Position: Senior Node.Js Backend Engineer - Blockchain and Gaming
Company: Ultra
Experience required: 5y
English level: fluent

**The Role**
Ultra is looking for a senior Backend developer to join our growing team. This is an exciting project that will involve challenging problem solving and collaborating in architecting an innovative solution from the ground up.
In this role, you will design, implement, test, document and deploy backend services meeting business requirements. All the services will serve millions of users and will be deployed in the cloud. 
As a member of a feature team, you will be responsible for your services running in production and will ensure their availability, elasticity and resilience. You will contribute to the design and architecture to enable secure, scalable and maintainable software. You will develop reusable patterns and encourage innovation that will enable team velocity. You will also be asked to develop documentation on the new built system.

**Your Profile**
You are committed to using your technical skills to build a solid platform and deliver amazing user experience. You enjoy learning new and emerging technologies. You are pro open source, do not like to reinvent the wheel, you are a force of proposal and an excellent team player.
You are a problem-solver, critical thinker and a great communicator.

**Key Requirements**
5+ years NodeJS/Typescript development experience 
Experience in server/client side JS (nodeJS, expressJS, Typescript) 
Experience with SQL/noSQL databases 
Experience building large scale distributed systems 
Strong object-oriented design and development experience 
Knowledge of the principles to construct fault-tolerance, reliability and durability software systems 
Experience building microservices and designing REST APIs 
Experience with message brokers 
Proficiency in English, with great interpersonal skills

**It's great if you also have:**
GCP and/or AWS experience
Experience with Kafka
Experience deploying microservices with docker, kubernetes
Experience with CI/CD using Gitlab-ci
Experience with some aspect(s) of computer security: network security, application security, security protocols, cryptography, etc...)

**What you will do:**
Your challenges
All our services require highly scalable server architectures (+1mil concurrent user) where blockchain will ultimately impact all our infrastructural choices. Ultra could be considered as a multitude of smaller sub-projects, each having its own team leader. Your ability to advise and collaborate with multiple sub-teams simultaneously will define our project's success. You will work with offices all around the world, working remotely will be part of your daily routine.

Your tasks
Design, implement, test, document and deploy backend services in the cloud. As a member of a feature team, you will be responsible for your services running in production and will ensure their availability, elasticity and resilience. You will contribute to the design and architecture to enable secure, scalable and maintainable software. You will develop reusable patterns and encourage innovation that will enable team velocity. You will take part in the team's scrum rituals. You will develop documentation on the new built system.

**At Ultra, you will**
Learn every day and be involved in many exciting projects. Have the opportunity to grow with an ambitious and fast-paced company, on an innovative market. Have a lot of autonomy to put into practice what you advise, to set up new processes, and to share and implement your ideas with the team. Join an enthusiastic team and take part in Ultra's international expansion. Work with passionate colleagues in a multicultural, open-minded environment