**Job Description** Principal Node.js & Java Developer – Legacy Code Migration Specialist Looking for **Super** **Senior/Extremely experienced Node.js & Java Developer** with **20+ 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analyze, and design** modernization strategies for **legacy NodeJS/Java applications** , monolithic architectures, and outdated database systems.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** . • Experience with **API modernization** , including **RESTful APIs, GraphQL, and event-driven patterns** . • Deep understanding of **DevOps, CI/CD pipelines (Jenkins, GitHub Actions, GitLab CI/CD), and Infrastructure as Code (Terraform, Ansible, CloudFormation)** . • Strong experience in **performance optimization, security hardening, and system reliability improvements** . • Proven ability to **reverse-engineer complex legacy systems** , understand business logic, and design modern replacements. • Excellent **problem-solving, analytical, and stakeholder management skills** . **Preferred Qualifications:** • Experience with **AI-driven code refactoring tools and automated legacy code analysis** . • Experience in **Cold Storage & Warehouse Management Systems (WMS)** & Automated Retrievals and Storage systems • Supply chain logistics, inventory management, and warehouse automation • Experience with **low-code/no-code platforms for rapid modernization** . • Contributions to **open-source modernization frameworks or cloud migration tools** . 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 – $180,000 + 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 October 16th, 2025 Cognizant is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to sex, gender identity, sexual orientation, race, color, religion, national origin, disability, protected Veteran status, age, or any other characteristic protected by law.