As a Software Engineer at CharacterQuilt, you'll build AI marketing tools, maintain a TypeScript and React app, and collaborate on design.
CharacterQuilt is building a full-service AI marketing team. We have built one of the most proprietary datasets on earth when it comes to figuring out “what companies care about”, and we sell this data to sales and marketing teams at some of the fastest-moving companies on Earth. Your job is to help us turn this data into actionable interfaces for our customers.
Most startups talk about hiring for "slope over y-intercept". At CharacterQuilt, we pride ourselves on valuing momentum over everything. We believe your growth rate (the slope) isn't constant: you can increase it, and it's our job to convince you that this is the best place to do it.
What you'll do here: (ordered by the amount of time you’ll likely spend)
- Build tools for AI agents using external APIs, LLMs, and custom infrastructure
- Build & maintain the CharacterQuilt application a TypeScript + React app that is the daily driver of our end users and internal team
- Collaborate with our design engineer to ensure a fast, polished, and consistent experience across the entire application (Tailwind + shadcn/ui).
Qualifications:
- B.S. Computer Science or equivalent degree, undergraduate or higher
- Experience with tool use in LLMs [1] [2] and built real products using it
- Experience with Python (FastAPI, LLM APIs)
- Experience with ReactJS
- Experience with Typescript / Javascript
- Bonus: Experience with browser or testing frameworks (Selenium, Playwright)
Top Skills
Fastapi
JavaScript
Llm Apis
Playwright
Python
React
Selenium
Typescript
Similar Jobs
Blockchain • Fintech • Mobile • Payments • Software • Financial Services
As a Software Engineer on Cash App's Controls team, you'll develop scalable solutions for trust and safety infrastructure, collaborating across teams and leveraging AI tools.
Top Skills:
Ai-Driven Development Tools (Claude CodeAnthropic'S Model Context Protocol)AWSCursorDatadogDynamoDBGithub CopilotGooseGrpcHTTPJavaJSONKafkaKotlinKubernetesMySQLPrometheusProtocol Buffers
Blockchain • eCommerce • Fintech • Payments • Software • Financial Services • Cryptocurrency
The Software Engineer will develop platform infrastructure for Cash App, focusing on scalable solutions and AI-driven tools, while collaborating cross-functionally to ensure customer trust and safety.
Top Skills:
AWSDatadogDynamoDBGrpcHTTPJavaJSONKafkaKotlinKubernetesMySQLPrometheusProtocol Buffers
Artificial Intelligence • Big Data • Healthtech • Information Technology • Machine Learning • Software • Analytics
As a Senior Software Engineer, design and develop scalable applications for data management in healthcare, utilizing cloud technologies and CI/CD practices while solving complex technical challenges.
Top Skills:
AWSAzureGCPJavaPythonRestSQL
What you need to know about the Colorado Tech Scene
With a business-friendly climate and research universities like CU Boulder and Colorado State, Colorado has made a name for itself as a startup ecosystem. The state boasts a skilled workforce and high quality of life thanks to its affordable housing, vibrant cultural scene and unparalleled opportunities for outdoor recreation. Colorado is also home to the National Renewable Energy Laboratory, helping cement its status as a hub for renewable energy innovation.
Key Facts About Colorado Tech
- Number of Tech Workers: 260,000; 8.5% of overall workforce (2024 CompTIA survey)
- Major Tech Employers: Lockheed Martin, Century Link, Comcast, BAE Systems, Level 3
- Key Industries: Software, artificial intelligence, aerospace, e-commerce, fintech, healthtech
- Funding Landscape: $4.9 billion in VC funding in 2024 (Pitchbook)
- Notable Investors: Access Venture Partners, Ridgeline Ventures, Techstars, Blackhorn Ventures
- Research Centers and Universities: Colorado School of Mines, University of Colorado Boulder, University of Denver, Colorado State University, Mesa Laboratory, Space Science Institute, National Center for Atmospheric Research, National Renewable Energy Laboratory, Gottlieb Institute



