Looking for a senior, full-time react.js developer

Github URL (or equivalent) needed when applying. Applicants based in Europe only. We're looking for someone full-time to join the development team. We’re creating a brand new category of copy analytics. It’s a massive worldwide problem that hasn't been solved yet. You’ll be working together with some of the brightest minds in global data-based marketing. At Copytesting, you’ll deliver mission-critical adtech solutions to Fortune 5000 companies, including some of the most well-known online brands of this century. We take pride in having an entrepreneurial attitude - We’re a small, agile team that aims high and gets things done. We know people thrive when they get enough autonomy, purpose and mastery. We make sure you get enough of all three. The right candidate is self-driven and will have recent and multiple years of React experience. A minimum number of years of required previous full stack experience is 5 years. This is a long-term cooperation opportunity for a Senior React/Node.js Developer. You’ll participate in an agile delivery team. It’s a highly collaborative role and you’ll need to work closely with stakeholders, end-users, and technical team members. We do not micromanage - you’ll be responsible for your own deadlines and choose a way of working that fits you best. Job Description: Your primary focus will be on developing user interface components and implementing them following well-known React.js workflows. You will ensure that these components and the overall application are robust and easy to maintain. You will coordinate with the rest of the team working on different layers of the infrastructure. Benefits: Manage your own time and approach to work Have a say in what is being developed As much autonomy as you are able to handle Get connected to top players in the global adtech / SaaS community Responsibilities: Developing new user-facing features using React.js Building reusable components and front-end libraries for future use Translating designs and wireframes into high-quality code Optimizing components for maximum performance across a vast array of web-capable devices and browsers Understanding of backend infrastructure. Experience with A/B testing solutions like Google Optimize, Optimizely or VWO. Skills needed: Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model Thorough understanding of React.js and its core principles Experience with popular React.js workflows (such as Flux or Redux) Familiarity with newer specifications of EcmaScript Experience with data structure libraries (e.g., [login to view URL]) Knowledge of isomorphic React is a plus Familiarity with RESTful APIs Knowledge of modern authorization mechanisms, such as JSON Web Token Familiarity with modern front-end build pipelines and tools Experience with common front-end development tools such as Babel, Webpack, NPM, etc. Ability to understand business requirements and translate them into technical requirements A knack for benchmarking and optimization Familiarity with code versioning tools, such as Git, SVN, and Mercurial At least 3 years of prior experience as a developer Prior experience with machine learning (Tensorflow) is a plus