Senior Software Engineer – Front-End
Speechmatics · London, England, United Kingdom · On-site
Posted Sep 25, 2026
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At Speechmatics, we’re expanding our user platform offering. We're looking for a Senior Front-End Software Engineer with a strong product mindset to help drive that growth. This is an opportunity to own end-to-end feature development at a leading-edge AI company, from shaping the user experience through to shipping and iterating based on real user feedback and analytics data.
What you'll do
Own product features from ideation through to delivery, contributing to UX thinking, frontend execution, and post-launch iteration
Build polished, accessible user interfaces using React, JavaScript, HTML, and CSS
Make UX and UI decisions independently, collaborating closely with designers and PMs rather than waiting on detailed handoffs
Design and run A/B tests to validate product decisions and surface insights that improve the user experience
Use analytics tooling such as Mixpanel to understand how people interact with the product and feed that learning back into what gets built
Partner with backend engineers, product managers, and designers to ship features that genuinely move the needle for users and the business
Write and maintain robust UI tests, taking ownership of quality in production and at scale
Run user interviews and meet customers to understand how people use the product and what drives adoption
What you'll need
Proficiency in React, JavaScript, HTML, and CSS with a track record of shipping production-quality frontend code
A product-minded engineering approach
Comfort owning UX and UI decisions independently
Hands-on experience with iterative development practices, including A/B testing and feature experimentation
Familiarity with user analytics tools such as Mixpanel or a comparable platform
Experience with UI testing frameworks and a solid grounding in frontend engineering best practices
Confidence collaborating cross-functionally with designers, PMs, and backend engineers
A track record of using user feedback and data to improve features
Nice to have
Experience using coding agents (eg Claude, Codex, OpenCode) to improve productivity and code quality
Exposure to backend development, including RESTful APIs and cloud deployments
Experience conducting or participating in user interviews as part of a product discovery process
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, and uses AI and Machine Learning to unlock business value in human speech worldwide. We work with an amazing mix of global companies, and our technology can integrate into our customers stack irrespective of…