Senior GenAI Software Engineer (North America)

Join Liftoff as a GenAI Software Engineer and shape the future of ad tech. This role sits within the Creative GenAI (CGenAI) team and is dedicated to advancing the strategic initiatives that define how Liftoff applies generative AI to creative. Reporting to the Senior Director Creative GenAI you'll build intelligent agents to optimize workflows and architect AI-powered solutions that transform how our business operates by leveraging cutting-edge vision and diffusion models to revolutionize creative production.

In this role you'll have an immediate impact on our AI strategy and product development. We foster a collaborative environment where you'll work closely with key decision makers to bring innovative solutions to life. You'll have the freedom to experiment mentor others and grow into a thought leader who defines not just Liftoff's AI future but influences the broader ad tech industry.

This role is ideal for an engineer who thrives in ambiguity has a passion for experimentation and wants to push the boundaries of what's possible with LLMs. You'll have the opportunity to tackle complex challenges validate new approaches and drive meaningful improvements across our organization.

WHAT YOU'LL DO

• Architect and ship AI systems that generate ad creatives end-to-end - including interactive playables - combining code generation multimodal asset generation and runtime quality into production-grade pipelines
• Rapidly prototype against real creative problems then take what works from proof-of-concept to production at speed
• Partner closely with creative strategists content leads and builders to translate craft expertise into systems that scale
• Design robust systems that handle the inherent variability of AI-generated output through thoughtful guardrails fallbacks and quality gates
• Build evaluation infrastructure tailored to creative output spanning subjective quality assessment human-in-the-loop review and A/B testing against real ad performance
• Drive innovation by researching new model capabilities and proposing new initiatives as the frontier moves
• Mentor the team and raise the bar on engineering practices fostering an environment of open feedback and shared learning.

WHO YOU ARE

• Minimum Bachelors Degree and 5yrs of relevant experience.
• Senior engineer with significant pre-LLM production experience and solid fundamentals in system design debugging and observability
• Strong in Python for AI/agent work and fluent in JavaScript/TypeScript for creative and playables work; HTML and gaming experience a plus
• Has shipped LLM-powered systems to production learned the failure modes firsthand and makes deliberate choices about what the model handles versus what belongs in code tools or context
• Treats evals as first-class infrastructure and brings hands-on production experience with multimodal AI specifically image and/or video generation models with battle-tested intuition for where they excel and where they break.
• Clear communicator who collaborates well across teams and disciplines navigating ambiguity and adapting as priorities shift
• Location: Eastern Standard Time Zone - (part of the team is located in London U.K.)

Location: 

Liftoff follows a philosophy of "remote first come together meaningfully" and allows employees to be based from a number of different states where we have entities within the United States (FL GA MA MI NJ NY PA).  The preferred location for this role is within Eastern Standard Time Zone.

Travel Expectations:

We offer several opportunities for in-person team gatherings including but not limited to project meetings regional meetups and company-wide events. We expect our employees to attend these gatherings at least once per quarter. These gatherings provide essential opportunities for collaboration communication and team building.

Compensation:

Liftoff offers all employees a full compensation package that includes equity and health/vision/dental benefits associated with your country of residence. Base compensation will vary based on the candidate's location and experience. 

• SF Bay Area/Los Angeles/Orange County/Seattle:  $180000 - $230000
• All  other U.S approved states: $165000 - $211000

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What We Do

Liftoff is a leading AI-powered performance marketing platform for the mobile app economy. Our end-to-end technology stack helps app marketers acquire and retain high-value users while enabling publishers to maximize revenue across programmatic and direct demand. Liftoff’s solutions including Accelerate Direct Monetize Intelligence and Vungle Exchange support over 6600 mobile businesses across 74 countries in sectors such as gaming social finance ecommerce and entertainment. Founded in 2012 and headquartered in Redwood City CA Liftoff has a diverse global presence. Come join the rocket ship! 🚀

Why Work With Us

Join Liftoff where innovation meets impact in a fast-changing global market. We’re a remote-first hybrid-optional company driven by our values—Growth Mindset Data-Driven Agency & Urgency and Togetherness. Our R&D and GTM teams solve complex technical challenges at scale while our G&A pros keep us moving fast and supported.

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