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Principal Machine Learning Engineer (Reconstruction / Quantitative Imaging)

Midjourney
San FranciscoPosted 9 days ago

Role Overview

Midjourney is hiring a Principal Machine Learning Engineer (Reconstruction / Quantitative Imaging). This is a full-time hybrid role, based in San Francisco. Part of Midjourney's Data Science hiring, posted last week. Full responsibilities, required qualifications, and the apply link are listed in the description below.

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DriftORWHATYOULLDOPartnerML

Job description

WHAT YOU’LL DO

1. Partner with medical image reconstruction scientists / engineers to build ML components that improve reconstruction quality, speed, robustness, or quantitative accuracy.

2. Define training/evaluation pipelines, datasets, and metrics that map to user needs and design requirements.

3. Productionize models: inference performance, reproducibility, monitoring for drift/regressions, and safe fallbacks.

4. Collaborate on hybrid algorithms, incorporating physics and learned priors, denoisers, learned regularizers, and quality estimation.

5. Help build tooling for rapid experimentation as well as rigorous verification of algorithm changes.

WHAT WE’RE LOOKING FOR

  • Strong applied ML experience plus comfort with signal processing / imaging or adjacent domains.
  • Ability to move fluidly between research prototypes and production-quality systems.
  • Strong evaluation discipline: metrics, ablations, data leakage avoidance, and reproducibility.
  • A demonstrated track record of applying ML to physics-based or inverse problems (i.e., shipped projects, a portfolio, or publications.)

USEFUL EXPERIENCE

  • ML for imaging/inverse problems (or adjacent) with strong evaluation discipline and comfort with GPU performance constraints.
  • Pragmatic production mindset: reproducible training/inference, regression testing, and safe deployment in high-stakes contexts.
  • A background in computational physics or scientific computing.
  • Leverage ML-based methods such as PiNNs and Neural Operators to solve partial differential equations arising in ultrasound simulation and imaging.
  • Experience in Agentic-SciML is a plus.
  • Hands-on experience with data curation for ML: building datasets from messy, real-world sources, defining ground truth, and managing labeling or simulation pipelines.
  • Background in data assimilation: combining observations with physics-based models (Kalman filtering, variational methods, ensemble approaches, or learned variants).

About Midjourney

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Midjourney

Data ScienceHybrid

9 other open roles at Midjourney on TryApplyNow.

Frequently Asked Questions

How do I apply for the Principal Machine Learning Engineer (Reconstruction / Quantitative Imaging) position at Midjourney?

Use the Apply button above to submit your application directly to Midjourney. Most applications take less than 5 minutes if your resume and contact details are ready, and you'll be routed to the employer's official application system to finish.

Is the Principal Machine Learning Engineer (Reconstruction / Quantitative Imaging) role at Midjourney remote or in-office?

This is a hybrid role based in San Francisco. Expect a mix of in-office and remote days, with the specific cadence set by the hiring manager.

What does a Principal Machine Learning Engineer (Reconstruction / Quantitative Imaging) at Midjourney earn?

Midjourney has not disclosed a salary range in this posting. Many employers share specifics later in the interview process; you can also ask during a recruiter screen if compensation transparency is important to you.

When was the Principal Machine Learning Engineer (Reconstruction / Quantitative Imaging) role at Midjourney posted?

This role was posted on June 30, 2026 (9 days ago). It's still listed as actively hiring; we re-confirm openings against the source system multiple times per day and remove closed roles.

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