[Job - 30900] Master Data Developer (Amazon Neptune), Brazil

As CI&T grows its Data & Analytics Center of Excellence, we seek a talented and experienced Graph Database Developer to join a specialized team building an AI-powered fashion advisory platform for a leading client in the fashion and retail industry. This role is central to turning unstructured editorial content into a structured knowledge graph that powers real-time, intelligent style recommendations for end users attending formal events.

The Graph Database Developer will work in a staff augmentation model, integrating with a cross-functional team that includes a Machine Learning Developer and a GenAI Agent Developer. This is a hands-on technical position requiring strong ownership of the graph data layer — from schema design through ingestion, entity resolution, and query performance — with direct impact on what the AI agent recommends to users.

Responsibilities:

• Schema Design: Define node labels and edge types that represent the relationships between designers, garments, style attributes, trends, occasions, and editorial articles.

• Entity Ingestion: Build workflows that consume structured JSON payloads from the upstream data pipeline and load them into the graph database in batch mode.

• Probabilistic Entity Matching: Match extracted item mentions (for example, a bag described by type, color, and material) to the correct product node in a catalog of 50,000+ SKUs by scoring attribute overlap, assigning a match confidence, and creating the relationship only when it exceeds a defined threshold. Deduplicate items that appear inconsistently across different articles.

• Editorial Signal Weighting: Assign weights to relationships based on how prominently an item or trend was featured, distinguishing a dedicated feature from a passing mention. These weights determine what the AI agent surfaces first in its recommendations.

• Query Optimization: Design and tune openCypher traversal queries, including multi-hop queries, to return relevant results in under three seconds for downstream Amazon Bedrock Agents.

• Cross-Functional Collaboration: Work alongside the Machine Learning Developer and GenAI Agent Developer to align the graph structure with the retrieval and recommendation needs of the AI agent.

• Technical Validation: Support technical interviews and validation of new team members joining the graph database workstream, as needed.

Requirements:

• Advanced English proficiency (C1 or above), with autonomy to communicate directly with international stakeholders

• Solid experience with Amazon Neptune and the property graph data model

• Experience writing and optimizing openCypher queries, including multi-hop traversals under latency constraints

• Experience designing graph schemas, evaluating trade-offs between different modeling approaches

• Experience building entity resolution logic, including fuzzy matching, scoring algorithms, and deduplication across data sources

• Strong Python skills for data engineering, including batch processing of structured data payloads

• Ability to work independently in a fast-paced, staff augmentation setting with an established client team

Nice to Have:

• Prior experience in fashion, retail, or e-commerce catalogs

• AWS certification in databases or data analytics

• Experience integrating graph databases with generative AI agents (for example, Amazon Bedrock Agents)

• Familiarity with recommendation systems or ranking/weighting logic for content surfacing