Software Engineer, Backend (5+ years of experience)

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. 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 Tec_h
• 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.

About the Role:

As a member of our Backend Team, you will play a critical role in building and evolving the systems, services, and APIs that supports our global user base. You’ll be involved in high-impact engineering projects—working on the cutting edge of advanced algorithms, distributed systems, video processing, and machine-learning pipelines. As a member of our software engineering team, you will have an opportunity to empower creators and businesses around the world tell their stories with audio, video, and beyond.

Key Responsibilities:

• Solve Complex Technical Challenges: You will design, implement, and optimize large-scale distributed systems capable of handling enormous throughput and concurrency.
• Drive Product Infrastructure Forward: You’ll collaborate closely with product teams to make sure our platform is not just operationally sound, but also enables rapid feature development and deployment across multiple surfaces (mobile, web, and beyond).
• Shape Next-Generation Video and AI Platforms: You’ll have visibility into our advanced video processing workflows and AI research efforts, contributing to the core building blocks that make these cutting-edge initiatives possible.
• Drive Platform Improvements: Continuously refine our existing platform, identify new technologies or methodologies that can enhance our infrastructure, and guide their adoption within the organization.
• Collaborate Across Teams: Partner with cross-functional teams (product, web, mobile, AI research) to bring new ideas and approaches to the table and stay ahead of industry trends.

Preferred Requirements:

• 5+ years of industry experience designing, building, and operating backend services in a production environment.
• Strong computer science fundamentals (data structures, algorithms, concurrency, etc.) and proficiency in modern programming languages (e.g., Python, C++, Java, Rust).
• Hands-on experience with cloud infrastructures (GCP, AWS, Azure, or others) and container orchestration (Kubernetes).
• Excellent problem-solving skills with a proven track record of delivering high-quality, scalable solutions.

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

Please note benefits apply to full time employees only.