Senior Integration Developer

We have a new exclusive role with our client and we can work C2C! The client needs an onshore and offshore resource. Same job description for both.

Job Title: Senior Integration Developer – Lawson (Infor) / AS400 (IBM i) – Procure to Pay

Visa Restrictions: No H1bs

Location: Remote

Project Overview

We are supporting a Procure-to-Pay (P2P) implementation of Zip for a client running Lawson (Infor) as their backend ERP. The client also operates a custom middleware platform built on IBM AS400 (IBM i) .

We are seeking two technical integration developers (1 Onshore Lead + 1 Offshore Developer) to support integration development between Lawson and the AS400-based middleware across master and transactional P2P data objects.

The P2P vendor will manage integrations between Zip and the middleware. This role focuses specifically on Lawson ↔ Middleware integration design, development, and support.

Role Responsibilities

Design and develop integrations between Lawson ERP and AS400 middleware

Develop and support inbound/outbound interfaces for P2P master and transactional data

Perform data mapping, transformation, and validation logic

Support API-based and/or file-based (CSV, XML, JSON) integrations

Implement error handling, logging, and reconciliation processes

Collaborate with P2P vendor technical team for end-to-end data flow validation

Participate in integration testing (SIT, UAT, Performance)

Support deployment and production stabilization

Document integration design and technical specifications

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

Required Skills & Experience

Core Technical Skills

Strong experience with Lawson (Infor S3 or CloudSuite) technical development

Experience building integrations involving Lawson

Hands-on experience with IBM AS400 / IBM i

RPG, COBOL, or AS400-based development experience

Experience integrating legacy middleware systems

REST and/or SOAP API integration experience

File-based integration experience (CSV, XML, flat files)

Strong SQL and data transformation skills

Understanding of Procure-to-Pay processes (AP, Purchasing, Vendor lifecycle)

Nice to Have

Experience integrating P2P systems (Zip, Coupa, Ariba, etc.)

Infor ION experience

IBM MQ or messaging framework experience

Experience working in blended onshore/offshore delivery models

Exposure to SOX-controlled environments

Ideal Candidate Profile (Onshore Lead)

8+ years ERP integration experience

Deep Lawson technical expertise

Strong architecture and design skills

Ability to interface directly with client technical leadership

Experience leading offshore developers

Ideal Candidate Profile (Offshore Developer)

4–7 years integration development experience

Strong AS400 / middleware development background

Experience supporting ERP integrations

Strong debugging and troubleshooting skills