.NET Developer — Business Platform Gainbooks | Remote (WFH) | 1-3 years | Full-time

About Gainbooks We are building a business operating platform for Indian MSMEs — a single connected system where a business manages its leads, customers, orders, tasks, communications, and records without stitching together five different tools. Gainbooks brings together WhatsApp-native communication, workflow automation, and day-to-day business operations in one place — designed specifically for the way small and mid-size Indian businesses actually work. We are backed by three decades of ground-level MSME software experience through Saral, a business management system, served more than 50000 customers across India. That distribution network, domain depth, and customer trust is the foundation we are building Gainbooks on top of. This is not a services company. You will work on a product real businesses depend on daily — and your decisions will directly shape how modules behave. What this role is You won't just code screens. You will understand why a system should behave a certain way, translate business logic into reliable software, and own the behaviour of the modules you build — not just deliver tickets. You will work across workflow-driven modules, internal coordination systems, communication automation, data and validation logic, APIs consumed by mobile apps, and the application of Gen AI to business communication and operations. You will be working with proprietary DLLs and architecture and an existing codebase — understanding inherited code and building confidently on top of it is a core part of this job Two tracks you will work on Gainbooks (greenfield): A modern .NET Web API and mobile-connected platform. New modules, new logic, new integrations. You define how things work from scratch. Saral modernisation: A 30-year-old DOS/legacy ERP being migrated to a WinForms/.NET application. You will work with real business workflows — billing, inventory, acc