Senior .Net Lead Developer

Job Title: Senior .Net Lead Developer

Location: Chennai, India (5 days a week from office)

Job Type: Full time

Experience 4 to 10 Years

Job Description:  

·       Design, develop, and maintain .NET Core based APIs and microservices as part of a large-scale UI Modernization and digital transformation program.

·       Build scalable, secure, and high-performance backend services that integrate seamlessly with modern UI applications and external systems.

·       Develop and expose APIs using REST and GraphQL, ensuring consistency, performance, and backward compatibility.

·       Apply secure coding practices and enterprise standards to protect data, APIs, and services in regulated environments.

·       Collaborate closely with UI (Angular), UX, DevOps, QA, and product teams to translate business requirements into robust backend solutions.

·       Leverage AI-powered development tools to improve productivity, code quality, documentation, and unit test coverage.

·       Participate in CI/CD pipeline implementation, automated testing, and deployment activities across environments.

Job Specific needs & Responsibilities: 

·       Skill Things to Check During Interview Proficiency (SFIA Level)

·       .NET Development Strong experience with .NET Core / .NET 6+, C#, async programming, dependency injection, clean code principles Level 4

·       API & Microservices Design Microservices architecture, API layering, stateless services, versioning, service contracts Level 4

·       REST API Development RESTful principles, HTTP methods, status codes, pagination, error handling, OpenAPI/Swagger Level 4

·       GraphQL Schema design, queries/mutations, resolvers, performance optimization, security considerations Level 3–4

·       Secure Coding Practices OWASP Top 10, input validation, authentication/authorization, token-based security (OAuth2, JWT) Level 4

·       Data Access Entity Framework Core, SQL/NoSQL basics, transaction handling, performance tuning Level 3–4

·       Unit & Integration Testing xUnit/NUnit, Moq, test data setup, API and service-level testing Level 4

·       CI/CD Practices Build and release pipelines, automated tests, environment promotion, artifact management Level 4

·       DevOps & Tooling Git, branching strategies, build tools, container basics (Docker), deployment automation Level 3–4

·       AI-Assisted Development Use of AI tools for code generation, refactoring, documentation, and test case creation Level 3–4

Sonata Software Overview

In today's market, there is a unique duality in technology adoption. On one side, extreme focus on cost containment by clients, and on the other, deep motivation to modernize their Digital storefronts to attract more consumers and B2B customers.

As a leading Modernization Engineering company, we aim to deliver modernization-driven hypergrowth for our clients based on the deep differentiation we have created in Modernization Engineering, powered by our Lightening suite and 16-step Platformation™ playbook. In addition, we bring agility and systems thinking to accelerate time to market for our clients.

Headquartered in Bengaluru, India, Sonata has a strong global presence, including key regions in the US, UK, Europe, APAC, and ANZ. We are a trusted partner of world-leading companies in BFSI (Banking, Financial Services, and Insurance), HLS (Healthcare and Lifesciences), TMT (Telecom, Media, and Technology), Retail & CPG, and Manufacturing space. Our bouquet of Modernization Engineering Services cuts across Cloud, Data, Dynamics, Contact Centers, and around newer technologies like Generative AI, MS Fabric, and other modernization platforms.

Why join Sonata Software?

At Sonata, you´ll have an outstanding opportunity. The chance to use your skills and imagination to push the boundaries of what´s possible. To build never seen before solutions to some of the world’s toughest problems. You´ll be challenged, but you will not be alone. You´ll be joining a team of diverse innovators, all driven to go beyond the status quo to craft what comes next.

• Sonata Software is an Equal Opportunity Employer encouraging diversity in the workplace. All qualified applicants will receive consideration for employment without regard to race, national origin, gender identity, age, religion, disability, sexual orientation, veteran status, marital status, or any other characteristics protected by law.