Senior Software Engineer – Core Product

About the role

The Senior Engineer – Core Product will design, develop, and maintain the backend services that power our Direct Issuing Platform. You will build scalable, secure, high‑performance systems for card issuing, transaction processing, and payment‑network integrations. The role requires hands‑on work with Java Spring Boot or .NET and close collaboration with cross‑functional teams.

Key responsibilities

• Develop and maintain backend services and APIs using Java Spring Boot or .NET (C#).
• Design and implement scalable microservices and backend modules.
• Collaborate with Core Backend Lead, API Lead, and Integration Lead to ensure cohesive platform delivery.
• Ensure backend systems meet performance, reliability, and security benchmarks.
• Write clean, testable, and maintainable code following best practices.
• Participate in code reviews, unit testing, and integration testing.
• Troubleshoot and resolve complex technical issues.
• Contribute to CI/CD pipeline improvements and automation initiatives.
• Work closely with product managers and stakeholders to understand requirements and deliver solutions.
• Follow Agile development practices and participate in sprint ceremonies.
• Maintain documentation and support knowledge sharing across the team.

Required profile

• Bachelor’s degree in Computer Science or a related field.
• Minimum 5 years of experience in backend development.
• Strong proficiency in either Java (Spring Boot) or .NET (C#).
• Experience building RESTful APIs and microservices in high‑scale environments.
• Familiarity with asynchronous messaging systems such as Kafka or RabbitMQ.
• Solid understanding of relational databases, especially Microsoft SQL Server; experience with PostgreSQL or MongoDB is a plus.
• Experience with containerization (Docker), orchestration (Kubernetes), and cloud platforms (Azure, AWS, GCP).
• Knowledge of secure coding practices and API security (OAuth2, JWT).
• Experience with CI/CD pipelines and Git workflows.
• Familiarity with Agile methodologies and tools (JIRA, Confluence, Bitbucket).

Required skills

• Java (Spring Boot)
• .NET (C#)
• RESTful API development
• Microservices architecture
• Kafka
• RabbitMQ
• Microsoft SQL Server
• PostgreSQL
• MongoDB
• Docker
• Kubernetes
• Azure
• AWS
• GCP
• OAuth2
• JWT
• CI/CD pipelines
• Git
• JIRA
• Confluence
• Bitbucket