Senior Back-End Developer for a fintech company developing data-oriented scalable solutions. Focus on C# and .NET, leading technical decisions and mentoring juniors in a high-availability environment.
Responsibilities
Lead technical aspects of complex projects, supporting architectural decisions and mentoring junior and mid-level developers.
Conduct thorough code reviews, ensuring high standards of quality, security and efficiency.
Propose and implement structural improvements in architecture, performance and resilience.
Apply Clean Architecture, Hexagonal Architecture and Domain-Driven Design (DDD) to ensure modularity and scalability.
Develop and maintain robust, scalable APIs oriented to microservices.
Implement asynchronous communication, messaging and event-driven architecture (Kafka, RabbitMQ, EventHub).
Use resilience patterns such as Circuit Breaker, Retry, Timeout and Bulkhead to ensure availability in failure scenarios.
Build end-to-end CI/CD pipelines with a focus on automation, testing, governance and security.
Work with monitoring, telemetry and observability using tools such as Datadog, Prometheus, Grafana and OpenTelemetry.
Employ AI-assisted development tools, including Cursor IDE, GitHub Copilot and intelligent automations to increase productivity.
Model and perform tuning of SQL and NoSQL databases, analyzing performance and integrity.
Collaborate with Product, Architecture, DevOps, Cloud and Security teams in strategic decision-making.
Requirements
Strong command of C# and .NET.
Practical proficiency in Domain-Driven Design (DDD), SOLID principles and Clean Code practices.
Experience with Clean Architecture and Hexagonal Architecture.
Experience with microservices, messaging and distributed events.
Advanced knowledge of resilience patterns:
Circuit Breaker (Polly or equivalent)
Retry
Timeout
Fallback
Bulkhead
Experience with unit testing, automated tests, mocks, integration and contract testing.
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