Senior .NET Full Stack Engineer - IBM i / iSeries / AS400

Overview

Senior Full Stack Engineer to support and modernise the E-commerce Fulfilment technology landscape, supporting critical IBM i / AS400 applications while progressively moving capabilities to modern C#/.NET services and Microsoft Azure.

What you'll do

• Develop a strong understanding of the existing IBM i / AS400 application landscape, including business processes, integrations, operational workflows and embedded business logic.
• Work with RPG, CL and DB2 applications, contributing to enhancements, defect resolution, troubleshooting and production support.
• Provide backup and contingency support for critical IBM i applications and help ensure continuity of existing business capabilities.
• Capture and document critical application logic, dependencies and support processes, working with SMEs to retain and transfer legacy knowledge and reduce key-person dependency.
• Design, develop, test and deploy modern applications using C#, .NET, REST APIs, front-end technologies and Microsoft Azure.
• Modernise existing capabilities by translating IBM i workflows, business rules, integrations and data into scalable and maintainable modern services and applications.
• Build APIs, integrations and cloud capabilities using secure engineering, automated testing and CI/CD practices.
• Troubleshoot and perform root-cause analysis across IBM i, integration and modern application layers.
• Collaborate with Product, Architecture, Operations and Engineering teams to support current applications while shaping future solutions.

What you'll need

• Strong hands-on C# / .NET full-stack development experience.
• Working knowledge of IBM i / iSeries / AS400 applications.
• Working knowledge of RPG, CL and DB2, with the ability to understand existing code and business logic.
• Experience developing REST APIs and enterprise integrations.
• Experience with Microsoft Azure or cloud-based application development.
• Experience with modern front-end technologies such as React, Angular or equivalent.
• Experience with Git, automated testing, CI/CD and secure software engineering practices.
• Experience supporting production applications, troubleshooting complex issues and performing root-cause analysis.
• Strong learning agility and a willingness to work hands-on across both legacy and modern technology stacks.

Nice to have

• Experience in Warehouse Management, Distribution, Supply Chain or E-commerce Fulfilment technologies.
• Experience modernising IBM i or other legacy applications into modern services, APIs and cloud platforms.
• Familiarity with GitHub Copilot or GenAI-assisted software engineering.

Details

• Location: APAC Home Office, Salarpuria Sattva Knowledge City, Inorbit Road, Hyderabad, IN.