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Foresite Labs (Stealth Co) logo

Senior Staff Machine Learning Software Engineer

Posted about 2 months ago

OfficeSan DiegoSE202k - 215k USD

Senior Staff Machine Learning Software Engineer

Location: San Diego, CA

Job Type: Full-Time

Salary Range: $202K – 215K

Sr. Staff ML/Software Engineer

We are building a product where learned models and compute-heavy inference components have to run inside a tight local runtime budget. Research code is only the starting point. This role owns the path from a working prototype to production inference that is measured, packaged, tested, and ready for repeated use in the field.

You will work closely with the people developing the underlying algorithms, but your ownership is different: production readiness, performance, reliability, and the engineering boundary between exploratory model work and shipped execution. The strongest fit is someone who can explain the bottleneck they found, the number they moved, the tradeoff they accepted, and the test that kept the fix from regressing.

If your best work is making inference faster, smaller, more predictable, and easier to ship, this role is likely a good match.

What You'll Own

  • Turning research prototypes into production inference components with explicit latency, throughput, memory, and accuracy budgets

  • Optimizing the execution path: tensor layout, host/device transfers, batching strategy, kernel launch overhead, mixed precision, quantization, and memory reuse

  • Writing or tuning Rust, C++, and CUDA where framework-level optimization is not enough, then validating the improvement with profiler output and release-facing tests

  • Building inference-adjacent evaluation machinery: calibration checks, confidence behavior, regression detection, dataset slices, and failure-mode reporting tied to product metrics

  • Maintaining the deployment contract: model artifacts, runtime integration, versioning, reproducibility, and performance gates that block unsafe changes

· Algorithm research and novel model design live on a separate track. You will collaborate with that team, translate prototypes into production constraints, and surface shipping risks early when a design needs to change.

Education and Experience

A PhD (6+ years), MS (10+ years) or BS/BA (12+ years) of experience in life sciences or technology.

Must have demonstrated leadership or ownership with 2 of the 5 areas referenced below successfully:

Shipped constrained inference. You have personally moved a model or learned component from prototype to deployed runtime with a real latency, throughput, memory, or power budget. You can name the target, the bottleneck, and the change that closed the gap.

Rust/C++ at shipping depth. You have written production code in Rust or modern C++ where correctness, latency, memory layout, and ownership boundaries mattered. You can reason about the runtime behavior of the code you ship, not just its API surface.

CUDA and accelerator-aware execution. You are comfortable below Python: custom CUDA extensions or kernels, host/device memory movement, launch overhead, profiler traces, and the practical tradeoffs between framework convenience and a purpose-built implementation.

Performance-native judgment. You reason in wall-clock time, memory movement, launch overhead, bandwidth, numerical precision, and error budgets without needing those constraints added late in review.

Production engineering discipline. You define typed interfaces, deterministic behavior, reproducible artifacts, meaningful tests, and clean handoffs with upstream research code.

Strongly Preferred

  • Rust at shipping depth, especially FFI boundaries, pyo3 / maturin, async runtimes, or performance-sensitive service code

  • Inference on constrained local hardware, embedded systems, edge devices, or budget-bound accelerator deployments

  • Quantization, mixed precision, model compression, or kernel fusion that shipped beyond a benchmark notebook

  • Calibration or confidence estimation used on production outputs, with monitoring or regression checks attached

  • Public or shareable evidence of engineering quality: code, technical writing, postmortems, talks, or a concrete shipped system you can discuss

  • Comfort using AI-assisted development tools while still owning correctness, tests, and review quality

Nice to Have

  • Real-time or near-real-time signal-processing systems

  • Products that combine learned models with deterministic numerical code

  • Rust- or C++-based inference or numerical pipelines, including custom FFI to CUDA, cuDNN, TensorRT, or similar accelerator libraries

We are an equal opportunity employer. We thrive on diversity and collaboration.

Job details
Workplace
Office
Location
San Diego
Experience
SE
Salary
202k - 215k USD
per year
Foresite Labs (Stealth Co) logo
Foresite Labs (Stealth Co)
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Foresite Labs creates companies at the intersection of AI/machine learning and science. We believe AI, generative AI, and data science—when applied with scientific rigor—can accelerate discovery and drive innovations that benefit humanity. We provide the foundation for bold ideas to take shape and accelerate, shaping a better future for all. We offer competitive salaries, excellent benefits, and a flexible work environment where employees learn from top thinkers across multiple disciplines. With headquarters in San Francisco and Boston, we’re building a culture where scientific rigor meets entrepreneurial ambition. Foresite Labs Values Truth over progression: We follow the science, pursuing ideas that are grounded in data and abandoning them when not supported by the evidence. Take good risks: Our culture values informed risk-taking: good decisions are celebrated even when they result in bad outcomes. Everyone feels safe to contribute ideas and to learn from failure. Single accountable person: The project team lead is accountable for all decisions and for maintaining transparency and information flow within the team; we trust the project teams. The Review Committee unlocks capital and sets directions. Simplicity and Focus: “Companies die from indigestion, not starvation” (Bill Hewlett) We will focus on a few ideas aggressively and minimize all other distractions. Everyone will have a few key goals that have measurable outcomes. Respect and Community: Our employees are our greatest asset; everyone invests in creating an environment of collaboration and respect. We support their careers and career development whether they stay, go to a Labs company, or end up somewhere else.

Employees
34
Industry
Biotechnology
Headquarters
San Francisco, California
Founded
2019
Company location
601 California St, Suite 600, San Francisco, California 94108, US

Key team members

Alex Aravanis MD PhD

Alex Aravanis MD PhD

Damien Soghoian

Damien Soghoian

Christopher Baldwin

Christopher Baldwin

Kylie Reynolds

Kylie Reynolds

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