> Markdown version of [/jobs/ext/351337-staff-backend-engineer-voices](https://www.wearedevelopers.com/jobs/ext/351337-staff-backend-engineer-voices). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Staff Backend Engineer, Voices - **Company:** Synthesia Limited - **Location:** London, UK (Remote available) - **Contract:** Permanent contract - **Skills:** Application Programming Interfaces (APIs), Artificial Intelligence, Software Debugging, Design of User Interfaces, Recommender Systems, Systems Integration, System Availability, Backend, Speech Synthesis, Front End Software Development - **Published:** June 18, 2026 - **Apply:** https://uk.indeed.com/viewjob?jk=da63bdb0fd0679ad ## About the Role Do you have experience in Communication skills?, * You have experience building and shipping product features end-to-end in production environments. * You have a strong product mindset and can take ambiguous problems, define scope, and iterate towards solutions that deliver user value. * You are comfortable working in 0 to 1 environments, experimenting, prototyping, and learning quickly rather than relying on detailed upfront specs. * You can evaluate technical feasibility and make pragmatic trade-offs, especially when working with external systems (like TTS providers) and evolving requirements. * You care about reliability and user experience, aiming to build features that work consistently in real-world usage. * You are confident collaborating with product and design, including pushing back when something is not feasible and proposing better alternatives. * You are willing to debug and work across the stack, wherever the problem is. Experience with audio/speech systems, TTS, API orchestration, provider integrations, or quality evaluation frameworks is a plus, but not required. ## Description You will work on the core speech and voice generation experience at Synthesia, building the platform that sits at the critical path of script creation and video generation. You will design and deliver features across the script preview and voice orchestration stack, combining frontend user experiences with backend platform reliability. This includes integrating with multiple Text-to-Speech (TTS) providers, building recommendation systems, and ensuring consistency and quality across all voice outputs. You will take ownership of features from idea through to production, working with loosely defined requirements to scope, prototype, and ship solutions that deliver real user impact. You will build across the stack, including: * Backend systems for TTS provider orchestration, handling fallbacks, retries, and load-shedding across multiple providers * Frontend experiences that allow users to preview scripts, select voices, and control pronunciation with intuitive interfaces (frontend experience is not a must!) * Voice discovery and recommendation systems that guide users to high-quality voices and help them iterate quickly You will frequently work on 0 to 1 problems, such as building new voice quality frameworks, improving voice recommendations across languages, and introducing new TTS capabilities where experimentation and iteration are critical to success. You will collaborate closely with product, design, and AI teams to: * Translate user problems into experiments and features * Evaluate what works reliably across different TTS providers and reliability constraints * Iterate quickly based on feedback, user testing, and voice quality data You will ship features behind feature flags, measure outcomes, and continuously refine based on product and user signals., * 45min call with an Engineering Manager about your past projects * 90min Live Coding interview, a collaboration exercise with our Engineer (not Leetcode style) * 60min System Design, technical discussion usually about a real problem we had in production * 45min call with leadership, focus on examples of collaboration, growth and going through details of your future team You can find more details on what to expect and how to prepare HERE. The process does not need to take long - we can be done in seven working days. ## Related Videos - [Raise your voice!](https://www.wearedevelopers.com/videos/10-raise-your-voice) - [Building a Browser-Based Karaoke Game with Web Speech API](https://www.wearedevelopers.com/videos/1274-building-a-browser-based-karaoke-game-with-web-speech-api) - [Using AI Without Losing Your Skills](https://www.wearedevelopers.com/videos/2045-using-ai-without-losing-your-skills) - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [Is the web ready for voice user interfaces?](https://www.wearedevelopers.com/videos/1142-is-the-web-ready-for-voice-user-interfaces) - [What I learned as a developer from accidents in space](https://www.wearedevelopers.com/videos/642-what-i-learned-as-a-developer-from-accidents-in-space) ## Related Articles - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Navigating the AI Shift](https://www.wearedevelopers.com/magazine/629-navigating-the-ai-shift) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Dev Digest 137 - AI'm not sure about this](https://www.wearedevelopers.com/magazine/485-dev-digest-137-ai-m-not-sure-about-this) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers)