For our client we are looking for Senior Java Developer.Client is the emerging leader in the $100B+ cloud communications platform market. Customers like Airbnb, Viber, Whatsapp, Snapchat, and many others depend on our APIs and SDKs to connect with their customers all over the world.As businesses continue to shift to a real-time, customer-centric communications model, client is experiencing a time of impressive growth.Your key responsibilities:Design and build systems which add features to our fraud prevention platformWork with the Product team to define requirements, then iterate based on customerfeedbackWrite efficient and scalable code, in well-tested systems, running on public cloudinfrastructureEnd-to-end ownership of what you ship, from architecture discussions throughImplementation to monitoring in productionWhat you’ll bring:Excellent software engineering skills in Java and Spring - min. 6 yearsAn excellent practical understanding of high performance distributed computingA strong focus on testing, with a customer-first mindsetExperience of multi-threaded, 3-tier architectures, web services and cachingExperience dealing with event-driven pipelinesWillingness to learn and use different technology/programming languagesEnglish - min. B2Experience we consider a plus:Experience integrating with Machine Learning systems to deliver product featuresAbility to lead a project within the teamAWS with TerraformRedisKafkaWe offer:Contract: B2B directly with US companySalary: up to 160 pln/h100% remotePolish time zonePolish public holidaysRecruitment process: 1-2 technical calls