Very Senior PHP Developer (MUST know business applications like Vtiger CRM, SuiteCRM, Dolibarr CRM/ERP, WHMCS or similar)

We are looking for a full-time VERY SENIOR PHP DEVELOPER to work on large/complex projects. This role is paying 60k to 80k INR (Interview/technical tests will determine offer) per month full time (160 hours per month), projects are run from an established team in India/Kolkata so work is all on IST office hours. PLEASE READ THE JOB DESCRIPTION AND PROVIDE A TAILORED APPLICATION DETAILING YOUR SPECIFIC RELEVANT EXPERIENCE AND HOW YOU CAN HELP UP (DO NOT SEND A COPY-PASTE REPLY COVERING IRRELEVANT THINGS). Ideally, you will have experience in customising/extending open-source business applications like Vtiger CRM, SuiteCRM, Dolibarr CRM/ERP, WHMCS, or other ready-made open source business applications. These projects will also involve a lot of application integration work. Essential Requirements - You must be a Very Senior Developer with relevant skills/experience - Experience customising and extending ready-made open source applications - Experience in delivering large/complex projects - Must be able to pick up full projects (not a few tasks at a time) - Must be able to test own work (both for correctness and ensuring you haven't caused problems/issues in other parts of a system. - Must be able to deliver projects correctly to tight timescales