Full-Stack Developer – JSON Schema Engineer (Remote)

About the role

We are seeking a contract Full‑Stack Developer to design and implement robust JSON schemas that will be used to validate and enrich training data for next‑generation AI models. The position is fully remote and offers the opportunity to work closely with API gateway teams and domain experts across finance, healthcare and engineering.

Key responsibilities

• Analyse complex PDF documents (25‑150 pages) to identify data fields for extraction.
• Design and build deeply nested JSON schemas from scratch, defining field types, naming conventions and hierarchical structures.
• Implement granular validation logic, including sum checks and null‑testing, to ensure data integrity.
• Collaborate with API gateway teams to create schema‑driven validation workflows for real‑time processing.
• Document schema specifications and maintain clear communication with cross‑functional teams.

Required profile

• Proven experience designing JSON schemas for complex data structures.
• Strong understanding of API gateway integration and data validation techniques.
• Familiarity with JWT for secure data exchange.
• Experience extracting structured data from PDF documents.
• Ability to work independently in a remote environment with clear documentation.

Required skills

• JSON schema design and validation
• API gateway integration
• JWT (JSON Web Token)
• PDF data extraction
• Data modeling