Software Engineer (C# / Desktop Systems)

Software Engineer (C# / Desktop Systems) - 2 OpeningsHybrid | Vista, CA (2 days onsite / 3 days remote)Contract with strong long-term potentialAre you a C# engineer who enjoys working close to the hardware-building real products that interact with sensors, devices, and complex systems? This role is not web development. You'll be working on sophisticated Windows desktop software that powers advanced inspection and imaging systems used globally in high-impact environments.This team is expanding due to growing product demand and a large, complex codebase that values engineers who like depth, longevity, and technical challenge.What You'll Work OnMaintain and enhance large-scale Windows desktop applications written primarily in C#Develop software that interfaces with embedded systems, sensors, PLCs, and hardware devicesSupport both new product development and sustainment of existing systems with millions of lines of codeAnalyze failures, debug complex issues, and implement durable fixes in a mature codebaseCollaborate daily with Electrical Engineers, Mechanical Engineers, and ScientistsBuild and improve services, simulators, diagnostics, and toolingContribute to algorithm-driven features involving imaging, signal processing, and data analysisParticipate in Agile workflows: daily standups, backlog-driven work, code reviews, CI, and TDDTechnical EnvironmentC# / .NET (desktop, client-server, multithreaded)Windows Services, messaging, real-time data processingInterfacing with hardware, sensors, and embedded systemsSome legacy C++ in the ecosystemMessaging systems (e.g., brokered or queue-based architectures)CI/CD pipelines and automated testingObject-oriented design with a focus on maintainability and extensibilityRequired Experience8+ years overall software development experience4+ years of C# in production environments supporting products or devices (not web apps)Strong understanding of object-oriented design and navigating complex codebasesExperience with desktop or client-server applications on WindowsSolid troubleshooting and debugging skillsFamiliarity with Agile, TDD, and continuous integrationAbility to produce clear technical documentationBachelor's degree in Computer Science or equivalent experienceBest-fit backgrounds: medical devices, imaging systems, industrial controls, hardware-integrated software, sensors, PLCs, or similar product-based environments.Nice to HaveMultithreading and real-time systems experienceImage processing or computer vision exposure (e.g., OpenCV)Messaging systems (e.g., RabbitMQ or similar)Embedded systems, RTOS, or PLC integrationSecurity-focused software developmentExperience refactoring large, legacy systemsFamiliarity with WPF / PrismAlgorithm development or strong math/engineering foundationInterest in AI/ML-enabled tooling or workflowsWhy Engineers Like This TeamWork on physical products that have real-world impactDeep, challenging engineering problems (not CRUD or UI-heavy work)Strong team culture with long-tenured engineersHigh likelihood of long-term extensions due to the specialized domain knowledgeOpportunity to grow into future initiatives involving machine learning and advanced analyticsHybrid schedule with flexibility once onboardedInterview ProcessInteractive technical interview with software engineersLive problem-solving (e.g., fixing unit tests, working through multidimensional arrays, imaging-style logic)Focus on communication, reasoning, and coding-not triviaJob Type & LocationThis is a Contract position based out of Vista, CA.Pay And BenefitsThe pay range for this position is $75.00 - $75.00/hr.Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following:Medical, dental & visionCritical Illness, Accident, and Hospital401(k) Retirement Plan - Pre-tax and Roth post-tax contributions availableLife Insurance (Voluntary Life & AD&D for the employee and dependents)Short and long-term disabilityHealth Spending Account (HSA)Transportation benefitsEmployee Assistance ProgramTime Off/Leave (PTO, Vacation or Sick Leave)Workplace TypeThis is a fully onsite position in Vista,CA.Application DeadlineThis position is anticipated to close on May 8, 2026.>About TEKsystems:We're partners in transformation. We help clients activate ideas and solutions to take advantage of a new world of opportunity. We are a team of 80,000 strong, working with over 6,000 clients, including 80% of the Fortune 500, across North America, Europe and Asia. As an industry leader in Full-Stack Technology Services, Talent Services, and real-world application, we work with progressive leaders to drive change. That's the power of true partnership. TEKsystems is an Allegis Group company.The company is an equal opportunity employer and will consider all applications without regards to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.About TEKsystems And TEKsystems Global ServicesWe're a leading provider of business and technology services. We accelerate business transformation for our customers. Our expertise in strategy, design, execution and operations unlocks business value through a range of solutions. We're a team of 80,000 strong, working with over 6,000 customers, including 80% of the Fortune 500 across North America, Europe and Asia, who partner with us for our scale, full-stack capabilities and speed. We're strategic thinkers, hands-on collaborators, helping customers capitalize on change and master the momentum of technology. We're building tomorrow by delivering business outcomes and making positive impacts in our global communities. TEKsystems and TEKsystems Global Services are Allegis Group companies. Learn more at TEKsystems.com.The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.