Tandem is the leading global language learning community, where 10 million members in over 180 countries practice languages together. The concept of learning from each other is not only an integral part of the Tandem community but it is also at the heart of our everyday lives at Tandem. This shared connection through learning helps us to grow and enhances the language journeys of our members. We are based in Berlin and are backed by top European investors. We are highly international and driven by a shared passion for languages, technology, and culture. Together, we are on a mission to build a product that not only teaches a new skill but also encourages meaningful cross-cultural conversations. Your role will be to: Play a crucial part in building and scaling a global consumer product. You will develop and maintain the existing application and API. Think writing the code for new product features, designing and implementing solutions that are efficient and pragmatic. Your work is going to impact millions of users. Daily tasks are to make sure the backend applications are deployed and running stable, follow industry practices for building, deploying, maintaining applications. Design, build and optimize existing backend application core/platform including storage/database, compute/environment, ci/cd, improve monitoring, do code reviews, shape, and contribute to the evolution of the whole platform. You will join a small team of professionals with well-established processes. You will use tools such as Docker (docker-compose, Dockerfiles, Puppet), CI/CD – AWS CodePipeline (CodeBuild, CodeDeploy) and Github to support your workflow and deployment. Our backend stack The server-side codebase is written in PHP 7, Golang and Kotlin. We use MySQL, Redis, ManticoreSearch, Sphinx and DynamoDB and have developed our own messaging service using Rabbit MQ + MQTT/AMQP. Our backend is hosted on AWS, using services such as ECR, EC2, ELB, VPC, R53, RDS, ElastiCache, S3, SQS, SNS, Lambda, IAM. We integrate with 3rd party APIs (e.g. Facebook, Google, Apple, Stripe, AliPay, WeChat, Baidu). You are the right fit for the role if you: Are an experienced engineer, passionate about building high performing backend applications. Ideally, you have contributed to open-source projects and built frameworks or libraries before. You’re keen to share your knowledge with your teammates and have a passion for learning. Being a language nerd is a big plus!
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