S

Speechmatics

Cloud-based ASR platform with multilingual transcription

ML Data & Platform Engineer

Full-Time
No salary listed
Mid
London, UK
HybridTwo to three designated office days per week are required.
AI & Machine LearningApplied Machine Learning

About the job

Requirements
  • Strong proficiency in Python and SQL, with a solid backend or data engineering foundation.
  • Hands-on experience with containerisation and orchestration using Docker and Kubernetes, and experience working with a major cloud provider.
  • Experience building data pipelines and ETL/ELT processes at scale, including web scraping or automated data collection.
  • A solid understanding of the machine learning lifecycle, from data through model training, evaluation, and serving.
  • Experience with data quality practices such as validation, cleaning, and normalisation, and/or production-grade observability.
  • Ability to design resilient, scalable architectures and comfort operating and troubleshooting distributed systems.
  • MLOps experience, such as model serving, experiment tracking, GPU or distributed training optimisation, or reproducible machine learning workflows.
Responsibilities
  • Design, build, and maintain scalable data pipelines for ingesting, transforming, validating, and storing large datasets used to train models.
  • Develop and maintain web scraping and data acquisition solutions to keep training datasets fresh, high-quality, and available at scale.
  • Build and operate infrastructure that enables the machine learning team to deploy and evaluate new models quickly and serve models efficiently and reliably in production.
  • Optimise infrastructure for iteration speed and production reliability, including GPU utilisation, job scheduling, and training efficiency.
  • Implement observability, including monitoring, logging, and alerting, across data pipelines and machine learning systems.
  • Troubleshoot complex issues across distributed systems spanning data infrastructure, training, and inference.
  • Continuously improve data and MLOps practices and help shape the roadmap for the platform as it scales.

About the company

Speechmatics provides automatic speech recognition (ASR) technology that converts spoken language into text. It offers a platform-as-a-service (PaaS) with an API, enabling developers and businesses to embed real-time or batch transcription into their apps and workflows. Deployment options include cloud, on-premises, and on-device to support different security needs. The models are trained on millions of hours of unlabeled audio to support many languages, dialects, and accents, including a Global English model that handles major English accents with a single backbone. Distinguishing features include speaker identification, automatic punctuation, translation, and products like Ursa and Flow. The company targets media, contact centers, enterprise communications, and healthcare, and uses a usage-based pricing model with tiers and custom enterprise licensing. Its goal is to make speech-to-text accessible and accurate for diverse voices across industries.

Company Size

51-200

Company Stage

Series B

Total Funding

$81.6M

Headquarters

Milton, United Kingdom

Founded

2009

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Simplify Jobs

Simplify's Take

What believers are saying

  • Speechmatics launched Agent STT on 2026-09-17 for voice agents with 1.05% semantic error.
  • Adobe shipped on-device Premiere transcription on 2026-04-21, extending Speechmatics into creator workflows.
  • Tresic chose Speechmatics on 2026-09-09 after evaluating Google and Deepgram, validating accuracy.

What critics are saying

  • Google, Deepgram, and AssemblyAI attack Speechmatics' core transcription pricing and enterprise accounts.
  • Agent STT, Linden, and Melia signal product sprawl that distracts engineers from accuracy leadership.
  • If Adobe or LiveKit replace Speechmatics, distribution collapses quickly; enterprise exclusivity offers no moat.

What makes Speechmatics unique

  • Speechmatics pairs 55+ languages with on-device, on-prem, and cloud deployment options.
  • Linden targets voice agents; Pipecat benchmark ranked it fastest and most accurate on 2026-09-17.
  • Adobe, LiveKit, and Stenograph embed Speechmatics inside production workflows, not standalone tools.

