Yobi is a rapidly growing Behavioral AI company on a mission to ethically democratize the benefits of data and AI.

Since 2019, we have built one of the largest consented behavioral datasets in the United States, extending far beyond the walled gardens of Big Tech. Unlike traditional LLM companies, Yobi builds foundation models of human behavior grounded in real-world actions such as purchases and store visits.

Our private-by-design modeling enables state-of-the-art personalization and decisioning for leading brands and agencies while protecting privacy, safety, and ethics.

Today, we are focused on bringing the performance of closed-web user acquisition to the open web and connected TV, giving brands walled-garden results without the walls.

At our core, Yobi is building the behavioral intelligence layer for any system that makes a personalization decision.

Working at Yobi

We’re at an inflection point—customer adoption is accelerating, but there’s still room to shape the architecture and culture from the ground up. Engineers here own major surface areas, build 0→1 systems in large-scale data and model infrastructure, and help define how Behavioral AI scales ethically and effectively.

Highlights:

• Well-funded with 5+ years of runway. At the same time, we are scaling revenue quickly and project to be breakeven in 2026.

• Partnerships with Microsoft and Databricks

• Fully remote or hybrid from several hubs (SF Bay Area, Seattle, NYC)

• World-class team of Machine Learning experts who worked on cutting edge infra and recommender systems @ Amazon, Uber, Twitter, Meta, etc.

• Product and Go-To-Market teams who have taken ideas from concept to 9 figure revenue streams

Benefits:

• Competitive Base Salary

• Meaningful equity & financial upside - a real % of the company

• Annual bonus target based on personal and company performance

• Health, Dental, Vision - most plans will pay little to 0 out of pocket

• Unlimited PTO - we care about impact, not tracking days you’re out

• 401k with company match %

About The Role

As the Tech Lead / Senior Software Engineer for the Yobi Ad Platform, you’ll be responsible for leading the design and implementation of the systems that power our real-time ML-based advertising stack. This is a senior role where you will own a major product bet, mentor other engineers, and drive architectural direction—while still spending more than half of your time building.

You’ll work across low-latency decisioning, data pipelines, and service orchestration layers to make our platform reliable, scalable, and developer-friendly. The work spans real-time bidding systems, cloud-native infrastructure, and reproducible deployment tooling.

What it takes to succeed in this role:

• You have experience leading multi-person or even multi-team projects.

• You know when to empower/influence another person or team, and when to roll up your sleeves and implement it yourself

• Deep systems experience. You’ve built or scaled distributed, high-throughput, low-latency systems—ideally in advertising, recommendations, or another real-time domain.

• Strong with compiled languages. You’re fluent in one or more of Go, Rust, C++, Scala, or Java, and write code with clarity, correctness, and performance in mind.

• Architectural ownership. You can design clean interfaces, modular service boundaries, and deployment patterns that scale with product and team growth.

• Operational maturity. You understand observability, alerting, and reproducibility, and you treat CI/CD and infrastructure as first-class citizens.

• Mentorship and leadership. You lead by example, elevate those around you, and turn ambiguity into clarity and action.

• Startup mindset. You balance strong technical standards with pragmatism—you know when to ship and when to refactor.

We prioritize attitude, culture, and general (technical) fit over matching perfectly into one of our job descriptions. If our mission and work resonates with you, we encourage you to apply. Tell us how you can help drive our products forward, even if you don’t feel like you are a perfect fit for some of the listings.