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Senior Software Engineer, Inference

AssemblyAIUnited KingdomEngineering
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Salary
£120K - £145K GBP
Job type
Full-time
Posted
28 Aug 2026
Status
Open · checked 7d ago

About this role

Role Overview

The Senior Software Engineer, Inference role at AssemblyAI involves transforming cutting-edge AI research into robust production products for customers in the United Kingdom. This position suits a skilled backend professional who enjoys bridging the gap between research and applied product engineering.

Key Responsibilities

Design, ship, and own customer-facing APIs that expose new model capabilities from prototype through launch and ongoing iteration.
Scale inference infrastructure to support over one million API users.
Partner closely with researchers to productionize new techniques, converting research notebooks into reliable, low-latency, and user-friendly production systems.
Collaborate with customers and Applied teams to understand product usage, feeding insights back into product design and research direction.
Contribute across the technology stack as needed, including backend services, inference infrastructure, SDKs, and internal tooling.

Requirements

Strong backend engineering experience, featuring the creation and support of machine learning infrastructure or customer-facing APIs in production.
Comfort operating effectively within ambiguous environments where research and product timelines differ.
Genuine curiosity about artificial intelligence and machine learning technologies.
Strong collaboration skills for working daily with researchers, applied engineers, and customers.

Skills and Tools

Backend Engineering
Machine Learning Infrastructure
API Development
Inference Scaling
LLM

Salary and Benefits

Annual salary range of £120,000 to £145,000 for candidates located in the United Kingdom.
Compensation is determined by relevant experience, skill level, qualifications assessed during interviews, and internal equity.

About the Company

AssemblyAI builds best-in-class Voice AI models that power the next generation of voice applications, serving massive monthly inference calls and daily audio processing. Operating as a lean and capital-efficient team of under 100 people, the company fosters a true meritocracy with high ownership and impact. Customers include industry names like Granola, Fireflies, Figure AI, and CallRail.

How to Apply

Visit the official AssemblyAI careers page to submit your application for this opportunity.

Skills and tech stack

LLM

Questions candidates ask

What is the location for this role?

This position is located in the United Kingdom.

What is the salary range for the Senior Software Engineer, Inference position?

The expected annual salary range for candidates in the United Kingdom is between £120,000 and £145,000.

What are the primary responsibilities of the role?

Responsibilities include designing and shipping customer-facing APIs, scaling inference infrastructure for millions of API users, and partnering with researchers to productionize new techniques.

Do I need to be an AI researcher to apply?

No, you do not need to be a researcher, but you should have genuine curiosity and enough understanding of what the models are doing to make good engineering decisions.

How do I apply for this position?

You can apply directly through the official AssemblyAI careers page.

Ready to apply?

The application is on the official AssemblyAI careers page.

Apply on company site