Job Summary: Develop and maintain high-performance, scalable, and secure .NET back-end services, collaborating with product teams and participating in code reviews. Key Highlights: 1. High-performance and secure back-end .NET service development 2. Integration with payment APIs and development of reconciliation modules 3. Team collaboration and participation in architecture definition Software Engineer (.NET) Your Responsibilities: Develop and maintain .NET (Core and/or Framework) back-end services, focusing on high performance, scalability, and security Implement integrations with acquirer APIs, payment gateways, card networks, and processors Build financial and transaction reconciliation modules, both front-end (capture and processing) and back-end (settlement and clearing) Ensure data integrity and transaction consistency across the entire acquisition flow Collaborate with product, quality assurance, and infrastructure teams to deliver robust solutions aligned with regulatory and business requirements Participate in code reviews, architecture definition, and software development best practices **What We Expect From You:** Bachelor’s degree in Computer Science, Software Engineering, Information Systems, or related fields 5+ years of back-end development experience with C# and .NET Core or .NET Framework Experience with design patterns Experience with agile methodologies Experience with serverless architecture Experience with messaging systems (Kafka, Amazon SQS, Amazon SNS, RabbitMQ) Knowledge of microservices architecture Knowledge of REST APIs and version control tools (Git) Cloud knowledge (preferably AWS) Experience with NoSQL and/or SQL databases (SQL Server, PostgreSQL, MongoDB) Knowledge of containerization (Docker and/or Kubernetes) and CI/CD pipelines **Payment Methods Experience:** Understanding of payment system operations, including authorization, capture, settlement, and reconciliation processes **Acquiring Experience:** Familiarity with card transaction flows, from transaction capture at the merchant to settlement with the issuing bank **Complex Project Experience:** Proven track record of managing and developing complex, high-demand systems with stringent security requirements Hybrid work availability: 3 days per week at Av. Paulista Conversational English Nice-to-Have: Knowledge of payment industry-specific regulations, such as PCI DSS (Payment Card Industry Data Security Standard)