Back End Developer

Software Development Engineer Backend

Location: Gurgaon (On-site)

At CapitalXB, we are building the financial infrastructure that powers Indias rapidly growing cross-border trade ecosystem.

We are an RBI-registered NBFC with an AD Category III license, focused on solving one of the biggest problems for global MSME exporters access to working capital.

Our mission is to build technology-driven, AI-enabled financial systems that make cross-border trade faster, simpler, and more accessible.

If you enjoy solving complex engineering problems, building high-scale backend systems, and shipping real-world fintech products, wed love to talk.

The Role

Were looking for a Backend Engineer who enjoys building scalable systems.

You will design and develop the core backend infrastructure that powers our fintech platform from high-performance APIs to AI-enabled workflows.

This is a high-ownership role where you will work closely with product, AI/ML, and frontend teams to build reliable and scalable backend systems.

Key Result Areas (KRAs)

• Build scalable and reliable backend systems and APIs
• Own backend services end-to-end from design to production support
• Enable AI-driven product capabilities through backend services
• Ensure performance, security, and scalability of backend systems
• Collaborate closely with frontend, AI, and product teams

Key Responsibilities

• Design, develop, and maintain backend services using Python
• Build high-performance APIs using FastAPI
• Design and implement RESTful APIs for frontend applications
• Integrate AI-driven workflows and backend orchestration
• Implement authentication, authorization, and RBAC
• Manage asynchronous processing and background task execution
• Design backend architecture with scalability and fault tolerance
• Write clean, testable, and well-documented code
• Implement unit and integration tests
• Deploy and manage backend services on AWS
• Monitor production systems and resolve performance issues
• Participate in system design discussions and code reviews

Required Skills & Qualifications

• Strong proficiency in Python backend development
• Hands-on experience with FastAPI
• Experience designing and building REST APIs
• Good understanding of asynchronous programming
• Experience integrating AI/ML workflows or intelligent automation
• Knowledge of authentication, authorization, and security best practices
• Familiarity with AWS cloud services
• Experience writing unit and integration tests
• Strong problem-solving skills and ability to work in Agile teams

Tech Stack

• Python
• FastAPI
• AWS
• REST APIs
• Async Processing
• AI/ML integrations

How to Apply

If this role interests you, please share your updated resume at:

siddharth.sharma@celerity-consulting.com

Subject Line: Application Backend Software Development Engineer (CapitalXB)