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Benefits

Health Insurance

Dental Insurance

Flexible Work Hours

Hybrid Work Options

Paid Vacation

401(k) Company Match

401(k) Retirement Plan

Family Planning Benefits

Fertility Treatment Support

Home Office Stipend

Growth & Insights and Company News

Headcount

6 month growth

0%

1 year growth

-1%

2 year growth

-3%
Associated Press
Sep 17th, 2026
Speechmatics launches Agent STT with 1.05% semantic error rate for voice agents

Speechmatics has launched Agent STT, a speech-to-text API designed specifically for voice agents. The product aims to prevent small but critical transcription errors that can derail automated calls, such as incorrect digits in account numbers or missed negations. Agent STT is powered by Speechmatics' new Linden model, which finalises spoken segments in under 350 milliseconds and supports over 55 languages. The system includes custom vocabulary for up to 1,000 terms, live speaker diarisation and conversational event tracking. In the Pipecat STT benchmark, Linden achieved a 1.05% pooled semantic error rate with a 369-millisecond median finalisation time. According to the benchmark, no other model among 23 tested was both faster and more accurate. The API is available now, with launch pricing from $0.30 per hour, dropping to $0.16 per hour with volume discounts.

Associated Press
Sep 9th, 2026
Tresic selects Speechmatics for speech-to-text after evaluation against Google and Deepgram

Tresic has selected Speechmatics to power speech-to-text for its Intelligence Cloud platform after evaluating it against Google and Deepgram. The platform adds conversation intelligence to business calls using the vCon standard, with Speechmatics running on Tresic's own infrastructure so audio never leaves it. Both companies operate behind other brands. Tresic sells through communications and managed service providers, whilst Speechmatics supplies speech technology for voice products built by others. This reflects a broader trend in business AI, where familiar brands use third-party models behind the scenes. Tresic's platform attaches to existing voice seats without requiring installation or affecting call quality. It produces same-day summaries, converts commitments into tasks, and alerts managers when conversations meet set conditions. Speechmatics was chosen for transcription accuracy, particularly for PCI redaction compliance and diarisation across varied audio conditions including accents and background noise.

GlobeNewswire
Sep 9th, 2026
The future of AI is nameless: Tresic selects Speechmatics to power the speech layer of its conversation intelligence platform.

