Backend Engineer

Job Title

Backend Engineer (JSON Schema Developer)

Job Type

Contract (Full-time or Part-time)

Location

Remote

Job Summary

In this role, you'll apply your expertise to help train next-generation AI systems. Your work will shape how models learn, reason, and perform through high-quality, real-world input. No prior experience in AI is required — your domain knowledge is what matters.

Key Responsibilities

• Review and analyze complex PDF documents (25-150 pages) to identify and model key data points.
• Design comprehensive JSON extraction schemas from scratch, determining optimal field extraction, data types, and logical structuring—including deep nesting and repetition patterns.
• Embed field-level validation logic, such as sum requirements and null-testing, directly within JSON schemas.
• Define and articulate API contracts, ensuring seamless integration and data flow across systems.
• Collaborate with cross-functional stakeholders to clarify data requirements and refine schema design decisions.
• Document field definitions, required vs. optional status, and provide clear descriptions to ensure understandability and maintainability.
• Champion best practices in data architecture, driving consistency, scalability, and reusability in schema development.

Required Skills and Qualifications

• Proven experience in data modeling, database design, and schema development (ideally using JSON Schema).
• Advanced proficiency in designing deeply nested JSON structures from blank pages.
• Strong architectural thinking with the ability to analyze unstructured documents and translate them into well-organized information models.
• Expertise in embedding validation, field typing, and logical expressions within JSON schemas.
• Deep understanding of required vs. optional fields, type selection, and field-level documentation best practices.
• Exceptional written and verbal communication skills, able to clearly articulate complex technical decisions.
• Track record of working independently in a distributed, remote environment.

Preferred Qualifications

• Experience designing API contracts and collaborating on integration projects.
• Background in extracting and structuring data from highly variable or unstructured documents.
• Familiarity with data architecture and scalable information modeling in fast-paced environments.