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 platform Work with the Product team to define requirements, then iterate based on customer feedback Write efficient and scalable code, in well-tested systems, running on public cloud infrastructure End-to-end ownership of what you ship, from architecture discussions through Implementation to monitoring in production What you’ll bring: Excellent software engineering skills in Java and Spring - min. 6 years An excellent practical understanding of high performance distributed computing A strong focus on testing, with a customer-first mindset Experience of multi-threaded, 3-tier architectures, web services and caching Experience dealing with event-driven pipelines Willingness to learn and use different technology/programming languages English - min. B2 Experience we consider a plus: Experience integrating with Machine Learning systems to deliver product features Ability to lead a project within the team AWS with Terraform Redis Kafka We offer: Contract: B2B directly with US company Salary: up to 160 pln/h 100% remote Polish time zone Polish public holidays Recruitment process: 1-2 technical calls