Backend Engineer - AI Trainer

AfterQuery; Cincinnati (OH); On-site; USD 120,000 - 180,000; Full time

Job summary

AfterQuery seeks a Full Stack Engineer to build end-to-end applications across diverse domains. You will implement production-grade solutions with Next.js, Redis, and SQL databases, delivering robust features and scalable architectures.

You will own authentication, data flows, real-time updates, and reporting, ensuring high performance and reliability for AI training workloads. Join a team advancing data infrastructure and tooling for major clients.

Qualifications

• 5+ years of experience as a software engineer.
• Strong proficiency in Next.js with SSR and API routes.
• Experience with Redis caching and real-time data handling.

Responsibilities

• Design and develop complete, production-quality applications from scratch across diverse domains.
• Build dashboards, management systems, workflow tools, and data-driven platforms showcasing different patterns.
• Implement authentication, data management, real-time features, reporting, and complex business logic.

Skills

Next.js

Redis

SQL databases

Tailwind CSS

Full stack development

Education

Bachelor's degree in Computer Science or equivalent

Tools

PostgreSQL

MySQL

Job description

AfterQuery empowers 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 world's most complex data infrastructure to capture the 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.

We're seeking a Full Stack Engineer to build diverse, production-quality applications that will serve as training examples for AI models. You'll create complete, functional end-to-end applications across various domains and use cases - each application you build becomes part of our AI training dataset. Your work will involve developing a wide range of software solutions that demonstrate different architectural patterns, features, and implementations.

Responsibilities

• Design and develop complete, production-quality applications from scratch across various business domains and use cases using Next.js, Redis, and SQL databases
• Build diverse application types including dashboards, management systems, workflow tools, and data-driven platforms that demonstrate different feature sets and architectural patterns
• Implement comprehensive functionality in each application including user authentication, data management, real-time features, reporting, and complex business logic

Required Qualifications

• Strong proficiency in Next.js for building modern, performant frontend applications with server-side rendering and API routes
• Experience with Redis for caching, session management, and real-time data handling to optimize application performance
• Solid experience designing and working with SQL databases (PostgreSQL, MySQL, or similar) including schema design, queries, relationships, and optimization
• Ability to architect full stack applications that effectively leverage Next.js, Redis, and SQL databases together in production environments
• Experience implementing efficient data flows between frontend, caching layer, and database to ensure responsive user experiences Retry
• Experience with Tailwind CSS for rapidly building responsive, custom user interfaces with utility-first styling
• 5+ years of experience as a software engineer

About AfterQuery

AfterQuery is a research lab investigating the boundaries of artificial intelligence through novel datasets and experimentation. We believe great AI comes from exceptional, human-generated data.

We're backed by top investors, including Y Combinator and Box Group, and support all leading AI labs.