Senior AI Engineer Job at SonicJobs, San Francisco, CA

dGJsMXpOeDE1L1cvRjJOelkyUU9XVVdUaFE9PQ==
  • SonicJobs
  • San Francisco, CA

Job Description

Who we are

At SonicJobs we’re building the next generation of autonomous web agents based on computer-use technologies . Our agents operate on job application flows, like candidates do. If you’ve ever dreamed of building AI that actually uses a website , this is your moment.

We’re a small, tight-knit team with big ambitions, leveraging bleeding-edge tools to build agents that understand and control web environments end-to-end.

We move fast, avoid unnecessary hierarchy, and aim high. We’re not automating job applications - we’re redefining how job applications work in order to allow candidates find the job opportunity they deserve.

We are backed by top VC firms and serve more than one hundred corporate clients including several Fortune 500 companies.

About the role

We’re looking for a Senior AI Engineer with 7+ years of experience to own the architecture, training, and evolution of our AI agent stack. As Senior AI Engineer , you’ll be responsible for fine-tuning LLMs that will support web-native agents capable of learning, adapting, and thriving in complex job application flows.

This is a demanding, high-impact role . You’ll be shipping code, training models, designing experiments, and setting our strategy at the same time. You’ll be reporting to the CTO. If you’re excited by the idea of coding, reviewing training runs, and designing new RL environments - you’ll thrive here. You’ll also be mentoring and growing junior colleagues to bring their agentic skills to a level of excellence.

What you'll do

  • Build, train, and deploy LLM-driven agents that control the web via real browser interfaces.
  • Fine-tune foundation models for computer-use using techniques like LoRA, PEFT, DPO, RLHF and similar depending on your judgment.
  • Design and run reinforcement learning systems to improve agent reasoning and performance.
  • Own the full agent stack: from policy models to interface planning & simulation frameworks.
  • Prototype quickly, test aggressively, and constantly push the limits of what agents can do.
  • Create multi-agent flows with clear trajectories, role assignment, and long/short memory.

What you'll bring

  • Strong ML background - PhD or equivalent experience in AI, ML, Computer Science or a strong industry experience.
  • Real experience fine-tuning LLMs.
  • Deep understanding of Reinforcement Learning (especially applied, not just theoretical).
  • Experience building agents in real-world environments (bonus for browser-based or robotic agents).
  • You’re hands-on: you like writing code, running experiments, and seeing real results.
  • You’re driven by ownership, not job titles. You’re here to build, not manage for the sake of it.

Bonus points for

  • Track record of high-impact research published on meaningful or open-source contributions.
  • Comfort working in fast-paced, exciting startup environments.

What we offer

  • $200K–$250K salary + equity.
  • Onsite work with a deeply focused, no-BS team.
  • Real ownership and the chance to shape a frontier space.
  • No corporate nonsense - just smart people building ambitious tech.

Sounds like you?

Let’s talk. This isn’t just a job - it’s a chance to lead the future of how job platform technology looks like.

Job Tags

Similar Jobs

CompHealth

Physician / Family Practice / Massachusetts / Permanent / An Addiction Medicine Physician Is Needed in Lynn, Massachusetts Job Job at CompHealth

 ...bonus, life insurance, and a 403(b) with a 4% match See 20 - 25 patients per day Must be board certified in internal medicine or family medicine Addiction medicine fellowship preferred J-1 and H-1B visas are welcome to apply 4 miles north of Boston Our services are free... 

LF Bioenergy

Plant Operator Job at LF Bioenergy

 ...or time off in lieu of, for call-outs ~ Statutory holidays in the State of Wisconsin ~2 weeks of additional paid time off ~ Medical, Dental, and Vision plan ~ Flexible spending account or Health Spending Account available ~ Long-term disability and life insurance... 

ATP Global Talent

Summer Intern Job at ATP Global Talent

 ...customer engagement. Gain a thorough understanding of our products and services, providing accurate and timely information to customers...  ...in a fast-paced environment. Company Perks: Paid internship with a competitive compensation package. Comprehensive training... 

Powerback Rehabilitation

Physical Therapist Job at Powerback Rehabilitation

Overview: At Powerback, we're on a mission to improve lives. As the leader in physical, occupational, speech, and respiratory therapies, we help older adults stay active and thrive while providing essential therapy for children at home and in school. With over 38 years...

City of Cape Girardeau

Air Traffic Controller Job at City of Cape Girardeau

 ...between aircraft by organizing and expediting the flow of air traffic for the City of Cape Girardeau. Essential Functions Provides...  ...personnel on the airport; coordinates with other air traffic control agencies to ensure the safe movement of aircraft; relays all...