Job Title: Senior Backend Engineer Node.js (Payments Domain) Location: Johnston, New Jersey (Onsite) Employment Type: Contract (W2) Open Positions: 3 Start Date: Immediate Job Description We are seeking experienced Senior Backend Engineers with strong Node.js expertise and hands-on experience in the Payments domain. The ideal candidate will have a proven track record of designing and developing scalable payment APIs, transaction processing systems, and microservices in a cloud-native enviro