Senior Software Engineer (.NET)

Position overview

Application development

• Architect, develop, and maintain applications using .NET 6+, C#, ASP.NET Core, and modern frameworks.
• Build RESTful APIs, microservices, messaging components, and background workers.
• Modernize legacy VB.NET and older .NET Framework applications.
• Apply SOLID, DDD, dependency injection, asynchronous programming, and clean architecture patterns.
• Write secure, testable, and performant code.

Technical leadership

• Lead complex development initiatives with autonomy and technical ownership.
• Guide architecture, code quality, performance optimization, and maintainability.
• Conduct code reviews, mentor developers, and anticipate technical risks.
• Contribute to internal frameworks, shared libraries, engineering standards, documentation, and workshops.

Collaboration and delivery

• Partner with Product Managers on requirements, roadmap impacts, and technical feasibility.
• Collaborate with QA on automated testing, shift-left quality, and reliability.
• Work with DevOps on CI/CD pipelines, deployment workflows, infrastructure as code, and cloud readiness.
• Support Delivery Management by identifying risks, dependencies, and technical constraints.

Database and integration engineering

• Design and optimize SQL Server structures, stored procedures, views, indexes, and queries.
• Perform database performance tuning, index analysis, query plan evaluation, and workload optimization.
• Integrate applications through REST APIs, event streams, message queues, file exchanges, and service buses.
• Collaborate on capacity planning, schema design, data governance, and secure data access.

Performance, security, and observability

• Perform performance profiling, memory optimization, and load testing.
• Implement OWASP-aligned secure coding and least-privilege practices.
• Build observable systems with structured logging, metrics, distributed tracing, and robust error handling.

Required qualifications

• 5+ years of professional experience with the modern .NET ecosystem.
• Strong expertise in C#, .NET 6+, ASP.NET Core, Web API, LINQ, and object-oriented design.
• Experience maintaining or migrating legacy VB.NET or .NET Framework applications.
• Experience with REST APIs, microservices, modular, or distributed architectures.
• Strong SQL Server knowledge, including data modeling, query optimization, and performance tuning.
• Proficiency with Git, CI/CD pipelines, and automated deployment workflows.
• Experience working in Agile Scrum or Kanban environments.

Preferred qualifications

• Experience with cloud platforms, ideally Microsoft Azure.
• Experience with Docker, containers, and Kubernetes or AKS.
• Knowledge of DDD, event-driven architecture, and messaging patterns.
• Exposure to React, Angular, or Blazor.
• Bachelor's degree in Computer Science, Engineering, or a related field, or equivalent practical experience.

About LSEG