Busuu is one of the top EdTech companies in the world and has won numerous awards for its innovation and impact in language learning.Busuu’s vision is to empower everyone in the world through languages. We are the world’s largest online community for language learning, with more than 120+ million users from 190 countries, growing at up to 20,000 new users per day. We make learning a language easy by combining AI-powered courses with instant feedback from our global community of native speakers and live tutoring from qualified teachers across the world.In January 2022, Busuu was acquired by one of the largest EdTech companies in the world, Chegg (NYSE:CHGG). Being part of Chegg will help us to accelerate our growth and achieve our vision even faster.About the role:You’ll have the opportunity to be at the centre of our biggest and most exciting phase yet, making important decisions that will help you grow and define your career as a Software Engineer. You’ll ship code often, support it all the way to production, and work with our web/mobile engineers and product teams to ensure a joined-up experience for our users.You’ll be learning fast through different initiatives (guilds, reading clubs, learning together meetings, personal learning budget…), and keeping up with the latest industry standards.As a Backend Engineer, you’ll be key to us releasing high quality, bug free software daily and you'll be key to ensuring we are running at maximum efficiency to deliver for the business and our users.Our tech stack: Our projects are built on a distributed platform composed of different API services Some backend services are built with PHP 7 and Symfony, while others are built with NodeJS with TS The new microservices are built following SOLID coding standards and design patterns There is a possibility to use even more advanced techniques such as hexagonal architecture, CQRS, and Domain-Driven Design (with an event-driven architecture) if the developer wishes to do soWhat we’re looking for in a Senior Backend Engineer: Excellent knowledge of PHP/OOP and experience with a modern web framework (we use Symfony 3 to 5). Node.js experience is a plus Good experience of data modeling and performance optimisation using relational databases (we use MySQL and PostgreSQL) Solid knowledge of REST API design Experience with microservices architecture Experience with SOLID principles and design patterns Exposure to the architecture of high-traffic web platforms Experience with testing methodologies, performance debugging, and benchmarking Desire to learn and to write code using Node.js Experience in defining the whole process of development, from initial design to deployment and support Willing to participate in leading projects from a technical standpoint- Pension Flexi-working Free breakfast and snacks Bonus scheme Recruiter Screen Hiring Manager call Technical Interview OfferPHP, SymfonyPHP, Symfony, Node.js, Data Modeling, MySQL, PostgreSQL, APIs