I'm the CEO of Vector Maths Limited. PTI were tasked with creating a bespoke Educational Maths Software for a UK based curriculum The original challenge was to build an eLearning platform. The application contains lots of small to enterprise-level functionalities. Specially subscription model and course management were challenging works For backend PHP technologies were used. Also, the building of this application was not possible without extensive use of many other things, e.g. Apache, MySQL, Javascript, Nginx, React/Angular, PostgreSQL, Redis, Redshift, AWS, Heroku, and many many more. They adhered to deadlines and checked and tested everything at each stage. Very good project management and communication, including an active Whatsapp group where discussion was regular. Attention to detail and their level of communication was exemplary — Darren Fernandes, Owner, Vector Maths Limited