Principal Software Engineer

Medical Guardian

. Own application architecture for new development and partner with existing system owners .

Posted 10/2/2026full-timePhiladelphia • Pennsylvania • United StatesLeadWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates extensive experience in application architecture, backend engineering with C# and .NET, and hands-on development in production systems. Proficient in cloud technologies, particularly Microsoft Azure, and skilled in mentoring engineers while managing technical direction and quality standards.

Highest-signal resume keywords

C# DevelopmentASP.NET ServicesMicrosoft AzureDocker ContainersRelational Databases

ATS Keywords

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Hard Skills

Application ArchitectureAPI DesignTechnical Decision MakingCode ReviewEvent-Driven ArchitectureAsynchronous ArchitectureProduction Code in PHPSchema DesignData Access PatternsAgentic AI Workflows

Soft Skills

MentoringCollaborationCommunication

Tools & Technologies

Azure Kubernetes ServiceCI/CD PipelinesMicrosoft SQL ServerLinux Systems

Industry Keywords

IoT SystemsTelemetry-Driven BackendsEnterprise SaaS SystemsSalesforce Integration

Tech Stack

Tools & technologies

AzureCloudDockerIoTKubernetesLinuxMS SQL ServerPHPSQL.NET

About the role

Key responsibilities & impact

Own application architecture for new development and partner with existing system owners
Make and document decisions on application structure, technology and framework choices, integration approaches, and service boundaries
Serve as escalation point for complex technical decisions
Design, build, and maintain shared frameworks, libraries, and abstractions
Own authentication, authorization, error handling, resiliency, logging, metrics, observability, integration standards, and service contracts
Write and review production code in PHP for existing systems and C#/.NET for new services and modernization
Define and uphold technical quality standards and assess technical debt and delivery tradeoffs
Partner with release and operations leadership to ensure production-safe changes
Mentor engineers through code reviews, pairing, and implementation-focused design discussions
Provide technical input on scoping and estimates and surface architectural risks
Collaborate with DevOps and infrastructure teams on deployment patterns, CI/CD evolution, and environment consistency
Communicate technical decisions to engineering leadership and stakeholders
Supervise and line-manage a small number of engineers while remaining primarily hands-on

Requirements

What you’ll need

10+ years of professional software engineering experience, with a strong record of hands-on development in production systems
Experience owning architectural decisions and technical direction for complex applications
Strong backend engineering experience using C# and .NET for building services and APIs
Experience designing and maintaining clean, well-defined APIs and service interfaces, including integrations with third-party systems
Hands-on experience with Microsoft Azure, including AKS (Azure Kubernetes Service) and core Azure integration and messaging services
Experience delivering applications using Docker containers and CI/CD pipelines
Strong experience with relational databases (Microsoft SQL Server), including schema design and data access patterns
Experience with event-driven or asynchronous architectures, including messaging-based systems
Comfort working in existing PHP codebases while leading migration to cloud-native C#/.NET services on Azure
Hands-on experience building agentic AI workflows in production, including agent frameworks, tool/function calling, RAG, and MCP (Model Context Protocol)
Ability to work from the Philadelphia, PA office on Tuesdays and Wednesdays
Legally authorized to work in the United States without current or future employer sponsorship
Preferred: Familiarity with IoT systems or telemetry-driven backends
Preferred: Experience integrating with Salesforce, e-commerce platforms, or other enterprise SaaS systems
Preferred: Working knowledge of Linux-based systems and system administration concepts
Preferred: Experience with monitoring, logging, and metrics in production environments
Preferred: Familiarity with PHP-based enterprise systems
Preferred: Experience helping teams adopt agentic AI, including agent standards, guardrails, shared context layers, RAG pipelines, MCP servers, and evaluation

Benefits

Comp & perks

Health Care Plan (Medical, Dental & Vision)
Paid Time Off (Vacation, Sick Time Off & Holidays)
Company Paid Short Term Disability and Life Insurance
Retirement Plan (401k) with Company Match