Senior Machine Learning Engineer

Voice AI Space; United Kingdom; Hybrid; GBP 60,000 - 80,000; Full time

Job summary

A leading AI technology firm in the UK is seeking a Senior Machine Learning Engineer to contribute to innovative speech technology. The ideal candidate will work on R&D projects, focusing on the latest ML developments, and play a key role in deploying cutting-edge solutions. The role requires strong collaborative skills and a deep understanding of modern ML applications and strategies. Flexible working policies and a supportive work culture are part of what we offer.

Benefits

Flexible working

Private Medical and Dental

Global working opportunities

Generous holiday allowance

Working from home allowance

Qualifications

• Demonstrated experience in pursuing ambitious R&D agendas.
• Precise attention to detail and understanding of ML direction.
• Understanding of modern ML stack and optimization strategies.

Responsibilities

• Work on complex R&D projects with a diverse team.
• Stay updated with the latest Machine Learning developments.
• Mentor team members where appropriate.

Skills

Machine Learning

Collaborative Work

Attention to Detail

Understanding of ML Stack

Distributed Training Techniques

Education

Publications in Top-tier Conferences

Tools

Transformer Architectures

Job description

Overview

We are hiring a Senior Machine Learning Engineer to contribute to cutting-edge Research & Development. As innovators in speech technology, our mission is to Understand Every Voice—a vision that has propelled us to be world leaders of Voice AI, including STT, TTS, and Flow, and our Conversational AI platform. We’re looking for an experienced Machine Learning Engineer to accelerate our efforts toward exceptional speech solutions.

About the Modelling Team

Our Modelling Team trains diverse models, including large self-supervised ones, supporting Speechmatics toward being the most accurate speech recognition system globally. It also ensures their deployment into production, working with the latest developments in ML, and with strong engineering practices for software engineering and model serving.

What you’ll be doing

• Work on complex R&D projects with a diverse group of engineers to achieve ambitious goals.
• Stay current with the latest developments in machine learning.
• Execute high-impact projects to ensure team success.
• Collaborate across departments and mentor team members where appropriate.

Who we are looking for

• Demonstrated experience in collaboratively pursuing ambitious R&D agendas.
• Precise attention to detail, with an understanding of how the big picture relates to company goals and the future of machine learning.
• Understanding of the modern ML stack, for example:
  • Contemporary transformer architectures (e.g., GQA, KV-caching) and best practices.
  • Experience in distributed training techniques.
  • Familiarity with optimization strategies for model inference (e.g., dynamic batching, flash attention, speculative decoding).
• Preferred backgrounds covering some of the following:
  • Publications in top-tier conferences.
  • Contributions to popular open-source repositories.
  • Technical writing skills evidenced by publications or blogs.

We encourage you to apply even if you do not feel you match all of the requirements exactly. The list of requirements is intended to show the kinds of experience and qualities we’re looking for, but it is not exhaustive. If you are interested in the role, the team, and our mission, we would love to consider your application. We are always open to conversations and look forward to hearing from you.

Who we are

Speechmatics is the leading expert in Speech Intelligence, using AI and machine learning to unlock business value in human speech worldwide. We work with a mix of global companies, and our technology can integrate into customers stacks irrespective of their industry or use case, making it the go-to solution to harness useful information from speech.

Working at Speechmatics

Joining us means working with some of the smartest minds around the world, focused on cutting-edge projects and deploying the latest techniques to disrupt the market. We prioritise people development and offer tools to help you thrive. Our Focus Fridays give you an undisturbed day of focus, offset with Together Tuesdays for team meetings, so you have the right balance.

We have a hybrid approach with 2-3 designated office days each week to balance remote work with in-person collaboration.

This is only the beginning; we’re looking for amazing people like you to continue our journey…

What we can offer you

No matter your career stage, we’ll support your training and development to reach your goals. There are opportunities to get involved and collaborate to deliver your best work.

We offer flexible working, regular company lunches, birthday celebrations, private medical and dental for you and your family, global working opportunities, generous holiday allowance, and pension/401K matching. Each employee receives a working-from-home allowance for equipment. Our parental leave approach supports employees globally, including adoption assistance and reproductive health services.

Our mission

At Speechmatics, our mission is simple: Understand Every Voice. We welcome diverse experiences and identities and strive to create an inclusive environment where every voice is heard and valued.

#LI-Hybrid