Full Stack Engineer / Application Owner

Full Stack Engineer / Application Owner : 1Sr. and 2 Jr. Salary : - DOE Location : North Andover, MA Our Client is a leading IT services and business platform company. They partner with global companies from diverse industries, including banking and financial services, insurance, higher education, food services, retail, manufacturing, and eCommerce. With expertise in digital transformation, machine learning, and emerging technologies, they offer a consulting-led, integrated suite of enterprise-grade software products, services, and solutions Role Overview We are seeking a Full Stack Engineer experienced in building and managing modern web applicationswith React, Node.js, AWS, MySQL, and PostgreSQL. The candidate will take responsibility for anexisting application, understand it end-to-end, and ensure a seamless transition from the currentresource. The role requires strong technical depth across backend, frontend, and cloud infrastructure, combinedwith an ownership mindset to manage application health, enhancements, and stakeholdercommunication. Key Responsibilities - Take complete ownership of an existing full stack application hosted on AWS. - Work closely with the current resource to understand the system s architecture, data model, APIs, andintegrations. - Maintain and enhance backend services built with Node.js, ensuring scalability, reliability, andperformance. - Develop and optimize frontend components using React for a seamless user experience. - Manage and optimize relational databases (MySQL and PostgreSQL) for high availability and efficientperformance. - Implement application deployments, monitoring, and cost optimization strategies on AWS. - Troubleshoot issues across the stack (frontend, backend, database, cloud). - Collaborate with stakeholders and act as the single point of accountability for the application. Required Skills & Experience - Strong experience with AWS services (EC2, RDS, S3, Lambda, API Gateway, etc.). - Proficiency in Node.js for backend development. - Expertise in React.js for modern frontend development. - Solid understanding and hands-on experience with MySQL and PostgreSQL (schema design,indexing, query optimization). - Knowledge of REST APIs, authentication, and integration best practices. - Ability to quickly analyze, document, and own existing systems. - Strong problem-solving and debugging skills. - Excellent communication skills for cross-functional collaboration. Preferred Qualifications - Familiarity with CI / CD pipelines and DevOps practices. - Experience with containerization (Docker, Kubernetes) on AWS. - Exposure to caching (Redis, Memcached) and messaging systems. - Background in application transition or ownership roles