Senior C# .NET Engineer — Cloud APIs & Leadership

Triwill Group; United States; On-site; USD 140,000 - 190,000; Full time

Job summary

Triwill Group is seeking a Sr. Software Engineer in the United States to build scalable APIs using C# and .NET Core, with a focus on reliability and performance.

You will balance hands-on development with technical leadership, architecture discussions, testing, and continuous improvement while collaborating with cross-functional teams.

This role offers exposure to AWS, Kubernetes, OpenTelemetry, PostgreSQL and modern cloud practices across critical business capabilities.

Qualifications

• Proven experience with C#/.NET Core in production.
• Ability to design scalable APIs and high-performance systems.
• Experience leading technical discussions and mentoring peers.
• Familiarity with cloud platforms and observability practices.

Responsibilities

• Design and evolve scalable APIs powering critical services.
• Lead architecture discussions and guide technical direction.
• Collaborate with cross-functional teams to deliver reliable software.
• Mentor engineers and promote engineering best practices.

Skills

C# / .NET

API design

Distributed systems

Mentoring

Tools

AWS

Kubernetes

OpenTelemetry

PostgreSQL

Job description

Triwill Group is seeking a Sr. Software Engineer in the United States to build scalable APIs using C# and .NET Core, with a focus on reliability and performance.

You will balance hands-on development with technical leadership, architecture discussions, testing, and continuous improvement while collaborating with cross-functional teams.

This role offers exposure to AWS, Kubernetes, OpenTelemetry, PostgreSQL and modern cloud practices across critical business capabilities.