Full Stack Engineer – Real-Time Web Apps (Java/Spring + Kubernetes + AWS)

Job Title: Full Stack Engineer – Real-Time Web Apps (Java/Spring + Kubernetes + AWS) Location: Lowell, MA Company: Kingfisher Company Inc.

: We are seeking a Full Stack Software Engineer to join our team in Lowell, MA. This role focuses on building end-to-end web applications that interface with our Java/Spring and Kubernetes-based IoT platform as well as support existing AWS platform applications. You will primarily develop both user-facing web applications and the Kubernetes-backed services that power them, working across frontend, backend, and Kubernetes infrastructure to deliver real-time monitoring and control systems for emergency communication devices. This is an onsite role in Lowell, MA (no remote). U.S. work authorization required

: · Design and develop JV/Spring and Kubernetes-based applications for intelligent emergency reporting systems and devices · Support real-time applications that interact with physical devices via MQTT, AWS IoT Core, AWS Lambda, AWS Amplify, Dynamo DB · Maintain and improve existing AWS infrastructure (CloudWatch, logging, alarms, deployments) · Collaborate with hardware, firmware, and mobile teams to deliver cohesive system functionality · Participate in architecture discussions and help evolve system design Core Skills · Proficiency in building full-stack web applications with Java/Spring framework, JavaScript / TypeScript and backend Nodejs is a big plus · Experience with React or Vue · Solid understanding of HTML, CSS, and responsive UI design · Proficiency with REST, GraphQL and WebSocket is a plus · Proven experience with Kubernetes backed services and AWS Cloud / AWS Experience (important but not dominant) · Experience with AWS services such as: Lambda API Gateway DynamoDB IoT Core · Familiarity with event-driven or serverless architectures · Basic experience with CloudWatch, logging, and monitoring · Understanding of deployment workflows (CI/CD is a plus) · Experience with Kubernetes

and Experience: · Bachelor's degree in Computer Science, Computer Engineering, Electrical Engineering or related field is required. Master's degree in related fields would be a plus · 2+ years’ experience in Software development in a product oriented environment