Full Stack developer(.Net React js)

Full Stack Engineer (SDE-2) Experience: 8–11 Years Location: Chennai. Work Days: Monday to Friday Working Hours: 1:00 PM – 10:00 PM Employment Type: Full-Time Position Overview Digiclarity is looking for an experienced Full Stack Engineer (SDE-2) with 8–11 years of hands-on experience in building scalable, secure, and high-performance web applications. The ideal candidate should have strong expertise in React, TypeScript, JavaScript, C#/.NET Core, REST APIs, and PostgreSQL . You will take end-to-end ownership of features , working across the frontend, backend, database, and asynchronous workflows. You will contribute to healthcare-focused, high-availability web applications while working closely with Product, Design, QA, and Engineering teams. The role requires strong practical problem-solving skills, understanding of SaaS architecture, secure development practices, performance optimization, and modern software development methodologies. Key Responsibilities • Develop and deliver end-to-end features using React, TypeScript, JavaScript, C#/.NET Core, and PostgreSQL . • Build responsive and accessible Single Page Applications (SPAs) with secure authentication, forms, routing, and reusable components. • Design and maintain scalable REST APIs , including consistent authentication, pagination, validation, and error-handling contracts. • Implement backend services using C#/.NET Core, Dependency Injection, and asynchronous programming . • Work with PostgreSQL for complex joins, transactions, query optimization, and safe concurrent data operations. • Build secure multi-tenant SaaS applications , ensuring proper tenant-level data isolation and access control. • Develop secure payment integrations, including checkout flows and reliable webhook processing with idempotency and retry handling. • Identify and resolve performance issues such as N+1 queries, slow database operations, large payloads, and API latency . • Implement observability using structured logging, metrics, tracing, dashboards, and alerts to improve system reliability. • Contribute to High-Level Design (HLD) and Low-Level Design (LLD) , including scalable SaaS architecture and reusable design patterns. • Write automated tests, perform code reviews, and maintain clean, secure, and maintainable code. • Follow spec-driven development and use AI coding assistants responsibly while maintaining complete ownership of code quality, security, and correctness. • Work with Docker, AWS, Git, and CI/CD pipelines to support reliable application delivery. Required Skills & Qualifications • 8+ years of professional experience developing production-grade web applications. • Strong hands-on experience with React, TypeScript, and JavaScript (ES6+) . • Strong knowledge of C# and .NET Core / ASP.NET Core . • Experience developing REST APIs, asynchronous services, and dependency-injected applications . • Strong hands-on experience with PostgreSQL , including joins, transactions, query optimization, and concurrent operations. • Experience working with multi-tenant SaaS applications and sensitive data. • Strong debugging and problem-solving skills across frontend, backend, and database layers. • Experience with Git, CI/CD, Docker, and AWS/cloud infrastructure . • Good understanding of HLD, LLD, data structures, design patterns, and system scalability . • Ability to analyze and resolve production performance issues. Nice to Have • Experience in healthcare, patient billing, insurance, or revenue cycle management . • Experience with payment processors, webhooks, real-time updates, or message-based background workers. • Exposure to AI-assisted development, LLM-based coding tools, and spec-driven engineering workflows . • Experience designing systems for high availability, horizontal scaling, and large multi-tenant workloads. Ideal Candidate We are looking for a hands-on engineer who can think across the complete technology stack , solve complex technical problems, make sound design decisions, and take ownership from requirements through production. Strong coding ability in React and C# , along with practical database and system-design knowledge, is essential.