Lead C#/.NET Engineer — FinTech Payments & AI Cloud

Vinsari LLC; Dallas (TX); On-site; USD 140,000 - 170,000; Full time

Job summary

Vinsari LLC is seeking a Lead C#/.NET Engineer with deep experience in Corporate Payments and FinTech. You will architect and implement scalable .NET applications and microservices, deploy cloud-native solutions on AWS/Azure, and drive secure data services.

You will mentor teams, enforce CI/CD, and apply AI-assisted development tools to boost productivity. The role emphasizes hands-on coding, strong architecture leadership, and collaboration with cross-functional teams to deliver compliant,

Qualifications

• 6+ years of software engineering experience required.
• Strong hands-on experience with C# / .NET / .NET Core.
• Experience in Corporate Payments, Payments, Banking, or FinTech.
• Experience with AWS and/or Azure.
• REST APIs, Microservices & Distributed Systems.
• Unit, Integration & Automation Testing.
• Cloud Security & Compliance.
• Strong architecture and technical leadership skills.
• Experience with Claude, Cursor, or similar AI coding tools.
• Excellent communication and problem-solving skills.

Responsibilities

• Lead the design and development of scalable C#/.NET applications, APIs, and microservices.
• Drive architecture and engineering solutions for Corporate Payments platforms.
• Build and deploy cloud-native applications using AWS and/or Azure.
• Develop secure, highly scalable APIs, webhooks, and data services.
• Drive automation, testing, CI/CD, and engineering best practices.
• Provide technical leadership and mentoring to engineering teams.
• Leverage Claude and Cursor to improve developer productivity.

Skills

C# / .NET

FinTech Payments

AWS / Azure

REST APIs

Microservices

CI/CD

AI coding tools

Security & Compliance

Leadership

Communication

6+ years experience

Job description

Vinsari LLC is seeking a Lead C#/.NET Engineer with deep experience in Corporate Payments and FinTech. You will architect and implement scalable .NET applications and microservices, deploy cloud-native solutions on AWS/Azure, and drive secure data services.

You will mentor teams, enforce CI/CD, and apply AI-assisted development tools to boost productivity. The role emphasizes hands-on coding, strong architecture leadership, and collaboration with cross-functional teams to deliver compliant,