candidates may be required to present their current state or government issued ID during each interview.
Cognizant is an equal opportunity employer. Your application and candidacy will not be considered based on race, color, sex, religion, creed, sexual orientation, gender identity, national origin, disability, genetic information, pregnancy, veteran status or any other characteristic protected by federal, state or local laws.
If you have a disability that requires reasonable accommodation to search for a job opening or submit an application, please email [email protected] for roles based in the Americas or [email protected] for roles based in India.