vacancy **Middle+ Back-End Ruby Developer in a crypto-banking project **🚀

A large, actively growing crypto-banking project is looking for a strong Middle+ Back-End Ruby Developer ready to tackle complex challenges at the intersection of traditional finance and blockchain technologies.

Technology Stack: ✔️ Backend: Ruby, Rails, PostgreSQL, Redis; ✔️ Architecture: Trailblazer Operations, Dry-rb (Validation, Types), Alba (serialization); ✔️ Background Jobs: Sidekiq, sidekiq-cron; ✔️ API: REST, JWT authorization, Swagger/OpenAPI; ✔️ Integrations: Telegram Bot API, Blockchain nodes, payment gateways; ✔️ Infrastructure: Docker, GitLab CI/CD; ✔️ Testing: RSpec, FactoryBot. ** Required Tasks:** 🔸 Development and support of APIs for mobile applications (iOS/Android) and Telegram Mini Apps; 🔸 Design of complex business logic for financial operations based on Trailblazer; 🔸 Integration with external payment systems, banks, and crypto exchanges; 🔸 Performance optimization (SQL, Sidekiq) and work with high loads; 🔸 Code review, test coverage (RSpec); 🔸 Mandatory understanding of responsibility for one's own code.

Required Skills:

Mandatory 🔹 Commercial Ruby on Rails development experience of 3+ years; 🔹 Experience or strong desire to work with Clean Architecture (Trailblazer / Dry-rb); 🔹 Deep knowledge of PostgreSQL (indexes, locks, transactions) and Redis; 🔹 Confident work with background jobs (Sidekiq) and asynchronous programming; 🔹 Understanding of SOLID, DRY principles and the ability to write maintainable code; 🔹 Mandatory experience in writing tests (RSpec).

Desirable ◽️Experience in Fintech (billing, processing) or the crypto industry; ◽️Understanding of blockchain operations (gas, transactions, nodes); ◽️Experience with Telegram Bot API and Mini Apps specifics; ◽️Experience in code profiling and bottleneck identification.

What you will get: ⚫️Salary up to 4000 USDT ⚫️Work on an interesting and complex product in the Fintech sphere; ⚫️Clean architecture and adherence to Best Practices; ⚫️Opportunity to influence technical decisions; ⚫️Opportunity for professional growth; ⚫️Modern technology stack; ⚫️A strong team of professionals; ⚫️Opportunity to be independent with your code; ⚫️Flexible working hours;

If this sounds like you — write to me privately 👇 @Yuliya_Brendak