For our client we are looking for Golang Software Engineer.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.The Engineering team at client is a fast growing group of talented engineers. They face multiple challenges associated with high performance, distributed systems, and processing large volumes of data in real time.A talented team of backend developers is looking at expanding its size, in order to accelerate our platform development to support our growing customer base. Our Engineers work on an exciting mix of both greenfield and existing projects, giving them an opportunity to explore new technologies.What you will do Developing a highly-concurrent and distributed system; Performance optimisation and problem diagnosis; Designing/Developing for high-availability; Designing/Developing and testing new features; Supporting release and documentation of developed features Estimating the effort required to develop and implement; Help defining coding standards and development processes; Provide out of hours support as part of an on-call rota. Essential Skills and Experience: Strong programming skills with Golang - min. 5 years. Proven experience of developing and maintaining enterprise grade systems at scale. Experience dealing with highly concurrent, distributed architectures/systems. Experience with containerized applications. Experience profiling / optimising performance. Experience with building REST/HTTP based services. Experience and understanding of relational and non-relational databases. Experience in unit and integration testing. Ability to effectively communicate problems and solutions to the different team members. Nice to have: Programming skills in JVM technologies eco-system. Understanding of Continuous Delivery in cloud environments. Exposure to AWS, Kubernetes, Nomad, Terraform, GitHub CI. General understanding of the telecommunications industry. Offer: Contract: B2B directly with US company (for 9 months) Salary: up to 160 pln/h 100% remote Polish time zone Polish public holidays Recruitment process: 1-2 technical calls