Machine Learning Engineer

2 Months ago • All levels • Research Development • $120,000 PA - $220,000 PA

Job Summary

Job Description

HappyRobot is seeking a Machine Learning Engineer to build AI models for human-like conversations, working at the intersection of speech, language, and intelligence. This role involves transforming cutting-edge research into real-time, scalable systems. The engineer will own the entire lifecycle of ML systems, from design to deployment, and contribute to the company's fast growth in the logistics industry. Responsibilities include designing, building, and optimizing ML models, creating scalable pipelines, staying updated on AI research, collaborating with product and engineering teams, and ensuring robustness and efficiency of AI systems. The company is backed by a16z and YC, offering a high-growth environment with significant impact potential.
Must have:
  • Strong experience in machine learning, deep learning, and NLP.
  • Hands-on experience with PyTorch, TensorFlow, or JAX.
  • Solid coding skills in Python; familiarity with production ML practices.
  • Ability to design and optimize models for performance and scalability.
  • Passion for AI and product impact.
  • Founder mindset: Hard work, independence, and ownership.
Good to have:
  • Experience in speech recognition, TTS, or audio processing.
  • Knowledge of LLMs, generative AI, or real-time systems.
  • Experience in startup environments and fast iteration cycles.
  • Familiarity with MLOps tools (e.g., MLflow, Weights & Biases).
Perks:
  • Opportunity to work at a high-growth AI startup.
  • Fast growth backed by a16z and YC.
  • Ownership and autonomy.
  • Top-tier compensation (competitive salary + equity).
  • Comprehensive Benefits (Healthcare, dental, vision coverage).
  • Work with a world-class team of engineers and builders.

Job Details

About Happyrobot

HappyRobot is a platform to build and deploy AI workers that automate communication. 

Our AI workers connect to any system or data source to handle phone calls, email, messages…

We target the logistics industry which relies heavily on communication to book, check on, & pay for freight. Primarily working with freight brokers, 3PLs, freight forwarders, shippers, warehouses, & other supply chain enterprises and tech startups.

We raised a Series A round from a16z and YC and we’re growing very fast.

We're looking for rockstars with a relentless drive, unstoppable energy, and a true passion for building something great—ready to embrace the challenge, push limits, and thrive in a fast-paced, high-intensity environment.

About the Role

You’ll be building AI models that make human-like conversations possible. You’ll work at the intersection of speech, language, and intelligence, taking cutting-edge research and transforming it into real-time, scalable systems that power our core products. You’ll have the unique opportunity to make a huge impact as one of our first ML hires, shaping not only the technology but also the direction of our company. From designing robust models to deploying them in production, you’ll own the entire lifecycle of ML systems and help us stay ahead of the curve in AI innovation.

Responsibilities

  • Design, build, and optimize ML models for speech and language understanding.

  • Build and maintain scalable pipelines for training, testing, and deploying models.

  • Stay up-to-date with the latest in AI research and help us stay ahead of the curve.

  • Collaborate closely with product and engineering teams to integrate models into our core products.

  • Ensure robustness, efficiency, and low-latency in all production AI systems.

Must Have

  • Strong experience in machine learning, deep learning, and NLP.

  • Hands-on experience with PyTorch, TensorFlow, or JAX.

  • Solid coding skills in Python; familiarity with production ML practices.

  • Ability to design and optimize models for both performance and scalability.

  • Passion for AI and product impact.

  • Founder mindset: Hard work + independence + ownership.

Nice to Have

  • Experience in speech recognition, TTS, or audio processing.

  • Knowledge of LLMs, generative AI, or real-time systems.

  • Experience in startup environments and fast iteration cycles.

  • Familiarity with MLOps tools (e.g., MLflow, Weights & Biases).

Why join us?

  • Opportunity to work at a high-growth AI startup, backed by top investors.

  • Fast Growth - Backed by a16z and YC, on track for double-digit ARR.

  • Ownership & Autonomy - Take full ownership of projects and ship fast.

  • Top-Tier Compensation - Competitive salary + equity in a high-growth startup.

  • Comprehensive Benefits - Healthcare, dental, vision coverage.

  • Work With the Best - Join a world-class team of engineers and builders

Our Operating Principles


Extreme Ownership

We take full responsibility for our work, outcomes, and team success. No excuses, no blame-shifting — if something needs fixing, we own it and make it better. This means stepping up, even when it’s not “your job.” If a ball is dropped, we pick it up. If a customer is unhappy, we fix it. If a process is broken, we redesign it. We don’t wait for someone else to solve it — we lead with accountability and expect the same from those around us.

