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Backend Engineer

Remote · London

Senior level

We are looking for an engineer to join our small and mighty team to build the backend systems that power our conversational voice experiences and LLM-driven digital environments. You’ll play a key role in designing and building scalable, high-performance backend services that interface with real-time audio streaming, voice and language models, and personalised content generation. You’ll work closely with the rest of the team to ensure seamless integration across product, infrastructure, and AI components.

Recent examples of backend challenges we’ve tackled include:

• Real-time WebRTC audio streaming with Whisper transcription and LLM orchestration.

• Dynamic conversational agents that can be interrupted mid-speech and resume naturally.

• Integrating generative image and voice services into a unified pipeline.

• Orchestrating cloud infrastructure for low-latency inference across multiple models.

Why Amble

• The opportunity to rethink and reshape the future of language learning and human connection.

• Work in a closely kit in-person team. You will be a core member of the founding team and directly shape the future of the company.

• You will be faced with and solve hard problems across product and engineering along the way, many of which will require breaking new technical ground.

• We have backing of some of the best VCs in the world, including the early investors in Anthropic, Notion, Replit, Vimeo and Patreon.

Qualifications

• 5+ years of backend engineering experience, with strong expertise in Python. Deep experience with FastAPI or similar Python web frameworks is a must.

• Experience leading tech critical projects within your team and organisation.

• Experience building and scaling LLM-powered applications, particularly those involving visual AI, agentic workflows, or voice-based AI interactions.

• Comfortable designing and implementing scalable, production-grade systems on cloud infrastructure with high reliability and low latency.

• Strong software engineering fundamentals with the ability to pragmatically think through sensible and robust software design and architecture.

• You can ship at high velocity without compromising on quality and are comfortable figuring out how to build things you haven't built before.

• Experience working with WebRTC or real-time media streaming technologies is desirable.

• Experience working with frontend technologies (React, Typescript) is an asset.

Our stack