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Software Engineer, Agents

CaptionsUnion Square, New York CityEngineering
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Salary
$175K – $300K
Job type
Full-time
Experience
Senior · 5+ yrs
Posted
8 Oct 2026
Status
Open · checked 7d ago

About this role

Based in Union Square, New York City, the Software Engineer, Agents position at Captions involves building agentic systems for creative video workflows and suits engineers experienced in machine learning systems. This full-time role requires working in-person at the company headquarters.

Role Overview

Captions seeks a Software Engineer for its agents team to design and construct agentic systems that drive creative workflows for short-form video. The engineer operates across product, machine-learning, and systems engineering domains to manage problems end-to-end. Internal operations do not use hierarchical titles, though the organization currently targets candidates operating at a senior or staff-plus scope.

Key Responsibilities

Construct and deliver end-to-end agentic systems that enhance creative workflows while balancing performance, reliability, and quality.
Formulate agent architectures that handle context gathering, planning, tool selection, and execution of creative tasks at scale.
Incorporate advanced models by blending internal research and external capabilities for new agent functionalities.
Track and enhance agent quality in production settings through experimentation, evaluation frameworks, and real-world feedback.

Requirements

Minimum of five years of professional industry experience.
Demonstrated history of designing and building machine learning systems or agentic pipelines in production.
Extensive background in context engineering, including RAG systems, token optimization, and large-scale context management.
Background in constructing evaluation systems and agentic infrastructure encompassing multi-step planning and tool selection.
Strong problem-solving abilities paired with the capacity to learn quickly and deliver projects independently.

Nice to Have

Background working with multi-agent architectures.
Experience fine-tuning large language models for specific applications.
Familiarity with the direction of generative media and agentic artificial intelligence.
Experience as a startup founder or early-stage engineer.
Collaborative mindset and willingness to support team goals.

Skills and Tools

RAG systems
Token optimization
Machine learning systems
Agentic pipelines
Large language models

Salary and Benefits

Compensation ranges from $175K to $300K with equity offers.
Comprehensive medical, dental, and vision insurance plans.
401K plan featuring an employer match.
Commuter benefits and health and wellness perks.
Catered lunches multiple days per week and a nightly dinner stipend for late work.
Grubhub subscription.
Regular team offsites and monthly team events.
Generous paid time off policy.

About the Company

Captions operates as an artificial intelligence video company creating a workspace for generating, editing, and designing video. The organization builds multimodal agents, rendering engines, and generative video models. Backed by investors such as Index Ventures, Kleiner Perkins, Sequoia Capital, and Andreessen Horowitz, the company headquarters are located in Union Square, New York City.

How to Apply

Interested candidates should apply directly on the official company careers page.

Skills and tech stack

Questions candidates ask

Where is the job located?

The role is located in-person at the company headquarters in Union Square, New York City.

What is the salary and equity offering?

The salary ranges from $175K to $300K and includes offers for equity.

How many years of experience are required?

Candidates must have 5 or more years of professional industry experience.

What benefits are included for full-time employees?

Benefits include medical, dental, and vision plans, a 401K with employer match, commuter benefits, catered lunches, dinner stipends, a Grubhub subscription, wellness perks, monthly events, team offsites, and generous paid time off.

What specific technical background is necessary?

Applicants need a track record of developing machine learning systems or agentic pipelines in production, alongside deep experience in context engineering like RAG systems and token optimization.

Ready to apply?

The application is on the official Captions careers page.

Apply on company site