Full stack development on magento 1 platform: - migration from other platforms to magento1 - development of modules from scratch (backend and frontend) - development of full page cache modules (with or without magento style coding) - speed-up - integration with api and webservices - development of webservices/api - 3rd party modules installation and maintenance - overall maintenance (the platform itself and server side) - debugging and analysis - integration with/of 3rd parties - etc