Backend Developer – Serverless & Cloud Infrastructure (LOS Systems)

Mufin Green Finance

New Delhi, Delhi, India

Backend Developer – Serverless & Cloud Infrastructure (LOS Systems)Experience: 3–5 years | Function: Engineering – Lending / Loan Origination Systems

About the RoleWe're looking for a backend engineer to build and maintain services for our Loan Origination System (LOS) — someone equally comfortable writing serverless code and reverse-engineering undocumented legacy systems, while working directly with senior management to deliver solutions fast.

Key Responsibilities• Build and maintain backend services for LOS workflows: application intake, underwriting, disbursement, and loan lifecycle APIs

Design and develop backends using both .NET/C# and Node.js/TypeScript, depending on the service
Design and deploy serverless applications on AWS (Lambda, API Gateway, Step Functions)
Reverse-engineer existing modules with little/no documentation and rebuild functional understanding from scratch
Automate manual processes (reconciliation, reporting, batch jobs) via scripting/serverless functions
Provision and manage AWS infrastructure (Lambda, RDS, S3, IAM, CloudWatch, SQS/SNS)
Own deployment of small applications end-to-end, and work directly with senior stakeholders on ambiguous, fast-turnaround requirements

Required Skills• 3–5 years backend/service-side development experience

Strong hands-on experience in .NET (latest version) / C# for backend development
Strong TypeScript, with hands-on experience writing serverless backends on Node.js
Hands-on AWS experience: Lambda, API Gateway, RDS, S3, IAM, CloudWatch, SQS/SNS
Proven experience reverse-engineering systems and debugging across services/integrations
Strong analytical skills and comfort working directly with senior management under ambiguity

Good to Have• LOS/lending domain exposure: credit bureau APIs, KYC/e-KYC, e-NACH, disbursement workflows

Familiarity with RBI/NBFC compliance norms (KYC Master Direction, data localization)
PostgreSQL experience; event-driven architecture (SQS/EventBridge)

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