Principal Machine Learning Engineer at global leader in Voice AI

This is a job that Jill, our AI Recruiter, is recruiting for on behalf of one of our customers.

She will pick the best candidates from Jack's network.

The next step is to speak to Jack.

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Job Title

Principal Machine Learning Engineer

Salary

Not Disclosed

Company Description

Global leader in Voice AI and speech recognition technology headquartered in London

Job Description

You will lead the translation of cutting-edge research into scalable, customer-centric speech solutions. This high-ownership role involves developing diverse ML models, including large self-supervised architectures, to maintain the world’s most accurate speech recognition system. You will span the entire codebase, driving technical vision and mentoring engineering teams to achieve excellence in model deployment.

Location

London, UK

Why this role is remarkable

• Work at the forefront of Voice AI innovation, building models that help the world "Understand Every Voice" through world-leading speech technology.
• Take on a high-impact technical leadership role with total ownership, co-defining the long-term technical vision for an organization at the peak of its market.
• Join a specialized modeling team that balances high-level research with robust engineering practices, utilizing the latest in transformer architectures and MLOps.

What You Will Do

• Develop and optimize advanced ML models for speed, accuracy, and cost efficiency, ensuring seamless transition from research to production.
• Define and enforce technical best practices across the organization for code quality, model lifecycle management, and containerized deployment.
• Mentor fellow engineers and foster a culture of technical excellence while identifying and solving complex ML bottlenecks across the entire product stack.

The ideal candidate

• Possesses deep expertise in the modern ML stack, including contemporary transformer architectures (GQA, KV-caching) and distributed training techniques.
• Demonstrates a proven track record of deploying large-scale models using Python, PyTorch/TensorFlow, and MLOps tools like Docker and Kubernetes.
• Brings a specialized background in speech-to-text or text-to-speech technology, ideally with contributions to open-source projects or top-tier research publications.

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Who are Jack & Jill?

Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.

And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.

How does this work?

• Jack's an AI agent for job searching and career coaching. He works for you.
• Jill is the AI recruiter working for the company. She recruits from Jack's network.
• If it's a match and the company wants to meet you, they'll make the intro. In the meantime, if you'd like, Jack will send you excellent alternatives.

We never post fake jobs

This isn't a trick. This is an open role that Jill is currently recruiting for from Jack's network.

Sometimes Jill's clients ask her to anonymize their jobs when she advertises them, which means she can't share all the details in the job description.

We appreciate this can make them look a bit suspect, but there isn't much we can do about it.

Give Jack a spin! You could land this role. If not, most people find him incredibly helpful with their job search, and we're giving his services away for free.