Sr Developer –.Net Core 9 - Full Stack

TransUnion; Chennai District; Hybrid; INR 1,800,000 - 3,000,000; Full time

Job summary

TransUnion is seeking a Senior Developer to design, build and optimize backend services in a microservice architecture. You will work with .NET 9.0+, RESTful APIs and OAuth2 security, while coordinating with cloud and product teams to deliver scalable platform capabilities.

The role requires strong patterns, clean code, and focus on performance, debugging, and production support in a hybrid office setup.

Qualifications

• Experience building backend services with .NET 9.0+ and microservices.
• Strong knowledge of RESTful API design and security (OAuth2/JWT).
• Hands-on work with SQL Server, Entity Framework, and LINQ.
• Familiarity with cloud platforms and containerization tooling.

Responsibilities

• Design, develop, and optimize core backend services using .NET 9.0+.
• Architect and implement microservices following SOLID and patterns.
• Build secure RESTful services with OAuth2-based auth.
• Develop data access layers with SQL Server & EF.
• Collaborate with architects, product owners, and cloud teams.
• Write clean, maintainable, testable code; support debugging.
• Assist performance tuning and production troubleshooting.

Skills

.NET 9.0+ and above

Microservices Architecture

SOLID Principles

OAuth2

JWT authentication

Azure DevOps

Jenkins

Harness

GCP

AWS

Docker

Kubernetes

Java

Frontend basics

Tools

Docker

Kubernetes

Azure DevOps

Jenkins

Harness

GCP

AWS

Job description

TransUnion Job Title: Sr Developer, Applications Programming

TransUnion's Job Applicant Privacy Notice Team Overview Seeking a Senior Developer that will operate as a member of a core team of specialists that are responsible for the delivery of complex enterprise level services leveraging the principles of a microservice architecture, and deployed using Kubernetes both on premise and off premise multi-cloud (AWS and Azure). This is a hybrid position and involves regular performance of job responsibilities virtually as well as in-person at an assigned TU office location for a minimum of two days a week.

Role Overview And Core Responsibilities

Responsibilities: Design, develop, and optimize core backend services using .NET 9.0 and above. Architect and implement microservices following SOLID principles and standard design patterns. Develop secure RESTful services, integrating OAuth2-based authentication & authorization. Build efficient data access layers using SQL Server and Entity Framework. Collaborate closely with architects, product owners, and cloud engineering teams to deliver robust platform capabilities. Write clean, maintainable, testable code following industry best practices. Support performance optimization, debugging, and production troubleshooting.

Skills

Strong hands‑on experience with .NET 9.0 and above Design Patterns, Microservices Architecture, SOLID Principles Database: SQL, Entity Framework and LINQ, performance tuning Security: OAuth2, JWT‑based authentication Experience in setting up pipelines(Azure DevOps/Jenkins/Harness) --- Secondary Cloud Technologies(GCP/AWS) and Containerization - Docker & Kubernetes --- Secondary Flexible and quick to adapt to new technologies(JAVA/FrontEnd) based on project requirements.

Required Knowledge And Experiences Who We Are: At TransUnion, we are dedicated to finding ways information can be used to help people make better and smarter decisions. As a trusted provider of global information solutions, our mission is to help people around the world access the opportunities that lead to a higher quality of life, by helping organizations optimize their risk‑based decisions and enabling consumers to understand and manage their personal information. Because when people have access to more complete and multidimensional information, they can make more informed decisions and achieve great things. Every day TransUnion offers our employees the tools and resources they need to find ways information can be used in diverse ways. Whether it is helping businesses better manage risk, providing better insights so a consumer can qualify for his first mortgage or working with law enforcement to make neighborhoods safer, we are improving the quality of life for individuals, families, communities and local economies around the world.

We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, age, disability status, veteran status, marital status, citizenship status, sexual orientation, gender identity or any other characteristic protected by law.

TransUnion Overview

At TransUnion, we encourage and are committed to creating a real, positive impact and shared sense of purpose within our Workforce for Good, which empowers our people to grow, innovate and contribute to a better future for our communities and customers. We strive to build an environment where our associates are in the driver’s seat of their professional development— while having access to help along the way. We recognize that success comes when our associates thrive both professionally and personally; that’s why we prioritize work/life flexibility and offer resources for our teams across the globe to collaborate and drive excellence. Be a part of our Workforce for Good – you’ll work with great people, pioneering products and cutting‑edge technology.

We call this Information for Good® — and it leads to economic opportunity, great experiences and personal empowerment for millions of people around the world.

TransUnion is a global information and insights company with over 12,000 associates operating in more than 30 countries. We make trust possible by ensuring each person is reliably represented in the marketplace. We do this with a Tru™ picture of each person: an actionable view of consumers, stewarded with care. Through our acquisitions and technology investments we have developed innovative solutions that extend beyond our strong foundation in core credit into areas such as marketing, fraud, risk and advanced analytics. As a result, consumers and businesses can transact with confidence and achieve great things. We call this Information for Good® — and it leads to economic opportunity, great experiences and personal empowerment for millions of people around the world.