Staff Software Engineer

Ritchie Bros.

. Lead application modernization initiatives, including migration from legacy .NET Framework to modern .NET (.NET Core / latest LTS) .

Posted 9/22/2026full-timeWestchester • Illinois • United StatesLead💰 $123,950 - $154,880 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates deep expertise in C#, .NET, and modern application development practices, with a strong focus on application modernization and architectural design for scalable services. Proven ability to lead technical initiatives, mentor engineers, and ensure high-quality engineering standards.

Highest-signal resume keywords

C#.NET CoreRESTful API DesignCloud PlatformsApplication Modernization

ATS Keywords

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Hard Skills

Application ModernizationArchitectural DesignData-Access PatternsORMsService-Oriented ArchitectureDomain-Driven ArchitectureRelational DatabasesSecure Coding PracticesHigh-Throughput SystemsEvent-Driven Architecture

Soft Skills

Excellent CommunicationMentoringInfluencing

Tools & Technologies

OpenTelemetryAzure

Industry Keywords

Compliance-Sensitive EnvironmentsOperational WorkflowsCode Quality Standards

Tech Stack

Tools & technologies

AzureCloudReact.NET

About the role

Key responsibilities & impact

Lead application modernization initiatives, including migration from legacy .NET Framework to modern .NET (.NET Core / latest LTS)
Drive architectural design for scalable, modular services and APIs supporting high-volume operational workflows
Partner with Product and Architecture to decompose monolithic applications into well-defined domains and services
Define and implement modern data-access patterns using ORMs, repository patterns, and controlled schema migrations
Improve system performance, resilience, and fault tolerance through timeouts, retries, idempotency, and graceful degradation
Establish and enforce engineering standards for code quality, testing, and maintainability
Embed observability using structured logging, metrics, and distributed tracing with OpenTelemetry
Design secure-by-default application patterns including authentication, authorization, secrets management, and secure coding practices
Lead technical discovery and solution design for complex, cross-team initiatives
Mentor senior and mid-level engineers through design reviews, code reviews, and hands-on technical guidance
Collaborate with Infrastructure, Security, Data, and Operations teams to meet operational and compliance requirements

Requirements

What you’ll need

8+ years of professional software engineering experience, with significant time spent modernizing large-scale applications
Demonstrated experience operating at a Staff or Principal Engineer level, influencing architecture and technical direction
Deep expertise in C#, .NET, .NET Core, and modern application development practices
Strong experience designing RESTful APIs and service-oriented or domain-driven architectures
Hands-on experience modernizing legacy systems and databases in production environments
Strong understanding of relational databases and modern data-access strategies
Experience with cloud platforms; Azure preferred
Excellent communication skills with the ability to clearly explain technical tradeoffs to engineering and business stakeholders
Proven ability to lead through influence, mentor engineers, and raise overall engineering quality
Bonus: Experience with high-throughput, transaction-heavy operational systems
Bonus: Exposure to event-driven or asynchronous architectures
Bonus: Experience modernizing applications in regulated or compliance-sensitive environments
Bonus: Familiarity with front-end modernization, such as React

Benefits

Comp & perks

Medical insurance
Dental insurance
Vision insurance
Basic life insurance
401(k) plan with 100% company matching for the first 4% contributed
15 days of PTO each year
Hybrid work arrangement