Sr Dev - RESTful APIs and web services

Zensar; Pune District; Hybrid; INR 1,200,000 - 2,200,000; Full time

Job summary

Zensar in Pune, India, seeks a Senior Software Developer to design, build and integrate REST APIs and web applications using the .NET framework. You will own API design and integration architecture, mentor juniors, and ensure secure, scalable services for internal and partner systems.

Requirements include 4+ years in software dev, strong C#, ASP.NET, SQL Server, and experience with REST, Swagger/OpenAPI, and SOAP-based services.

Qualifications

• Minimum of 4 years of software development experience with REST APIs.
• Graduate in CS/IT preferred; other degrees acceptable with 4 years relevant exp.
• Strong knowledge of .NET, C#, and SQL Server.
• Experience with SOAP-based services is a plus.

Responsibilities

• Lead design, development and maintenance of RESTful APIs and web services.
• Collaborate with cross-functional teams to define API contracts.
• Own integrations with SOAP-based legacy/partner systems where applicable.
• Perform testing and code reviews to ensure quality and security.
• Mentor junior developers and provide task estimates.
• Prepare API documentation with Swagger/OpenAPI.

Skills

REST API design

ASP.NET

C#

Entity Framework

SQL Server

Git

OAuth2/JWT

Education

Bachelor’s in CS/IT

Alternative degree with 4+ years exp

Tools

Swagger/OpenAPI

Postman

Git

SVN

Angular

Job description

The successful candidate will be able to own a REST API or integration requirement end-to-end - from business understanding through API design, development, integration (including SOAP-based partner systems where needed), testing, code review and deployment - mentoring the team along the way and ensuring the resulting APIs are secure, performant and easy for other applications to consume.

Role & responsibilities

As a Senior Software Developer, you shall be part of an exciting and rapidly expanding team responsible for designing, building and integrating REST APIs and web applications that put our clients' vision into reality. Your primary role would be software development in the .NET framework, with ownership of REST API design and integration architecture.

• Lead the design, development and maintenance of scalable, secure RESTful APIs and web services that power internal applications and external/partner integrations.
• Collaborate with cross-functional teams, including TPM's, BA's and developers, to understand business requirements and define API contracts, adhering to coding standards and best practices.
• Own integrations with third-party and partner REST APIs (and SOAP-based legacy/partner services where applicable) for supplier, GDS and payment-related data feeds.
• Completion of the assigned tasks within the agreed timescale with high reliability and minimal functional and technical defects.
• May be assigned to work within a development team or alone.
• Must be self-reliant in completion of advanced fault finding, debugging and performance tuning of applications and API integrations.
• Design and develop new applications, as well as enhancements to existing applications and APIs.
• Conduct thorough testing (including API/unit/integration testing) to ensure application and API functionality, security and stability.
• Provide technical support to resolve issues related to developed applications and integrations.
• Create and maintain technical and API documentation (e.g., Swagger/OpenAPI) throughout the software development life cycle.
• Conduct code reviews with a focus on API design quality and security, and work as a mentor to junior developers.
• Provide task estimates to the TPM/Lead.
• Work on moderately to highly complex tasks, including integration with SOAP-based legacy or partner systems where required.

REST API / Web Services

• Hands-on experience designing, building and consuming RESTful APIs/web services (primary requirement).
• Experience with ASP.NET (Web API/MVC) to build scalable APIs and web applications.
• Good understanding of API design principles - HTTP verbs, status codes, JSON, authentication (OAuth2/JWT/API keys) and versioning.
• Familiarity with API documentation and testing tools such as Swagger/OpenAPI and Postman.

.NET Development

• Solid understanding and strong proficiency in C# and the .NET Framework/.NET Core.
• Solid understanding of Entity Framework and fluent in writing LINQ Queries.
• Proficiency in writing efficient, secure, and well-documented code.
• Knowledge of code versioning systems, preferably SVN/Git.
• Familiarity with front-end technologies such as HTML, CSS, and JavaScript.

Preferred Skills

• Exposure to SOAP-based web services.
• Working knowledge of SQL and relational database concepts (writing queries, joins, basic stored procedures), preferably Microsoft SQL Server.
• Knowledge or experience working with Angular JS/Angular.
• Staying updated on industry trends and advancements in API and .NET development.

Preferred candidate profile

Experience Required

• Minimum of 4 years of experience in software development, with substantial hands-on experience designing and developing REST APIs.

Qualifications Required

• Graduate in Computer Science or IT Engineering fields preferred.
• Graduate in other field of studies with a minimum of 4 years of relevant experience.

Key Competencies

• Excellent problem-solving, analytical and debugging skills with the ability to think critically.
• Having keen attention to facts and be able to catch errors and bugs before they become a problem.
• Strong communication, interpersonal skills and collaboration abilities to work effectively within a team.
• Ability to mentor and guide junior developers.
• Strong ownership and delivery focus.
• Ability to learn and adapt to new technologies and frameworks.