Full Stack Developer (Python/JavaScript)-Onsite, NJ

Roles & Responsibilities

• Application Development & Architecture
  
  

Design, develop, and maintain full-stack web applications using Python frameworks (Django, Flask, FastAPI) for backend services

Build responsive, dynamic front-end interfaces using ReactJS / VueJS / Angular with component-based architecture

Develop and maintain API-driven web applications with RESTful and GraphQL endpoints

Implement Material Design and Bootstrap frameworks for consistent, modern UI/UX across applications

Write clean, maintainable, well-documented, and testable code following industry best practices

• Database Design & Management
  
  

Design, optimize, and maintain database schemas using MySQL and/or MongoDB

Write complex SQL queries, stored procedures, and database migrations

Perform query optimization, indexing strategies, and database performance tuning

Ensure data integrity, backup strategies, and disaster recovery planning

• Testing & Quality Assurance
  
  

Develop and execute comprehensive test plans, test cases, and test strategies for web applications

Implement automated testing frameworks using Python (pytest, unittest, Selenium, Playwright)

Perform functional, regression, integration, performance, and API testing

Set up and maintain CI/CD pipelines with automated test suites

Conduct code reviews and enforce coding standards across the team

Identify, document, and track defects through resolution using bug tracking tools (JIRA, Azure DevOps)

• API Development & Integration
  
  

Design, develop, and test RESTful APIs and microservices

Create and maintain API documentation (Swagger/OpenAPI)

Integrate third-party APIs and services into existing applications

Implement API authentication, authorization, and security best practices (OAuth2, JWT)

• Legacy System Support (PHP/JavaScript/jQuery)
  
  

Maintain and enhance existing PHP-based web applications

Work with legacy JavaScript/jQuery codebases, refactoring where appropriate

Migrate legacy systems to modern frameworks and architectures incrementally

• Collaboration & Communication
  
  

Participate in Agile/Scrum ceremonies — sprint planning, daily standups, retrospectives, and demos

Collaborate with cross-functional teams including product owners, designers, and DevOps engineers

Provide technical mentorship and guidance to junior developers and analysts

Communicate technical concepts effectively to both technical and non-technical stakeholders

Create and maintain technical documentation, architecture diagrams, and runbooks

• Technical Specifications & Design
  
  

Participate in design reviews and contribute to technical specifications

Translate business requirements into technical solutions and detailed design documents

Evaluate and recommend new technologies, tools, and frameworks to improve development efficiency

Ensure applications meet non-functional requirements — performance, scalability, security, and accessibility

• DevOps & Deployment
  
  

Support application deployment processes and environment management

Work with containerization tools (Docker) and orchestration platforms

Monitor application health, troubleshoot production issues, and implement fixes

Maintain version control best practices using Git (branching strategies, pull requests, code reviews)

About Cognizant’s IoT Practice

Intelligent, IoT-enabled products will soon result in the proliferation of data and disrupt virtually all industries. To be successful, both large and small companies must leverage IoT capabilities by designing modern products that fundamentally connect people with processes. Within Cognizant IOT, we engineer industry-aligned, IoT-enabled products that merge industry needs with human drivers. Our intelligent products will revolutionize experiences and result in exciting, transformative outcomes. Without human-centered thinking, connected products are just standalone things—but with it, our modern connected products facilitate a unified way of life enjoyed by all.

Salary And Other Compensation

• The annual salary for this position is between $92,000 – $118,000 Bonus depending on experience and other qualifications of the successful candidate. This position is also eligible for Cognizant’s discretionary annual incentive program, based on performance and subject to the terms of Cognizant’s applicable plans. 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.
• Please note, this role is not able to offer visa transfer or sponsorship now or in the future*
• Applications will be accepted until April 19th , 2026
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