Craftsmanship

Putting care and intention into every task, striving for excellence, and taking deep ownership of the quality and outcome of your work. Craftsmanship means never settling for “just fine.” We sweat the details because details compound. Whether it’s a product feature, an internal doc, or a sales call — we treat it as a reflection of our standards. We aim to deliver jaw-dropping customer experiences by being curious, meticulous, and proud of what we build — even when nobody’s watching.

We are “majos”
Be friendly & have fun with your coworkers. Always be genuine & honest, but kind. “Majo” is our way of saying: be a good human. Be approachable, helpful, and warm. We’re building something ambitious, and it’s easier (and more fun) when we enjoy the ride together. We give feedback with kindness, challenge each other with respect, and celebrate wins together without ego.

Urgency with Focus
Create the highest impact in the shortest amount of time. Move fast, but in the right direction. We operate with speed because time is our most limited resource. But speed without focus is chaos. We prioritize ruthlessly, act decisively, and stay aligned. We aim for high leverage: the biggest results from the simplest, smartest actions. We’re running a high-speed marathon — not a sprint with no strategy.

Talent Density and Meritocracy
Hire only people who can raise the average; ‘exceptional performance is the passing grade.’ Ability trumps seniority. We believe the best teams are built on talent density — every hire should raise the bar. We reward contribution, not titles or tenure. We give ownership to those who earn it, and we all hold each other to a high standard. A-players want to work with other A-players — that’s how we win.

First-Principles Thinking
Strip a problem to physics-level facts, ignore industry dogma, rebuild the solution from scratch. We don’t copy-paste solutions. We go back to basics, ask why things are the way they are, and rebuild from the ground up if needed. This mindset pushes us to innovate, challenge stale assumptions, and move faster than incumbents. It’s how we build what others think is impossible.

The personal data provided in your application and during the selection process will be processed by Happyrobot, Inc., acting as Data Controller.

By sending us your CV, you consent to the processing of your personal data for the purpose of evaluating and selecting you as a candidate for the position. Your personal data will be treated confidentially and will only be used for the recruitment process of the selected job offer.

In relation to the period of conservation of your personal data, these will be eliminated after three months of inactivity in compliance with the GDPR and legislation on the protection of personal data.

If you wish to exercise your rights of access, rectification, deletion, portability or opposition in relation to your personal data, you can do so through security@happyrobot.ai subject to the GDPR.

For more information, visit https://www.happyrobot.ai/privacy-policy

By submitting your request, you confirm that you have read and understood this clause and that you agree to the processing of your personal data as described.

Similar Jobs

Nintendo - Contract - Lighting Artist I (NST)

Nintendo

Redmond, Washington, United States (Hybrid)
6 Months ago
Bootloader studio - Senior Unity XR Engineer

Bootloader studio

Ho Chi Minh City, Vietnam (On-Site)
2 Months ago
Rockstar Games - Animation R&D Programmer: Retargeting

Rockstar Games

New York, New York, United States (On-Site)
4 Months ago
limit break - Unity UI Engineer

limit break

(Remote)
4 Months ago
Riot Games - Senior Software Engineer - VALORANT, Gameplay

Riot Games

Sydney, New South Wales, Australia (On-Site)
6 Months ago
Epic Games - Machine Learning Engineer

Epic Games

London, England, United Kingdom (On-Site)
4 Months ago
Globalization Partners - Staff Mobile Engineer (AI)

Globalization Partners

India (Remote)
1 Month ago
Game freak - R&D Programmer: System [Junior Class]

Game freak

Chiyoda City, Tokyo, Japan (On-Site)
2 Months ago
Apple - MacOS Machine Learning Engineer

Apple

Seattle, Washington, United States (On-Site)
1 Month ago
Jane Street - Alternative Data Researcher, Equities

Jane Street

New York, United States (On-Site)
2 Months ago

Get notifed when new similar jobs are uploaded

Similar Skill Jobs

Penrose studios - Production Artist

Penrose studios

San Francisco, California, United States (On-Site)
3 Months ago
Unity - Staff Machine Learning Engineer

Unity

San Francisco, California, United States (On-Site)
1 Month ago
Nahc.io - Software Engineer (Low-Level Programming)

