Research Engineer, Agentic Systems

Mirage is an AI video company focused on making creation dramatically easier. Our team tackles some of the hardest creative and technical challenges in generative media.

We get to rethink how people collaborate with AI that can actually do creative work with them—defining entirely new interaction paradigms for AI-native video tools. We make that possible by building multimodal agents that turn creative direction into edits, rendering engines that composite multiple layers of video and graphics, and generative video models trained from the ground up that create new media when needed.

All of this comes together in Captions, our creative workspace for generating, editing, and designing video. The technology behind Captions is now available more broadly: Tesseract gives any AI agent native video-editing capabilities, while developers can integrate our models into their own products through APIs.

• Explore our work
• Captions — Our flagship creative workspace
• Tesseract — Our professional video engine for AI agents
• Research — The foundation models we build in-house
• Updates — The latest from Mirage
• TechCrunch , Forbes , Fast Company — Press

Our Investors

We’re very fortunate to have some the best investors and entrepreneurs backing us, including Index Ventures, Kleiner Perkins, Sequoia Capital, Andreessen Horowitz, General Catalyst , Uncommon Projects, Kevin Systrom, Mike Krieger, Lenny Rachitsky, Antoine Martin, Julie Zhuo, Ben Rubin, Jaren Glover, SVAngel, 20VC, Ludlow Ventures, Chapter One, and more.

Please note that all of our roles will require you to be in-person at our NYC HQ (located in Union Square)

• About the Role
• Mirage is seeking an ML Engineer to push the boundaries of large language models for multimodal creative tasks. You'll develop new approaches for building and extending agentic systems that understand and operate over complex, real-world data, particularly video.

This role focuses on advancing agent capabilities, improving reasoning and control, and enabling new forms of interaction between language models and time-based media.

Responsibilities

Design and build end-to-end agentic systems for creative tasks

Develop novel approaches for training and adapting the large language models that power these agents

Design new objectives, datasets, and fine-tuning strategies to improve agent behavior and reliability

Explore multimodal reasoning and structured generation for creative control

Run systematic experiments to evaluate and improve agent performance in real-world tasks

Design evaluation frameworks for agentic workflows in video analysis and editing

Analyze failure modes across the full agent loop (planning, tool use, execution) and iterate on improvements

What makes you a great fit

BS/MS/PhD in CS, ML, or related field

Strong track record building production ML systems or agentic pipelines

Deep understanding of transformers and modern LLM techniques

Experience with fine-tuning, alignment, or post-training methods, especially for adapting models to generate structured outputs or drive tool use

Comfort owning the full stack, from model-level experiments to deployed agent systems

Strong experimental rigor and good taste for what makes agents actually work in practice

Benefits:

Comprehensive medical, dental, and vision plans

401K with employer match

Commuter Benefits

Catered lunch multiple days per week

Dinner stipend every night if you're working late and want a bite!

Grubhub subscription

Health & Wellness Perks

Multiple team offsites per year with team events every month

Generous PTO policy

Captions provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws.

Please note benefits apply to full time employees only.