One Call · 11 hours ago
Senior / Principal Engineer
United States
Full-time
Remote
Senior Level, Lead/Staff
10+ years expOne Call is a company focused on providing care coordination to injured workers. The Senior/Principal Software Engineer will provide architectural depth and hands-on leadership in a legacy-heavy environment, driving technical decision-making and ensuring high-quality software delivery across mission-critical applications.
Health CareMedicalWellness
Responsibilities
Own and drive architecture and design discussions across multiple applications and services
Provide pragmatic, hands-on guidance to teams working across .NET, SQL, and mixed front-end stacks
Evaluate legacy architectures and propose modernization patterns (service boundaries, APIs, refactors, consolidation)
Facilitate technical decision-making with crisp rationales, tradeoff analysis, and clear documentation
Champion engineering excellence: code quality, testing, CI/CD maturity, observability, and maintainability
Unblock teams quickly by diagnosing issues across the entire stack (app, API, data, infrastructure)
Collaborate with Product, QA, Design, and other engineering teams to ensure predictable delivery
Translate complex requirements into executable technical plans, work breakdowns, and sequencing
Identify risks early and recommend options that balance delivery velocity with long-term stability
Contribute high-quality code in .NET (.NET Framework, .NET Core), C#, and VB.NET where necessary
Build and enhance web apps using ASP.NET MVC, Web API, Web Forms, and WinForms
Develop and optimize SQL Server objects (stored procedures, SSIS packages, ETL pipelines, reporting)
Implement robust APIs, REST services, Windows Services, and data-access layers
Work across JavaScript/TypeScript, jQuery, Knockout, Bootstrap, and related UI frameworks
Elevate engineering practices through code reviews, pairing, and informal mentorship
Introduce and promote standards around branching strategy, trunk-based development, and CI/CD pipelines
Improve team problem-solving approaches—debugging, root-cause analysis, instrumentation
Leverage AI-assisted engineering tools (GitHub Copilot, ChatGPT, Azure OpenAI, etc.) to accelerate development, improve code quality, and enhance documentation—not as shortcuts, but as force multipliers
Model responsible, high-impact use of AI by using it for pattern detection, refactoring scaffolds, test generation, API documentation, and reducing cognitive load on repetitive work
Help establish norms for AI usage across the team: when to use it, when not to, how to verify output, and how to integrate it safely into delivery pipelines
Build and maintain Azure DevOps pipelines (YAML, MSBuild, MSDeploy)
Integrate automated testing frameworks (MSTest, NUnit, XUnit, Moq)
Work with legacy build systems (Jenkins, Hudson/VSTS)
Support application packaging using MSI, WiX, InstallShield, and ClickOnce
Script and automate workflows using PowerShell and Bash
Qualification
Required
10+ years building enterprise .NET applications in C# (.NET Framework + .NET Core)
Experience modernizing large legacy .NET codebases (service extraction, modularization, domain consolidation)
Familiarity with Azure cloud services, logging, monitoring, and observability patterns
Experience in healthcare, workers' compensation, claims processing, or regulated industries
Experience with distributed queues, messaging patterns, event-driven architecture
Experience maintaining VB.NET codebases
Deep experience with ASP.NET MVC, Web API, WCF, Web Forms, WinForms
Strong proficiency in SQL Server (T-SQL, performance tuning, SSIS, SSRS)
Strong front-end fundamentals in JavaScript, TypeScript, HTML, CSS/SASS
Familiarity with jQuery, Knockout, and Kendo UI; required Bootstrap experience
Experience with ORMs (Entity Framework, LINQ, Dapper)
Automated testing expertise with MSTest, NUnit, XUnit, Moq
Azure DevOps pipelines, repos, gated builds, YAML
PowerShell and Bash scripting
Ability to diagnose and resolve complex production issues quickly
Ability to work in an environment that aligns with the company's diversity, equity, inclusion and belonging standards
Ability to work both independently and in a team environment
Demonstrate our core values of Think Big, Go Fast, Deliver Awe, Win Together and Care Deeply
Benefits
Remote Work: We are a remote-first company, and almost all positions receive the flexibility of working from home.
Generous Time Off: Besides 8 company holidays and 2 personal days every year, all colleagues receive a minimum of 18 days of paid time off.
Comprehensive Benefits Package: Including medical, dental, vision, and pet insurance; 401(k) matching program; and company-paid life insurance and short and long-term disability coverage.
Supportive Services: Just like our colleagues get injured workers the care they need when they need it, we want to do the same for our colleagues in their time of need. We offer a Colleague Assistance Program that provides free counseling and financial services, and our One Call Foundation, a non-profit arm of our company, provides colleagues financial assistance during times of unexpected hardships.
Company
One Call
For more than 30 years, One Call has served the workers’ compensation industry by coordinating care for injured workers in partnership with our high-quality provider network As a leader within a complex industry, we’re committed to streamlining the claims process.
1001-5000 employees
H1B Sponsorship
One Call has a track record of offering H1B sponsorships. Please note that this does not
guarantee sponsorship for this specific role. Below presents additional info for your
reference. (Data Powered by US Department of Labor)
Distribution of Different Job Fields Receiving Sponsorship
Represents job field similar to this job
Trends of Total Sponsorships
2020 (1)
Funding
Current Stage
Late StageTotal Funding
$20MKey Investors
ApolloNorwest Mezzanine Partners
2025-09-10Debt Financing
2013-10-25Acquired
2010-05-24Series Unknown· $20M
Leadership Team
Juan Perez
Chief Financial Officer
Derrick Yancy
MEDICAL SERVICES COORDINATOR:
Recent News
2025-09-12
Company data provided by crunchbase