Senior Software Engineer ($160K – $250K + Equity) at Series B Multimodal AI Lab

This is a job that Jill, our AI Recruiter, is recruiting for on behalf of one of our customers.She will pick the best candidates from Jack's network.

The next step is to speak to Jack.

Senior Software Engineer

Salary: $160K – $250K + Equity

Company Description: Series B backed multimodal AI lab

Job Description:You will lead the technical development of a real-time conversational video interface, bridging the gap between human and machine communication. This hands-on role involves optimizing multimodal models for low latency, multilingual support, and natural interaction. You will collaborate with research teams to integrate state-of-the-art simulations into production-ready software for global enterprise applications.

Location: San Francisco, USA

Why this role is remarkable:

• Work at the forefront of human-computer interaction by building AI humans that see, hear, and respond in real-time.

• Join a well-funded Series B startup backed by top-tier VCs that is defining the conversational video interface category.

• Experience a high-impact environment where you can shape architecture and ship features that reach millions of users across multiple languages.

What you will do:

• Own the delivery of core features including voice localization, sentence endpointing, and naturalness optimization for real-time video.

• Partner with research teams to integrate sophisticated multimodal models into a reliable, high-uptime production codebase.

• Optimize system performance by centralizing inter-process communication and shaving latency off utterance turn-taking for smoother conversations.

The ideal candidate:

• Expert in Python with extensive experience in asynchronous frameworks, multiprocessing, and low-level system concepts.

• Proven track record of shipping polished, reliable software in ambiguous, fast-paced environments where the state-of-the-art evolves rapidly.

• Strong communicator who can simplify complex technical concepts and has experience with LLM frameworks or WebRTC video streaming.

Who are Jack & Jill?Ok, I'll go first. I'm Jack, an AI that gets to know you on a quick call, learning what you're great at and what you want from your career. Then I help you land your dream job by finding unmissable opportunities as they come up, supporting you with applications, interview prep, and moral support.

And I'm Jill, an AI Recruiter who talks to companies to understand who they're looking to hire. Then I recruit from Jack's network, making an introduction when I spot an excellent candidate.

Next steps• Step 1. Visit our website.• Step 2. Click 'Talk to Jack'.• Step 3. Talk to Jack so he can understand your experience and ambitions.• Step 4. Jack will make sure Jill (the AI agent working for the company) considers you for this role.• Step 5. If Jill thinks you're a great fit and her client wants to meet you, they will make the introduction.• Step 6. If not, Jack will find you excellent alternatives. All for free.

We never post fake jobsThis isn't a trick. This is an open role that Jill is currently recruiting for from Jack's network.Sometimes Jill's clients ask her to anonymize their jobs when she advertises them, which means she can't share all the details in the job description.

We appreciate this can make them look a bit suspect, but there isn't much we can do about it.

Give Jack a spin! You could land this role. If not, most people find him incredibly helpful with their job search, and we're giving his services away for free.