Skip to content

Senior Software Engineer Inference

AssemblyAI
senior
Work Type

Remote

Open to applicants in

United Kingdom

Seniority

senior

Posted

August 28, 2026


Expected Salary
$100-400k
Want to apply for this job?

Subscribe to access the application link and 15,000+ more jobs

Job Description

Why AssemblyAI

AssemblyAI builds the best-in-class Voice AI models powering the next generation of voice applications.

Our models serve 600M+ inference calls monthly process 1M+ hours of audio daily and power 2 billion+ end-user experiences.

The Voice AI space is at an inflection point; we’re looking for folks truly excited to join a small team and help define the future of the industry.

We are one of the most capital-efficient AI companies on the planet - with under 100 people generating roughly $500K ARR per employee we sit among the top 5 most revenue-dense teams within the fastest-growing AI companies today.

That's not an accident; it's a deliberate choice to stay lean move fast and give every person on the team outsized ownership and impact.

With thousands of customers including Granola Fireflies Figure AI and CallRail the company has real scale - processing over 2 million hours of audio daily and handling more than 1 million API calls every day.

This is a rare growth-stage opportunity where the business is proven and the trajectory is steep but the team is still small enough that your fingerprints are on everything.

If you've ever felt buried under layers of bureaucracy starved of real ownership or frustrated watching your work disappear into a slow-moving org AssemblyAI is built differently.

The company operates as a true meritocracy with no heavy planning or approval processes and no gatekeeping on the tools or information you need.

For anyone who genuinely cares about voice AI not as a trend to chase but as a technology to build   this is the place where the most interesting problems at the most interesting scale are being solved by a team small enough that you'll actually know everyone's name.

We’re committed to creating a space where our employees can bring their full selves to work and have equal opportunity to succeed.

No matter your race gender identity or expression sexual orientation religion origin ability age veteran status if joining this mission speaks to you we encourage you to apply!

About the role:

We're hiring a Software Engineer to help turn cutting-edge AI research into products our customers rely on every day.

You'll sit on a fast-paced engineering team between our research org and our Applied teams taking new model capabilities from proof of concept to robust well-documented APIs serving production traffic at scale.

What You’ll Do:

  • Design and ship customer-facing APIs that expose new model capabilities owning them from prototype through launch and ongoing iteration.
  • Scale inference infrastructure to support our 1M+ api users
  • Partner with researchers to productionize new techniques.

    For example turning a notebook or POC into something with the latency reliability and ergonomics customers expect.

  • Work with our customers and Applied teams to understand how users are building with our products and feed that back into product design and research direction.
  • Contribute across the stack as needed: backend services inference infrastructure SDKs internal tooling.

What You’ll Need:

  • Strong backend engineering experience including building and supporting machine learning infrastructure and/or customer-facing APIs in production.
  • Comfort operating with ambiguity.

    Research timelines and product timelines don't always line up and you're energized rather than frustrated by that.

  • Genuine curiosity about AI/ML.

    You don't need to be a researcher but you should want to understand what the models are doing well enough to make good engineering decisions around them.

  • Strong collaboration skills.

    You'll be working daily with researchers applied engineers and sometimes customers people with very different contexts and priorities and the role only works if you enjoy that.

Pay Transparency:

AssemblyAI strives to recruit and retain exceptional talent from diverse backgrounds while ensuring pay equity for our team.

Our salary ranges are based on paying competitively for our size stage and industry and are one part of many compensation benefit and other reward opportunities we provide.

There are many factors that go into salary determinations including relevant experience skill level qualifications assessed during the interview process and maintaining internal equity with peers on the team.

The range shared below is a general expectation for the function as posted but we are also open to considering candidates who may be more or less experienced than outlined in the job description.

In this case we will communicate any updates in the expected salary range.

The provided range is the expected salary for candidates in the United Kingdom.

Outside of those regions there may be a change in the range which will be communicated to candidates throughout the interview process.

Salary range:  £120 000 -  £145 000

AI to Interview:

If you’re selected for an interview please review this resource to better understand how AssemblyAI approaches the use of AI in our interview process.

GDPR privacy notice:

Candidates from the EU should review this job applicant privacy notice before applying. 

Keep Exploring AssemblyAI:

Speech-to-text | Streaming speech-to-text | Speech Understanding | LLM Gateway
Try the Playground
Our $50M Series C fundraise
Check us out on YouTube!

More Jobs You Might Like
Customer Success Account Manager (Early In Profession)

Microsoft

Bucharest

Helpful Resources
Salary & Savings Calculator

Compare salaries across European cities and calculate your potential savings. Understand cost of living and take-home pay for tech jobs in Europe.

Career Guides

Expert advice on landing high-paying tech jobs in Europe. Tips on interviews, salary negotiation, and career growth from The European Engineer.

Access 15,000+ High-Paying Tech Jobs

Get unlimited access to our full database of 15,000+ jobs with advanced filters, salary comparisons, and exclusive career guides from The European Engineer.