Full-Stack Engineer (Backend Leaning) - ElevenAI

About ElevenLabs ElevenLabs is an AI research and product company transforming how we interact with technology. We launched in January 2023 with the first human-like AI voice model. Today, we serve millions of users and thousands of businesses - from fast-growing startups to large enterprises like Deutsche Telekom and Meta. Our investors are some of the world's most prominent, including Andreessen Horowitz, ICONIQ Growth and Sequoia. We've raised $781M in funding and our last valuation was $22B - multiples of 11, always. We have expanded from voice into three main platforms: ElevenAgents enables businesses to deliver seamless and intelligent customer experiences, with the integrations, testing, monitoring, and reliability necessary to deploy voice and chat agents at scale. ElevenCreative empowers creators and marketers to generate and edit speech, music, image, and video across 70+ languages. ElevenAPI gives developers access to our leading AI audio foundational models. Everything we do is the result of the creativity and commitment of our team - builders doing the best work of their lives. We are researchers, engineers, and operators. IOI medalists and ex-founders. If you want to work hard and create lasting positive impact, we want to hear from you. How we work High-velocity: Rapid experimentation, lean autonomous teams, and minimal bureaucracy. Impact not job titles: We don’t have job titles. Instead, it’s about the impact you have. No task is above or beneath you. AI first: We use AI to move faster with higher-quality results. We do this across the whole company—from engineering to growth to operations. Excellence everywhere: Everything we do should match the quality of our AI models. Global team: We prioritize your talent, not your location. What we offer Innovative culture: You’ll be part of a generational opportunity to define the trajectory of AI, surrounded by a team pushing the boundaries of what’s possible. Growth paths: Joining ElevenLabs means joining a dynamic team with countless opportunities to drive impact - beyond your immediate role and responsibilities. Learning & development : ElevenLabs proactively supports professional development through an annual discretionary stipend. Social travel : We also provide an annual discretionary stipend to meet up with colleagues each year, however you choose. Annual team offsite: Each year, we bring your entire team together in a new location - past offsites have included Croatia, Italy and Cancún Co-working : If you’re not located near one of our main hubs, we offer a monthly co-working stipend. About the role We are looking for a backend-leaning full-stack engineer to build the systems behind ElevenAI, our new voice-first AI assistant for dictation, meetings and everyday work. ElevenAI started life as a dictation tool our own team uses every day, and it is now launching to the world. The product has to feel instant and be dependable the first time, every time. It also handles some of the most sensitive things people say at work, so reliability, privacy and security are part of the job from day one. You will join a small team with a live product and a lot of open ground, with ownership from the services and AI pipelines through to the experience people see. You will help discover what works, turn experiments into reliable features, and use real user feedback to decide what we build next. Your responsibilities will include: Designing and operating the real-time backend behind ElevenAI: streaming speech-to-text, long-running meeting and notes workflows, and the services behind our web, desktop and mobile apps. Building AI-powered features that people can rely on, including summaries, actions and integrations with the tools people already use, such as calendars and meeting platforms. Developing evaluations and live quality monitoring so we know when the product gets better, or worse, for real users. Owning reliability in production, with strong observability, security and data-handling practices, and taking part in the on-call rotation. Owning features end to end, shipping across the stack and into the frontend when needed, alongside product, design and engineering. Requirements We care about evidence of exceptional engineering: products you have shipped, difficult problems you have solved, and systems you have owned. Strong backend engineering skills and experience operating production systems, with sound fundamentals in APIs, cloud infrastructure, storage and asynchronous processing. Experience building reliable real-time systems, such as streaming, WebSockets and background workers, and recovering from failures gracefully. Hands-on experience shipping LLM-powered features, with an understanding of prompts, tools, retrieval and evaluations. Strong product sense and evidence of independent, end-to-end ownership, with the confidence to work across the stack when needed. Comfortable in a small, fast-moving team, with clear communication and good judgement about what to build next. Bonus: experience with speech or audio systems, calendar and meeting integrations, handling privacy-sensitive user data, or backends for mobile clients. Location This role is remote-first, so it can be executed globally, with the ability to operate in GMT-5 to GMT+8 timezones required. If you prefer, you can work from our offices in London, New York, and Warsaw. We are an equal opportunity employer and do not discriminate on the basis of race, religion, national origin, gender, sexual orientation, age, veteran status, disability or other legally protected statuses.