The future of AI is nameless: Tresic selects Speechmatics to power the speech layer of its conversation intelligence platform. End customers will only ever see their own provider's brand, which means the layer underneath has to be good enough to go unnoticed. LONE TREE, Colo. and CAMBRIDGE, United Kingdom, Sept. 09, 2026 (GLOBE NEWSWIRE) - Tresic has selected Speechmatics to power the speech-to-text layer of its Intelligence Cloud platform, following a direct evaluation against Google and Deepgram. The platform, built on the vCon standard, adds conversation intelligence to calls a business is already making. Speechmatics runs as part of Tresic's own infrastructure, so audio and transcripts never leave it. "Every summary and search result depends on knowing who spoke and what they actually said, so diarization and accuracy carry more weight here than they would..." "Our partners have spent years earning trust with these customers, and it is their name that goes on this. That decided how we chose the speech layer..." "Every summary and search result depends on knowing who spoke and what they actually said, so diarization and accuracy carry more weight here than they would..." "Our partners have spent years earning trust with these customers, and it is their name that goes on this. That decided how we chose the speech layer..." Both companies sell into products that carry somebody else's brand. Tresic goes to market through communications and managed service providers. Speechmatics supplies the speech layer inside voice products that other builders and enterprises ship. A business deals with its own provider throughout and never has to think about who built what. That is becoming the standard route for business AI. From Slackbot to QuickBooks to Zoom's AI Companion, and most recently Apple Intelligence, the same shape keeps appearing through 2026: a familiar brand on the surface, somebody else's models behind it. Gartner expects it to stay that way. With AI in what the firm calls the Trough of Disillusionment through 2026, it says AI will most often reach enterprises through their incumbent software provider rather than arrive as a new project. How it works Tresic attaches to the voice seats a provider already sells. Nothing is installed on the customer's side, nobody invites a bot into a call, and staff answer the phone the way they always have. Where the seat is already recording, every analyzable business conversation produces a record. The platform is never in the call path: it cannot drop a call, add delay, or affect call quality. From that record, the business gets a summary the same business day, and every commitment becomes a task with an owner and a due date. When a conversation meets conditions the business has set, a manager is alerted within minutes of hang-up. Conversation history is searchable by person, number, and topic. "Our partners have spent years earning trust with these customers, and it is their name that goes on this. That decided how we chose the speech layer. Speechmatics does one of the hardest parts of the job and takes none of the credit, which is the same arrangement we offer our partners." Kevin Nethercott, Co-Founder and CEO, Tresic Why Speechmatics was selected Summaries, alerts, and search all rest on getting the words right, and redaction shows the stakes most clearly. A card number spoken aloud can only be masked if the system heard it correctly, and one wrong digit means it is not masked at all. Tresic names PCI redaction as the foundation layer of its platform, which puts transcription accuracy in the category of compliance controls. The audio makes that harder than it sounds. These are calls from vans, depots, shop floors, and open-plan offices, in accents from everywhere, with nobody reading from a script. Consistency across the test set and accuracy on exactly that kind of audio decided the evaluation. Deployment was the second condition. Because partners badge the platform as their own, conversation data has to stay inside infrastructure they can account for to their customers, so both passes run on Tresic's own hardware: one tuned for speed, one tuned for accuracy, so the record is right. "Every summary and search result depends on knowing who spoke and what they actually said, so diarization and accuracy carry more weight here than they would on cleaner audio. Running inside Tresic's own infrastructure costs them nothing in accuracy, which is usually the trade people expect to make. The version that works is the one nobody has to think about." Katy Wigdahl, CEO, Speechmatics All of it rests on vCon, the open IETF-track standard for conversation data, which keeps a provider's conversations portable and readable outside the platform. Data is separated by partner, customer, and location. About Tresic Tresic adds conversation intelligence to the voice seats communications and managed service providers already sell, so every business conversation ends in a summary, a captured commitment, or an alert to the person who needs it. Partners carry it under their own brand, at their own price, to the customers they already serve. The platform is built on vCon, the open IETF-track standard for conversation data, and is distributed through the channel only. Tresic is headquartered in Lone Tree, Colorado. Intelligence, Actioned. Visit tresic.cloud. Media Contact: Jennifer Singer, Chief Commercial Officer, [email protected] About Speechmatics Speechmatics builds foundational speech technology for file transcription, real-time captioning, and voice agent applications. Its APIs help global businesses understand every voice across languages, accents, dialects, demographics, and locations. Processing over 500 years of audio globally each month in 55+ languages, Speechmatics is headquartered in Cambridge, UK.

Yahoo Finance
Aug 27th, 2026
Speechmatics launches Linden voice AI model on LiveKit for 55+ languages

Speechmatics has launched Linden, a speech-to-text model designed for voice agents, now available through LiveKit Inference across over 55 languages. Developers can integrate the model in under a minute via UI or code. The model addresses accuracy issues in real-world conditions where voice agents struggle, including strong accents, noisy environments, and alphanumeric sequences over poor-quality phone lines. Linden specialises in transcribing non-native speakers, dialects, and account numbers. LiveKit Inference manages the pipeline, routing, billing, and turn detection, eliminating the need for separate API keys or accounts. Norwegian AI company boost.ai already deploys both technologies in production for European enterprise clients. The partnership aims to reduce deployment time from weeks to minutes whilst improving transcription reliability in challenging production scenarios.

GlobeNewswire
Aug 27th, 2026
Speechmatics and LiveKit target the accuracy gap breaking voice agents in production.

Speechmatics and LiveKit target the accuracy gap breaking voice agents in production. Linden, Speechmatics' new speech-to-text model, is available now through LiveKit Inference, enabling developers to build reliable voice agents at scale across 55+ languages. CAMBRIDGE, United Kingdom, Aug. 27, 2026 (GLOBE NEWSWIRE) - From today, developers building voice agents on LiveKit Inference can switch to Speechmatics in less than a minute through the UI or code. Linden, the first Speechmatics model purpose-built for voice agents, is available through LiveKit Inference, LiveKit's platform for using leading voice AI models from one place. That means no separate API key, account or invoice. "LiveKit Inference exists so developers can ship and iterate fast, without the headache of managing API keys or rewriting their stack every time a model..." "What separates an agent people trust from one they find exhausting is whether it can understand what you said. Our new model solves for this. Linden not only..." "Voice agents live or die on the STT layer. Speechmatics gives us what actually matters in production: low-latency real-time models, fast iteration on the..." "LiveKit Inference exists so developers can ship and iterate fast, without the headache of managing API keys or rewriting their stack every time a model..." In a demo scenario, a voice agent typically hears one speaker, clean audio and a short exchange where all STT providers perform well. Real-world production is rarely that tidy: a caller with a strong accent, a noisy cafe, a 16-digit card number read out over a low quality phone line. When the transcript breaks on the words that matter, everything downstream breaks with it. Together, LiveKit and Linden solve that problem for the builder. Linden gets the words right where it is hardest: 55+ languages, non-native speakers and strong accents, and alphanumerics such as account and card numbers read out over a bad line. LiveKit Inference handles the pipeline, the routing, the billing and the turn detection that decides when the agent speaks. Adopting a speech provider used to take weeks, now it's something you can simply select. "What separates an agent people trust from one they find exhausting is whether it can understand what you said. Our new model solves for this. Linden not only excels at 55+ languages, but also transcribing non-native speakers, dialects, and accents. LiveKit built the infrastructure that made those deployments possible, and its community has worked out what production voice AI actually takes, in the real world, faster than anyone else." Ricardo Herreros-Symons, CRO, Speechmatics Norwegian conversational AI company boost.ai already runs Speechmatics and LiveKit in production across the voice agents it builds for European enterprises, on infrastructure that also powers xAI Grok and Salesforce Agentforce. "Voice agents live or die on the STT layer. Speechmatics gives us what actually matters in production: low-latency real-time models, fast iteration on the hard edges like alphanumerics and end-of-utterance, and serious language breadth across Europe. Just as importantly, the people behind it are a pleasure to work with; close, hands-on, and genuinely invested in getting things right." Rasmus Hauch, CTO, boost.ai LiveKit Inference, launched in October 2025, lets developers build a voice agent in minutes. A single API key calls the most popular STT, LLM and TTS models, and models swap with a one-line code change. Consolidated billing, rate-limit management and usage reporting all run through LiveKit Cloud. Speechmatics is available natively through LiveKit Inference, via the Speechmatics plugin for LiveKit Agents Open Source framework or through LiveKit's Agent Builder. "LiveKit Inference exists so developers can ship and iterate fast, without the headache of managing API keys or rewriting their stack every time a model changes. Adding Speechmatics equips voice agents with exceptional speaker diarization that clearly tracks who said what with any number of speakers from day one. This capability is especially powerful for physical AI and real-world multi-speaker environments." David Zhao, CTO & Co-founder, LiveKit About Speechmatics: Speechmatics builds the most accurate and inclusive speech recognition in the world, trusted by enterprises across financial services, media, contact centers and government for unmatched language coverage, accuracy, and flexibility. About LiveKit: LiveKit is the open source framework and cloud platform for voice, video, and physical AI agents. Used by developers and enterprises worldwide, LiveKit powers realtime, multimodal AI applications at scale - from customer support and telephony to robotics and consumer products. The company is headquartered in San Francisco. Learn more at livekit.com. Media Contact Mieke Smith // [email protected]