Nahc.io

Hong Kong (On-Site)
2 Months ago
Unity - Project Manager

Unity

Tel Aviv-Yafo, Tel Aviv District, Israel (On-Site)
1 Month ago
Unity - Senior Backend Engineer

Unity

Tel Aviv-Yafo, Tel Aviv District, Israel (On-Site)
2 Weeks ago
Motorola solutions - Hypercare Solution Analyst

Motorola solutions

Lisbon, Lisbon, Portugal (Hybrid)
1 Year ago
Colo pl - 3D Generalist

Colo pl

Minato City, Tokyo, Japan (On-Site)
1 Year ago
Epic Games - Automation Programmer

Epic Games

Montreal, Quebec, Canada (On-Site)
4 Months ago
Tesla - Cell Team, Test Equipment Engineering Internship

Tesla

Brandenburg, Germany (On-Site)
6 Months ago
Handy games - Narrative Game Designer

Handy games

Giebelstadt, Bavaria, Germany (On-Site)
4 Months ago

Get notifed when new similar jobs are uploaded

Jobs in San Francisco, California, United States

TFL Group - Director, Business Development

TFL Group

Overland Park, Kansas, United States (On-Site)
7 Months ago
DMG - Billing Operations Lead

DMG

Cincinnati, Ohio, United States (On-Site)
2 Weeks ago
Cadence - Data Quality Assurance Analyst

Cadence

Portland, Oregon, United States (On-Site)
3 Months ago
dun bradstreet - Attorney, Product Compliance

dun bradstreet

Jacksonville, Florida, United States (On-Site)
2 Months ago
Magic School - Director of Talent

Magic School

United States (Remote)
3 Weeks ago
Google - Staff Software Engineer, AI/ML Recommendations, Rankings, Predictions, YouTube

Google

Mountain View, California, United States (On-Site)
3 Months ago
quience - Recruiting Coordinator

quience

United States (Remote)
3 Months ago
frames store - FREELANCE: VFX PRODUCERS - CHICAGO

frames store

Chicago, Illinois, United States (On-Site)
1 Year ago
zoox - Manager, Embedded Pose and Sensors

zoox

Foster City, California, United States (Hybrid)
1 Month ago
Gloss Genius - Product Manager, Business Scalability

Gloss Genius

New York, United States (Hybrid)
1 Month ago

Get notifed when new similar jobs are uploaded

Research Development Jobs

zoox - Senior Machine Learning Engineer - Perception

zoox

Foster City, California, United States (Hybrid)
3 Months ago
Apple - ML Engineer - Generative AI, Siri Agent Modeling

Apple

Sunnyvale, California, United States (On-Site)
3 Months ago
Behaviour Interactive - Senior AI Programmer

Behaviour Interactive

Montreal, Quebec, Canada (Hybrid)
1 Month ago
Sully.ai - Software Engineer, Research Associate

Sully.ai

United States (Remote)
3 Weeks ago
Stylumia - Senior Machine Learning Engineer - Time Series & Computer Vision

Stylumia

Bengaluru, Karnataka, India (Hybrid)
11 Months ago
NVIDIA - Developer Technology Engineer - HPC and AI

NVIDIA

Taipei City, Taiwan (On-Site)
4 Months ago
Single Store - Head of Digital & AI Transformation

Single Store

United States (Remote)
1 Month ago
bytedance - Student Researcher (Doubao (Seed) - Foundation Model - Video Generative Model)

bytedance

San Jose, California, United States (On-Site)
4 Months ago
bytedance - Research Scientist in ML Systems

bytedance

Seattle, Washington, United States (On-Site)
9 Months ago
Globalization Partners - Principal AI Engineer

Globalization Partners

(Remote)
7 Months ago

Get notifed when new similar jobs are uploaded

About The Company

San Francisco, California, United States (On-Site)

San Francisco, California, United States (On-Site)

San Francisco, California, United States (Hybrid)

San Francisco, California, United States (On-Site)

San Francisco, California, United States (On-Site)

San Francisco, California, United States (On-Site)

San Francisco, California, United States (Hybrid)

Madrid, Community Of Madrid, Spain (Hybrid)

San Francisco, California, United States (On-Site)

San Francisco, California, United States (On-Site)

View All Jobs

Get notified when new jobs are added by HappyRobot

Level Up Your Career in Game Development!

Transform Your Passion into Profession with Our Comprehensive Courses for Aspiring Game Developers.

Job Common Plug