Software Engineer, Full-Stack

Captions is the leading AI video company—our mission is to empower anyone, anywhere to tell their stories through video. Over 10 million creators and businesses have used Captions to simplify video creation with truly novel and groundbreaking AI capabilities.

We are a rapidly growing team of ambitious, experienced, and devoted engineers, researchers, designers, marketers, and operators based in NYC. As an early member of our team, you’ll have an opportunity to have an outsized impact on our products and our company's culture.

Our Technology

Mirage Announcement our proprietary omni-modal foundation model

Seeing Voices (technical paper) generating A-roll video from audio with Mirage

Mirage Studio for generating expressive videos at scale

"Captions: For Talking Videos” available in the iOS app store

Press Coverage

Lenny’s Podcast: Interview with Gaurav Misra (CEO)

Latest Fundraise: Series C Announcement

The Information: 50 Most Promising Startups

Fast Company: Next Big Things in Tech

Business Insider: 34 most promising AI startups

TIME: The Best Inventions of 2024

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, 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)

We do not work with third-party recruiting agencies, please do not contact us**

About the role

Our software engineers work across the stack to build consumer-facing products for millions of creators and businesses worldwide, and we’re currently hiring experienced full-stack engineers to join our web-platform team. Our product engineers push the limits of what’s possible in the browser—from custom graphics rendering to sophisticated video processing, and the integration of large video-generation models—tackling complex engineering and product challenges to enable creators to tell their stories with audio, video, and beyond.

Key Responsibilities

• Build user-centric products by leveraging modern frontend, backend, and API technologies, including advanced in-browser rendering (e.g., WebAssembly & WebGL).

• Implement full-stack solutions that balance performance, scalability, reliability, and extensibility. 

• Own the product development lifecycle alongside cross-functional teammates (product, design, infra, and ML) to shape features from early concepts through final release.

• Maintain a high bar for code quality by championing best practices, testing, and participating in thoughtful code reviews.

Preferred Qualifications

• 7+ years of professional software engineering experience

• Strong understanding of Computer Science fundamentals (algorithms and data structures).

• Proficiency in full-stack software development, including modern front-end technologies, back-end technologies, API frameworks, and cloud platforms. 

• Bonus points for experience with complex rendering or real-time media processing

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!

• Doordash DashPass subscription

• Health & Wellness Perks (Talkspace, Kindbody, One Medical subscription, HealthAdvocate, Teladoc)

• 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.