Position: Senior Back-end Developer (Ruby on Rails)
Company: Freelance
Experience required: 3y
English level: intermediate

We're looking for a Senior Back-end Developer (Ruby on Rails) to join our team:
- Must have at least 4 years of experience with Ruby on Rails.
- Confident English (average+).
Only candidates from Ukraine. Do not disturb out RU BY.

✅ **About the company:**
Our company helps over 200K users to invest better and meet their financial goals faster. Our product is always evolving and we’re looking for a talented and experienced Backend (Ruby on Rails) developer to join us. We love working together to solve complex problems as much as we love hanging out together!
We have an awesome product. Our cutting-edge investing tools are helping over 200,000 paying subscribers exceed their financial goals!
We work hard to make our users happy and help them build wealth to achieve their life goals.

✅ **Responsibilities:**
- develop API for modern cross-platform responsible SPA from the ground up;
- participate in design and planning discussions, contribute architecture ideas;
- develop and test new user-facing features;
- write highly scalable, reusable and testable code;
- optimize application for maximum speed and performance;
- collaborate with other team members.

✅ **Requirements:**
- experience in OOP and MVC design and development patterns. Good understanding of data structures and design patterns;
- 4+ years of back-end development experience in building large, complex, highly scalable web applications using Ruby on Rails framework;
- solid understanding of Ruby syntax, its nuances and core concepts. Ability to write clean and readable code;
- familiarity with concepts of RESTful;
- experience building API’s, including authentication, cleanliness, and role-based access permissions;
- experience with SQL or NoSQL database technologies (e.g. MySQL, ElasticSearch, CouchBase, Redis, etc.);
- comfortable with source version control software (Git);
- knowledge and understanding of server-side architecture best practices;
- deep understanding of the HTTP protocol and networking;
- knowledge or experience with Cloud computing technologies and environments (Amazon Web Services).