Senior Back-end engineer (Ruby/Rails)

We are looking for a performance-minded back-end engineer with an eye towards writing well-designed, maintainable code who will be responsible for managing and maintaining our back-end system(s) and operating related services connected to it and make sure they (become and) stay performant. Your primary focus will be the development of server-side logic, ensuring high performance and responsiveness of our back-end system and related services, like our databases (PostgreSQL, Redis), background jobs system (Sidekiq), and other services (internal and external). Since our backend system is not very new, there are a lot of opportunities to make it better and scalable so we can speed up the growth of our business worry-free. If you are someone who is not afraid to grab a system by its cables and get your hands dirty then you're at the right place. Key responsibilities Collaborating within our product team to develop new features, fix bugs, and reduce technical debt (you will be involved in the whole application lifecycle) Defining and communicating technical requirements Building high-quality systems that can be (re)used and extended in the future Helping set the design/architectural guidelines to make sure our codebase is improving Making sure our back-end is scalable (fast response times, optimized DB queries, …) Troubleshooting, debugging, and fixing production issues Required qualifications 5+ years of experience with Ruby and Rails in production on a decently sized project Experience building & growing web applications, APIs, services In-depth experience of back-end APIs (RESTful web services) In-depth experience of writing tests: unit, integration, … Very good understanding of databases: query performance, indexes, migrations (PostgreSQL) Experience working with background processing (Sidekiq) and how to optimize it for good performance Ability and desire to produce modular, maintainable code Solid understanding and experience of Git (branching workflows, managing conflicts, …) Solid understanding and experience with web (API) security Experience implementing caching on Rails APIs Experience working with WebSockets (we use Pusher, but that's not a requirement) Strong interest in continued (personal and professional) development (learning new technologies and programming languages) Good communication skills (English) and willingness to improve. We value quality over quantity Comfortable working in a remote distributed environment with a high degree of personal autonomy and responsibility

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