Senior Backend Engineer (Python or C#) at CapitalSage Technology Limited

We are looking for experienced Senior Backend Engineers to design, build, and scale highly available financial services platforms. The ideal candidate must have strong experience in microservices architecture, distributed systems, API development, and high-volume transaction processing within FinTech, Banking, Payments, or related industries.

Key Responsibilities

• Design, develop, and maintain scalable backend services and APIs.
• Build and manage microservices-based architectures.
• Develop secure and high-performance financial transaction systems.
• Collaborate with product, mobile, frontend, QA, and DevOps teams.
• Implement automated testing, CI/CD, and observability best practices.
• Optimize application performance, reliability, and scalability.
• Participate in architecture reviews and technical decision-making.
• Mentor junior and mid-level engineers.

Technical Requirements

Python Track

Strong experience with:

• Python
• Django and/or FastAPI
• Django REST Framework
• Celery

C# Track

Strong experience with:

• C#
• .NET 8/9/10
• ASP.NET Core
• Entity Framework Core

Core Requirements (Both Tracks)

• Strong understanding of Microservices Architecture.
• Strong understanding of system design
• REST API and Event-Driven Architecture experience.
• PostgreSQL or other enterprise SQL databases.
• RabbitMQ and/or Apache Kafka.
• Docker and containerization.
• CI/CD pipelines and Git workflows.
• Test-Driven Development (TDD).
• Caching technologies (Redis preferred).
• Authentication and authorization (JWT, OAuth2, OpenID Connect).
• API security and secure coding practices.
• Cloud platform experience (AWS, GCP, or Azure).

Qualifications

• B.Eng/B.Sc in Computer Science, Computer Engineering, Electrical & Electronics Engineering, or related discipline.
• Minimum of 5 years backend engineering experience.
• FinTech, Banking, Payments, Digital Banking, Core Banking, or Financial Services experience is highly preferred.