Senior API Software Engineer (Phoenix)Stelvio Inc. • Phoenix, AZ, US

Senior API Software Engineer (Phoenix)

Stelvio Inc. • Phoenix, AZ, US

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Senior API Software Engineer

Hybrid - 2-3 days on site

Phoenix, AZ

Were looking for a Senior API Software Engineer to help design and build the scalable, cloud-native services that power critical transportation technology used nationwide. In this role, youll architect distributed systems, lead technical initiatives, and mentor developers while collaborating closely with product, architecture, and DevOps teams.

What Youll Do

Design and develop .NET 8based APIs and event-driven services
Build distributed, cloud-native systems using Azure Functions, Service Bus, Event Grid, and other PaaS tools
Implement RESTful APIs and asynchronous communication patterns
Lead CI / CD pipeline design and deployment automation
Apply SOLID principles, DDD, and clean architecture
Conduct code reviews, guide engineering best practices, and mentor junior developers
Work cross-functionally in an Agile, fast-paced environment

What You Bring

6+ years of .NET (C#) development experience

Strong background in SOA, microservices, and distributed systems

Extensive experience with Azure PaaS services

Proficiency with SQL Server and Cosmos DB

CI / CD experience (GitHub Actions or Azure DevOps)

Strong understanding of REST, asynchronous messaging, and clean architecture

Bonus : IaC (Terraform / Bicep), Kubernetes / AKS, CQRS / DDD, NServiceBus / RabbitMQ, Azure certifications, observability tools.

Who You Are

A strategic, proactive engineer who thrives in complex systems, enjoys mentoring others, communicates clearly, and takes ownership from design through delivery.

Benefits

Medical, dental, and vision coverage starting day one

PTO, holidays, and floating holidays

401(k) with employer match

Company-funded lifestyle account

Tuition reimbursement

Voluntary benefits & Employee Assistance Program

Well-being programs, culture initiatives, and community involvement

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