Job Description

Job Title:

Experience:

5-6 Years

Location:

Mumbai

Employment Type:

Full-Time

Job Summary:

We are looking for a highly skilled

.NET Backend Developer

with 5-6 years of hands-on experience in backend system development. The ideal candidate will have strong expertise in

API creation

,

integration with external SDKs and APIs

,

third-party device communication

,

token-based authentication

, and

relational databases

. You will be part of a dynamic team responsible for building secure, scalable, and high-performance backend systems.

Key Responsibilities:

Design, develop, and maintain scalable

RESTful APIs

using

.NET / .NET Core

. Implement

authentication and authorization

using

JWT

, OAuth2, or similar token-based mechanisms. Integrate with external

SDKs, APIs

, and

third-party hardware/devices

(e.g., biometric devices, scanners, payment terminals). Work with relational databases like

SQL Server

, write complex queries, stored procedures, and optimize performance. Ensure high standards of code quality through unit testing, code reviews, and adherence to best practices. Collaborate closely with cross-functional teams (frontend, QA, DevOps) to deliver complete solutions. Monitor, troubleshoot, and resolve backend performance and integration issues. Document APIs, workflows, and integration guides using Swagger or similar tools.

Required Skills:

Languages & Frameworks:

C#, .NET / .NET Core (v3.1+ or later)

API Development:

RESTful services, Web API, Swagger/OpenAPI

Authentication & Security:

JWT, OAuth2, token-based auth flows, API security best practices

Integrations:

Experience integrating with

external APIs

,

SDKs

, and

third-party devices

Databases:

Strong knowledge of

SQL Server

, data modeling, T-SQL, indexing, and performance tuning

Version Control:

Git (GitHub, GitLab, Bitbucket)

Testing & Debugging:

Postman, Fiddler, unit testing frameworks (xUnit/NUnit)

Preferred / Nice to Have:

Experience with

message queues

(e.g., RabbitMQ, Kafka) Knowledge of

asynchronous programming

and

parallel processing

Exposure to

Azure/AWS

cloud services Experience with

CI/CD pipelines

and

DevOps practices

* Familiarity with

microservices architecture

and

containerization

(Docker)