Backend Engineer (.NET, Recommendation Systems)

Nasze wymagania: has strong experience developing production backend systems in C# is comfortable designing data models and working with relational databases using EF Core and PostgreSQL can design and maintain REST APIs used by client applications and external integrations has experience working with cloud infrastructure in Azure (e.g. App Services, Storage, Functions, or similar services) understands how distributed backend services communicate and interact in production environments has experience integrating external APIs and third-party services reliably can extend existing architecture independently and deliver new backend features end-to-end writes clean, maintainable code following solid engineering practices (e.g. SOLID principles) has a basic understanding of machine learning concepts, especially how recommendation or ranking systems interact with backend services O projekcie: You will work on backend systems supporting a production mobile application. Your work will include integrating external APIs, implementing automated platform workflows, and developing ranking and classification logic used directly to generate user-facing content. Zakres obowiązków: implementing integrations with external payout and financial infrastructure providers (e.g. Trolley) developing automated user withdrawal and earnings-processing logic integrating and managing multiple external partner APIs and optimizing data selection between them building internal moderation and administration backend tools implementing automated detection of unavailable or invalid external resources designing fallback logic when referenced content becomes unavailable developing classification logic for organizing content into categories and contexts improving ranking and recommendation logic used for generating personalized content feeds Oferujemy: Strong influence on architecture and technology decisions Flexible and remote working mode Collaboration in international environment