Principal Engineer

Fusion Health; Woodbridge (CT); Hybrid; USD 160,000 - 200,000; Full time

Job summary

Fusion Health in the United States is seeking an experienced backend engineer to design and implement scalable systems in C#/.NET. You will own end-to-end delivery of multi-team initiatives and guide architectural decisions to meet reliability, performance, and security requirements.

You will build and maintain Azure-based workloads, optimize costs, and drive observability through tracing and structured logging.

Qualifications

• 7-10+ years of software engineering experience.
• Strong, hands-on proficiency in C# and ASP.NET Core.
• Solid experience with distributed systems and service decomposition.
• Hands-on experience with Microsoft Azure across compute, messaging, identity, data, and API management.
• Solid experience with SQL Server or PostgreSQL and query tuning.
• Familiar with observability tooling such as OpenTelemetry and SLOs.

Responsibilities

• Design and implement scalable backend systems and APIs in C#/.NET with clean architecture and testability.
• Lead end-to-end delivery of complex, multi-team initiatives from design through production.
• Own architectural decisions and contribute to cross-team standards.
• Address performance bottlenecks and technical debt, driving resolution.
• Build and maintain cloud workloads on Azure focusing on reliability and cost efficiency.
• Enhance observability with tracing and structured logging and SLO-driven ops.
• Mentor engineers and raise code quality and technical thinking.
• Collaborate with engineering leads and product to align work with business outcomes.

Skills

Leadership

Team collaboration

Troubleshooting

Mentoring

Technical communication

Tools

C#

ASP.NET Core

Azure

SQL Server

PostgreSQL

OpenTelemetry

Distributed systems

Docker

Kubernetes/AKS

CI/CD

Event-driven architecture

Job description

What You’ll Do

• Design and implement scalable backend systems and APIs in C#/.NET, with clean architecture and high testability.
• Lead end-to-end delivery of complex, multi-team technical initiatives from design through production.
• Own architectural decisions in your domain and contribute to cross-team standards and patterns.
• Dig into critical issues, performance bottlenecks, and technical debt, and drive them to resolution.
• Build and maintain cloud workloads on Azure with a focus on reliability, cost efficiency, and operability.
• Contribute to observability: distributed tracing, structured logging, and SLO-driven operations.
• Mentor engineers across the team, raising the quality of code, design, and technical thinking.
• Partner with engineering leads and product to align technical work with business outcomes.

Who You Are

• 7-10+ years of software engineering experience, with a track record of leading complex technical work across teams.
• Strong, hands-on proficiency in C# and ASP.NET Core, building production backend services and APIs.
• Solid experience with distributed systems: service decomposition, event-driven patterns, and designing for failure.
• Hands-on experience with Microsoft Azure across compute, messaging, identity, data, and API management.
• Solid experience with SQL Server or Postgres, including data modeling and query performance tuning.
• Familiar with observability tooling: OpenTelemetry, distributed tracing, structured logging, SLOs and SLIs.
• Experience with Docker, Kubernetes/AKS, and CI/CD pipeline design.
• Able to evaluate and communicate trade-offs clearly to both technical and non-technical stakeholders.
• Experience in regulated or high-reliability industries (healthcare, finance, public sector) is a plus.

Additional Details:

• This is an on-site (hybrid), full-time, salaried position. Our normal hours of operation are Monday - Friday, 8:00 AM - 4:00 PM.
• This position description is not intended to be exhaustive, and other duties may be assigned as they arise.
• It is not expected that applicants have any familiarity with Fusion’s proprietary applications, Healthcare software, or Corrections/Public Health business processes. Qualified candidates will be able to demonstrate related experience and transferable skills that will work well with the Fusion team.
• At this time, this position is not eligible for employment sponsorship.
• Fusion is an equal employment opportunity employer.

Compensation

• Salary Range: $160,000- $200,000.
• At Fusion, our salary ranges are designed to be competitive within our size and industry. Compensation is just one component of a comprehensive total rewards package that also includes benefits, flexibility, and growth opportunities.
• Individual pay decisions areinformed by several factors, including location, experience, qualifications, skillset, and internal equity across the organization. While we expect most offers to fall within the stated range, each compensation decision is made thoughtfully, with consideration for both the candidate’s unique profile and our commitment to pay parity.