Job Description
Principal Developer--Looking for SuperSenior/Extremely experienced Node.js & Java Developer with 15+ years of experience specializing in legacy system modernization and migration.
The ideal candidate will have deep expertise in Java, Node.js, microservices, cloud computing, and database modernization, with a strong background in migrating monolithic applications to modern architectures.
This role requires technical leadership, hands-on expertise, and strategic planning to ensure seamless transitions from legacy systems to scalable, high-performance solutions.
Key Responsibilities:
• Assess, analyze, and design modernization strategies for legacy NodeJS/Java applications, monolithic architectures, and outdated database systems.
• Lead the migration of legacy applications to microservices-based, cloud-native architectures using Java (Spring Boot, Hibernate) and Node.js (Express/Nest.js).
• Refactor and rewrite legacy codebases to improve scalability, maintainability, and performance.
• Implement automated migration tools, API gateways, and middleware solutions to ensure smooth integration with modern applications.
• Collaborate with business stakeholders, architects, and DevOps teams to define migration roadmaps, ensuring minimal disruption to business operations.
• Enhance legacy systems with event-driven architectures (Pulsar/Kafka) for real-time processing.
• Implement cloud-native solutions on AWS leveraging containerization (Docker, Kubernetes) and serverless technologies.
• Establish CI/CD pipelines, automated testing frameworks, and DevSecOps practices to accelerate modernization efforts.
• Provide technical leadership, mentoring, and best practice guidance to development teams during the transition.
Required Skills & Experience:
• 20+ years of experience in software development with a strong background in Java (Spring, Hibernate, JPA) and Node.js (Express.js, Nest.js).
• Expertise in legacy system migrations, including monolithic-to-microservices transformations.
• Strong knowledge of cloud computing platforms (AWS, Azure) and serverless computing.
• Hands-on experience in database modernization, schema refactoring, and ETL pipeline development.
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.
- The annual salary for this position is between $131,000 – $156,000 + 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. Applications will be accepted until December 6th, 2025
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*Please note, this role is not able to offer visa transfer or sponsorship now or in the future*
The Cognizant community: We are a high caliber team who appreciate and support one another. Our people uphold an energetic, collaborative and inclusive workplace where everyone can thrive.
- Cognizant is a global community with more than 300,000 associates around the world.
- We don’t just dream of a better way – we make it happen.
- We take care of our people, clients, company, communities and climate by doing what’s right.
- We foster an innovative environment where you can build the career path that’s right for you.
About us:
Cognizant is one of the world's leading professional services companies, transforming clients' business, operating, and technology models for the digital era. Our unique industry-based, consultative approach helps clients envision, build, and run more innovative and efficient businesses. Headquartered in the U.S., Cognizant (a member of the NASDAQ-100 and one of Forbes World’s Best Employers 2025) is consistently listed among the most admired companies in the world. Learn how Cognizant helps clients lead with digital at www.cognizant.com
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.
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