Senior Virtual Platform Software Engineer, Annapurna Labs Machine Learning Accelerators, AWS

What you'll do

• Build and own functional models of SoC subsystems that integrate into our full-system virtual platform, used by firmware, driver, runtime, and application software teams
• Design models for usability and performance — your customers are software engineers who need to run real workloads on your platform efficiently
• Develop and improve the virtual platform infrastructure: QEMU integration, simulation performance, build and release tooling, and customer-facing documentation
• Work with software teams (your primary customers) to understand their workflows, debug issues on the platform, and shape the model to maximize their productivity
• Drive simulation performance improvements so the platform can handle increasingly complex workloads at scale
• Contribute to model architecture decisions — choosing the right level of abstraction and fidelity for each subsystem based on customer needs

Why this role is interesting

• You'll own a product that software teams across AWS depend on — they literally can't start development without your virtual platform
• The engineering challenges are genuinely interesting: full-system simulation, multi-subsystem integration, QEMU development, performance optimization at scale
• You'll see the direct impact of your work when software teams hit the ground running on new silicon
• As the team grows, there's a path into architectural modeling — using the platform to explore design alternatives and influence chip architecture
• Small team, startup pace, big impact inside AWS's custom silicon org

What you bring

• You have built functional models, virtual platforms, or system-level simulations for SoCs, ASICs, GPUs, or CPUs
• You think of yourself as a software engineer first, with deep domain knowledge in chip architecture
• You are comfortable in C++ or SystemC, and familiar with Python for tooling
• You care about your customers' experience — you think about usability, documentation, and reliability, not just model accuracy
• You are interested in expanding into performance or architectural modeling as the team scales
• You enjoy working on a small, high-impact team where you own significant pieces of the stack

Basic Qualifications

• 5+ years of non-internship professional software development experience
• 5+ years of full software development life cycle, including coding standards, code reviews, source control management, build processes, testing, and operations experience
• Experience as a mentor, tech lead or leading an engineering team
• 7+ years of non-internship professional experience writing functional or performance models
• Experience programming with C++ and/or SystemC
• Knowledge of SoC, CPU, GPU, and/or ASIC architecture and micro-architecture

Preferred Qualifications

• Bachelor's degree in computer science or equivalent
• Experience analyzing data and applying best practices to assess performance drivers
• Experience developing models that integrate with QEMU
• Experience developing and calibrating performance models for custom silicon chips
• Experience with PyTest and GoogleTest
• Familiarity with modern C++ (11, 14, etc.)
• Experience in multi-threaded programming
• Experience with machine learning accelerator hardware and/or software