Lead Software Engineer - C# / .NET

Working at Tech Holding isn't just a job, it's an opportunity to be a part of something bigger. We are a full-service consulting firm that was founded on the premise of delivering predictable outcomes and high-quality solutions to our clients.  Our founders and team members have industry experience and have held senior positions in a wide variety of companies – from emerging startups to large Fortune 50 firms – and we have taken our combined experiences and developed a unique approach that is supported by the principles of deep expertise, integrity, transparency, and dependability.

We’re seeking a hands-on Lead Software Engineer to drive application modernization, legacy-codebase stabilization, service/API extraction, and secure integration initiatives. The role combines deep expertise in C#/.NET, Angular, and SQL Server with modern integration engineering using TypeScript/Node.js, gRPC/Protocol Buffers, PostgreSQL, and Microsoft Azure. You will lead integration development and guide architecture decisions, code reviews, and the reliability, security, and maintainability of existing systems.
Experience: 8+ Years

• →Lead the design, development, modernization, and maintenance of enterprise applications using C#/.NET and Angular.
• →Stabilize legacy codebases by addressing technical debt, reliability, performance, and maintainability.
• →Design and implement service/API extraction strategies to decouple legacy applications into well-defined, maintainable services.
• →Design secure integrations between existing platforms and external systems, covering authentication, authorization, data protection, and error handling.
• →Develop and optimize SQL Server queries, stored procedures, and application data-access layers.
• →Lead integration development using TypeScript/Node.js and modern API architectures.
• →Design and implement service-to-service communication using gRPC and Protocol Buffers.
• →Build and maintain PostgreSQL-backed integrations.
• →Build, deploy, and support integration components on Microsoft Azure.
• →Define API contracts, integration patterns, error-handling approaches, observability, and security standards.
• →Troubleshoot complex application, cross-service, and data consistency issues and drive root-cause analysis to resolution.
• →Lead architecture discussions, technical design reviews, and code reviews; establish coding standards, testing practices, and reusable development patterns.
• →Collaborate with product owners, architects, and engineering teams to turn business requirements into scalable technical solutions.
• →Mentor engineers and support delivery planning and estimation.

• Experience building and maintaining enterprise web applications using Angular.
• Strong SQL Server skills, including stored procedures, query optimization, and database troubleshooting.
• Proven experience stabilizing, refactoring, and improving existing enterprise applications.
• Experience extracting services from monolithic or legacy systems and designing maintainable APIs.
• Solid understanding of secure service communication, authentication, authorization, and data protection.
• Strong hands-on development experience with TypeScript/Node.js.
• Expertise in API design: RESTful APIs, service contracts, integration patterns, and versioning.
• Practical experience designing or implementing gRPC services and Protobuf contracts.
• Experience with PostgreSQL, including schema design, SQL, query optimization, and application integration.
• Experience deploying, integrating, and supporting application services on Microsoft Azure.
• Strong grasp of design patterns, clean code, testing, debugging, and version control (Git).
• Ability to lead design discussions, run architecture and code reviews, and mentor engineers.