ERP Integration Developer

Need freelance support for ERP INTEGRATION DEVELOPER work Shifts : US hours type: contract 1+yr Experience: 5-10 yrs Job Description Role: Senior Integration Developer – Lawson (Infor) / AS400 (IBM i) – Procure to Pay Location: India (Remote) Project Overview We are supporting a Procure-to-Pay (P2P) implementation of Zip for a client operating on Lawson (Infor) as their backend ERP system. The client also utilizes a custom middleware platform built on IBM AS400 (IBM i). We are hiring two technical integration professionals: 1 Onshore Lead 1 Offshore Integration Developer The selected candidates will be responsible for designing, developing, and supporting integrations between Lawson ERP and the AS400-based middleware across master and transactional P2P data objects. Key Responsibilities Design and develop integrations between Lawson ERP and AS400 middleware Build and support inbound/outbound interfaces for P2P master and transactional data Implement data mapping, transformation, and validation logic Develop API-based (REST/SOAP) and file-based (CSV, XML, JSON, flat files) integrations Implement robust error handling, logging, and reconciliation mechanisms Collaborate with P2P vendor technical teams for end-to-end validation Participate in SIT, UAT, and performance testing Support deployment, go-live, and production stabilization Prepare and maintain technical design and integration documentation. Required Skills & Experience Core Technical Skills Strong experience with Lawson (Infor S3 or CloudSuite) technical development Experience building and supporting Lawson integrations Hands-on experience with IBM AS400 / IBM i RPG, COBOL, or AS400-based development expertise Experience integrating legacy middleware platforms REST and/or SOAP API integration experience File-based integration experience (CSV, XML, flat files) Strong SQL and data transformation skills Good understanding of Procure-to-Pay processes (AP, Purchasing, Vendor lifecycle) Profile should be good at: 4–7 years of integration development experience Strong AS400 / middleware development background Experience supporting ERP integrations Strong debugging and troubleshooting skills Data Objects in Scope: Master Data Vendor Master Item Master Chart of Accounts Accounting Units / Cost Centers Payment Terms Approvers / User Data Transactional Data: Requisitions Purchase Orders Receipts Invoices Credit Memos Payment Status Updates Anyone interested in contact: mail: [Upgrade to PRO to see contact]