Middle+ Backend Developer

Location: Moscow, Russia; St. Petersburg, Russia; Belgrade, Serbia Workplace: remote At NOVACARD, we’re redefining how people use credit. We are the first interest-free and no-annual-fee credit card in Mexico, designed to simplify personal finances and give users complete control — all from a mobile app. With NOVACARD, users can access up to $200,000 MXN in credit, only pay when they use it, and manage everything digitally in under 5 minutes. Our mission is to empower people to make smarter financial decisions by offering flexibility, transparency, and the freedom they need to reach their goals. Simple finances, big goals. About the Role: We are looking for a Middle .NET Developer to join the Engagement team. You will be responsible for API development, integration with external and internal systems, database design, and performance optimization. This is an active engineering role with a focus on backend architecture, system scalability, and clean code. Key Responsibilities: Develop and maintain backend services and APIs for integration with internal and external systems Develop and maintain existing solutions Design and optimize relational database structures Analyze software performance and optimize backend code and database queries Participate in system architecture design Work closely with analysts and other teams to deliver tasks Ensure code quality, maintainability, and adherence to engineering practices What We Expect: English proficiency at B2 or higher (confident reading of technical documentation and working communication) Commercial experience developing distributed systems in C# Deep understanding of distributed systems patterns Experience with generic programming and building reusable components Excellent SQL knowledge and ability to write complex queries Hands-on experience integrating with external APIs (JSON-based) Commercial experience with Docker Knowledge of SOLID principles, event delivery guarantees, and EDA (Event-Driven Architecture) Understanding of information security fundamentals (network security and web application security) Experience with collaborative development using Git Nice to Have: Production experience with Kubernetes (K8s) Experience setting up CI/CD pipelines using Ansible, Terraform, etc. Knowledge of DevOps practices and Infrastructure as Code principles Experience with message brokers (Kafka, RabbitMQ) Experience in banking, fintech, or e-commerce products Understanding of microservices architecture principles What We Offer: Fully remote work format Opportunity to work in an international team on a large-scale financial product A data-driven environment where your contributions have a real impact