Senior Full-Stack Engineer - React/.NET Core, Client-Facing

Sironik Tech Pvt. Ltd.; New York (NY); On-site; USD 120,000 - 180,000; Full time

Job summary

Sironik Tech Pvt. Ltd. is seeking a senior engineer to join the core product team, building scalable web applications for enterprise clients in New York.

You will work across the full stack with React and .NET Core, and collaborate directly with clients to understand needs and deliver robust solutions. You will own architectural decisions, uphold high engineering standards, and communicate clearly as you drive features end-to-end.

Qualifications

• 5+ years of full-stack development experience.
• Proficiency in React and TypeScript.
• Strong C#/.NET skills (5.0+).
• Experience with cloud platforms (AWS or Azure).
• Relational databases (PostgreSQL or SQL Server).
• Familiarity with Docker and CI/CD pipelines.
• Strong communication skills — we work closely with clients.

Responsibilities

• Build scalable web applications for enterprise clients.
• Work across the full stack with React and .NET Core.
• Collaborate directly with clients and architects.
• Influence architecture decisions and engineering standards.
• Take ownership and communicate clearly.

Skills

Full-stack development

React

TypeScript

Communication

Tools

C# / .NET

AWS

Azure

Docker

CI/CD

PostgreSQL

SQL Server

Job description

Sironik Tech Pvt. Ltd. is seeking a senior engineer to join the core product team, building scalable web applications for enterprise clients in New York.

You will work across the full stack with React and .NET Core, and collaborate directly with clients to understand needs and deliver robust solutions. You will own architectural decisions, uphold high engineering standards, and communicate clearly as you drive features end-to-end.