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Amazon Flat File / Master File Specialist

Lago

  • We are seeking a detail-oriented Amazon Flat File / Master File Specialist to support catalog management and listing integrity across a 3,000+ ASIN portfolio.
  • Accuracy, speed, and strong technical understanding of Amazon’s catalog structure are critical for success in this role.

Responsibilities

  • Full flat file creation from scratch
  • Master file maintenance and updates
  • Variation theme configuration (size, color, style)
  • Bulk uploads via Seller Central
  • Build and maintain parent-child relationships
  • Troubleshoot orphaned child ASINs
  • Resolve broken variation families
  • Maintain clean SKU hierarchy
  • Create and manage Seller Support cases
  • Resolve listing suppressions and stranded issues
  • Troubleshoot upload errors and feed processing reports
  • Escalate catalog conflicts when necessary
  • Monitor listing health across 3,000+ ASINs
  • Identify and correct structural catalog issues
  • Support parent ASIN tracking initiatives
  • Maintain accurate backend listing data

Requirements

  • Must-Haves (Non-Negotiable): Hands-on experience with Amazon Seller Central (minimum 2 years)
  • Strong experience creating and troubleshooting flat files
  • Experience managing parent-child variation structures
  • Experience handling Amazon casework
  • Ability to work East Coast hours
  • Strong English communication skills (written and verbal)
  • Ability to work independently with minimal supervision
  • Highly detail-oriented and technically precise
  • Comfortable troubleshooting Amazon catalog issues daily
  • Execution-focused with minimal supervision required
  • Proactive in identifying listing structure problems
  • Organized and process-driven
  • Comfortable working in a high-volume Amazon environment

Preferred

  • Experience with Amazon Brand Registry
  • Experience managing high-variation apparel or footwear catalogs
  • Experience supporting 3,000+ ASIN portfolios
  • Familiarity with inventory forecasting or parent ASIN tracking systems
  • Experience using Asana or similar task management tools
  • Prior experience working with US-based Amazon sellers
  • Leadership or training experience

Pay

Salary Range: $8–$12 per hour (based on experience)

Benefits

  • Remote Work: Work from anywhere—our team is global, and we value work-life balance.
  • Growth Opportunities: As a key player you’ll have the chance to shape your role and grow with us.
  • Innovative Culture: Join a team that is passionate about leveraging data to solve challenges and drive success in a rapidly evolving market.

Amazon Flat File / Master File Specialist

Lago · Argentina (Remote) · Full-time · Posted 2026-11-04

Location: Remote

Schedule: East Coast Time Zone (9-5 Full-Time)

This role is focused on flat file creation, parent-child variation management, and Seller Central casework. The ideal candidate is execution-focused, highly detail-oriented, and comfortable working in a fast-moving Amazon environment where listings require constant monitoring and correction.

Ability to read and resolve flat file upload errors

_As part of our recruitment process, all candidates are kindly asked to read, understand, and agree to_ [_Lago’s Confidentiality and Non-Circumvention Agreement_](https://docs.google.com/document/d/e/2PACX-1vT9d3IW-QW-lGpt7ZIU22uqvADQUVESDzQPAopkpb1Tzf6OVERy198VBtGBpnpKXw/pub)_. This ensures a respectful and professional experience for everyone involved._

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[Apply at Lago](https://apply.workable.com/lago-1/j/66B593A55B/apply)