Senior Lead Engineer - IT

Job Title:

Tech Lead C# / .NET & React Developer – Full Stack

Experience Required: 8-10 Years

Location: [Hybrid / Onsite]

Type: Full-Time

Role Summary:

We are seeking an accomplished Lead C# / .NET Core & React Full Stack Developer with strong expertise in microservices architecture, distributed systems, and modern front-end frameworks React. This role focused on building scalable, high-performance backend & frontend systems and enabling a cross-functional team to deliver robust full-stack solutions.

The ideal candidate is highly skilled in C# language features, .NET Core runtime capabilities, and containerized microservices, with strong experience in cloud-native development, DevOps, and code quality enforcement along with the frontend development in React & NextJS . He should Own production stability, support escalated issues, and guide root cause analysis and resolution.

Key Responsibilities

Backend Development – C# & .NET Core

• Architect and develop headless, service-oriented applications using C# and .NET Core .
• Design distributed microservices, Background Services, and Worker Services.
• Expertise on backend services with async programming & Memory management
• Build domain-centric business logic with Clean Architecture.
• Use SOLID principles, Design pattern and Command patterns for loosely coupled code.
• Preferred to have experience with event-driven workflows using message queues like (RabbitMQ, Azure Service Bus, Kafka).
• Create reusable SDK, Libraries for internal services consumption.
• Experience resolving code smells, vulnerabilities, and application security flaws.

Data & Persistence Layer

• Use Entity Framework Core and/or Dapper to implement efficient, secure data access strategies.
• Work with SQL Server, PostgreSQL, or NoSQL solutions like MongoDB or Redis.
• Optimize database performance with indexing, query tuning, and connection pooling.

Testing & Observability

• Write unit test cases for better test coverage .
• Working experience with Splunk (logging), AppDynamics, JSON/XML,  Caching, Performance Analysis & Profiling,

Cloud, DevOps, and CI/CD

• Containerize services using Docker and deploy to Kubernetes or Azure Container Apps.
• Design and maintain CI/CD pipelines with Azure DevOps, GitHub Actions, or GitLab.
• Good to have experience on IaC tools (Terraform, Bicep, ARM) to provision infrastructure.
• Experience with source code repositories tools, Bitbucket, GitHub.

Front-End Experience with React

• Hands-on knowledge and experience with developing enterprise-level web applications  with a strong focus on ReactJS
• Understanding of NextJS ,Node.js development and debugging tools
• Experience with CDD based UI development.
• Knowledge of JavaScript, CSS, HTML, and jQuery
• Experience consuming REST APIs using Fetch, Axios, etc. and asynchronous data handling
• Integrate with backend APIs using token-based auth (JWT/OAuth2).
• Implement state management via NgRx, Redux, or Context API.
• Experience with both CSR & SSR
• Experience with maintaining web vitals .

Leadership & Managerial Responsibilities

• Lead technical design discussions, define service boundaries, and maintain architecture documentation.
• Review code for quality, performance, and maintainability; enforce best practices across teams.
• Mentor team members on C#/.NET Core, system design, and debugging complex distributed systems.
• Participate in sprint planning, backlog grooming, and agile ceremonies.
• Collaborate with product managers, QA, DevOps, and stakeholders to ensure timely and high-quality delivery.

Required Skills & Experience

• 5-10 years of software development experience, with at least 3-4+ years focused on microservices in C# and .NET Core.
• Deep understanding of C# language internals, memory management, async/await, parallelism, and diagnostics.
• Experience building microservices and APIs.
• Hands-on with Docker, Kubernetes, cloud-native development (Azure, AWS).
• Expertise in unit testing, mocking frameworks, and observability tools.

Preferred Qualifications

• Experience in event-driven architectures, distributed transactions.
• Familiarity with gRPC and API versioning strategies.
• Experience working in regulated or high-security industries (e.g., finance, healthcare).

This position can be based in any of the following locations:

Current Guardian Colleagues: Please apply through the internal Jobs Hub in Workday