Senior Software Engineer

Senior Software Engineer About Advantest Test Solutions (ATS) Advantest Test Solutions (ATS) is a global leader in semiconductor test infrastructure, delivering high-performance, massively parallel test platforms to customers worldwide. Position Overview We are seeking a Senior Software Engineer with strong hands-on expertise in designing, building, and owning high-performance, cross-platform software platforms for semiconductor test systems. This role is focused on deep engineering, software product development, platform ownership, and customer-facing technical execution across SLT, Burn-In, and HPC environments. Key Responsibilities Design, develop, and maintain high-performance software platforms and products for on-premises and hybrid deployments Lead modernization of legacy software components into scalable, production-ready architecture Build cross-platform server and terminal applications (Windows, Linux, macOS), including development using the OneImlx.Terminal framework Expert in test program development using ActivATE® test platform system for SLT, BI and HPC ecosystem. Lead SW design and implementation with Electrical, Mechanical, Thermal engineering and create ActivATE360® SDK environment for developing device and instrumentation drivers Develop software, drivers, and test programs for advanced silicon targeting SLT (System Level Test), Burn-In, and HPC (High-Performance Computing) platforms Engineer software for control, communication, and data flow across mechatronic and semiconductor test subsystems Design, implement, and own SCAN execution and vector conversion pipelines across multiple digital pin-card configurations, ensuring correctness, scalability, and performance Engineer distributed systems supporting high-throughput telemetry, messaging, and data pipelines Work extensively with networking and communication protocols (TCP/IP, UDP, HTTP, gRPC) Actively code, design, document, review, and support production-quality software Serve as a technical interface with customers and internal cross-functional teams Support on-site deployments and occasional domestic and international travel (10–20%) All other duties as assigned. Required Skills & Experience S. in Computer Science, Computer Engineering, Software Engineering, or related field (M.S. preferred) 7+ years of software development experience, including 5+ years with C# and .NET Strong expertise in the .NET ecosystem and cross-platform development Proficiency in C#, C++, Python, SQL, and NoSQL technologies Experience with Apache Pulsar, Microsoft Azure, and distributed messaging systems Strong background in multithreading, asynchronous programming, and high-performance systems Hands-on experience building and deploying on-premises and hybrid software platforms Demonstrated ability in large-scale data flows, telemetry throughput optimization, and system-level design Strong technical design, documentation, and communication skills Must be willing to work onsite in Lake Forest, CA. Preferred / Plus Qualifications Prior experience with semiconductor test systems and testers Experience developing or working with semiconductor test IDEs Familiarity with ActivATE™ and/or Advantest 93000 SOC platform (SmarTest) Experience with digital test, SCAN, pattern execution, and vector-based test flows Experience with modern test frameworks and practices (xUnit, FluentAssertions, TDD, Playwright, Blazor) Additional Requirements Ability and willingness to travel domestically and internationally, sometimes on short notice Strong written and verbal communication skills