Founding Full Stack Engineer

About AfterQuery:

AfterQuery empower foundational AI labs, enterprises, and startups by providing high-quality human-generated datasets that are essential for fine-tuning more capable, refined, and reliable AI systems. We are on the forefront of creating the most complex data infrastructure to capture the most useful data for our major clients. We have raised our most recent round from BoxGroup, YC and a group of strategic angels that will push us to be at the forefront of the industry.

About the role:

As our first founding engineer, you’ll be critical in creating data infrastructure that will be shaping the future development of frontier models. You will be one of our first hires, and will get a lot of responsibility, owning entire projects end-to-end – meaning you can see your impact instantly.

What You’ll Do

• Build and scale complex data capturing workflows across web (Next.js) and desktop (Python)
• Architect and optimize data pipelines that experience high throughput, with heavy loads
• Collaborate with the founding team to define product strategy and ship features fast.
• Set engineering best practices and lay the groundwork for future team growth.

What We’re Looking For

• Proficiency in JavaScript (Next.js) and Python, with demonstrated experience building full-stack web applications.
• Experience building and deploying desktop applications that work seamlessly across Windows and macOS environments.
• Expert-level experience with Docker containerization, including container lifecycle management, networking, and custom image creation.
• Experience with serverless architecture and cloud functions for implementing heavy data processing
• Founder-Bound: You love building and go out of your way to get your ideas into production :)

Why Join?

• Massive Opportunity: We were one of the fastest growing YC companies in our batch, and we believe we can be one of the fastest growing YC companies of all time
• Founding role—you’ll define and own our data infrastructure from day one.
• Equity & Growth – Competitive salary + equity. As we scale, you’ll have the opportunity to lead and grow an engineering team.
• Strong Team: Founding team has experience from Citadel Securities, Meta, Google, Silver Lake, and Morgan Stanley – get to work with the best :)

The entire process has 4 steps and takes around 1.5 weeks in total:

• Initial 15-30 minute phone screening interview.
• One 30-45 minute technical interview.
• One week fully-paid work trial.
• Full-time offer.