Hybrid Senior Back-End Developer – .NET

Posted last month

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About the role

  • 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.
  • Advanced CI/CD with automated pipelines (Azure DevOps, GitHub Actions, GitLab CI, etc.).
  • Solid knowledge of containers and orchestration (Docker, Kubernetes).
  • Monitoring, structured logging and observability with Datadog, Prometheus, OpenTelemetry.
  • Experience with generative AI tools for development (Cursor, Copilot, ChatGPT).
  • Cloud (AWS or Azure) – intermediate level or higher.
  • Modeling and tuning of SQL and NoSQL databases.
  • Advanced versioning (Git, GitFlow or trunk-based development).

Benefits

  • Flexible CAJU Benefits Card – usable for food, meal, transportation and other allowances.
  • Health insurance (Bradesco).
  • Dental insurance (Bradesco).
  • Life insurance.
  • Education incentive programs.
  • English course — English Pass (partnership available to all DM employees).
  • Wellhub access for fitness and wellness activities.
  • DM VISA card with pre-approved credit limit.
  • Day off on your birthday — a gift from DM!
  • PPR (Profit Sharing Program).
  • For parents: childcare allowance for children up to 6 years old.
  • For parents: extended parental leave — 6 months for mothers and 20 days for fathers.

Job title

Senior Back-End Developer – .NET

Job type

Experience level

Senior

Salary

Not specified

Degree requirement

No Education Requirement

Location requirements

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