Backend Developer

ID 97258 NodeJS Data Migration "Customer location: USA Candidates locations: EU, all except Ukraine, Russia Language: English B2 Estimated start date: 31.08.2026 Duration: 6 months"

Ideally, someone based in the EU/Poland, as the client may visit our Polish office to meet the team, or the candidate should be willing to travel to Poland for business trips.

Project Responsibilities

Migrate legacy system data and document storage to Supabase. Execute identity consolidation algorithms (unite fragmented FMS and Approver accounts into unified users). Database & Core Architecture: Design the core Supabase/PostgreSQL database schema and Row-Level Security (RLS) policies. Set up the audit log storage engine required for Audit Defence records. Handoff: Establish the DB foundation and migration pipelines early so the Middle BE developer can build features on top of a clean architecture.

Candidate's Portrait

Data Migration & ETL and ETL expert specializing in legacy data extraction, account unification logic, and Supabase database architecture. PostgreSQL/Supabase exp ETL & Data Scripting Data Cleansing / Deduplication

Must-haves

A Backend Developer with 5+ years of experience in Node.js, Database Engineering, PostgreSQL, and complex data migrations Hands-on experience with Supabase infrastructure, Row-Level Security (RLS), and document storage integration. Proven track record of writing data deduplication and user-account unification algorithms. Expertise in setting up event-driven audit logging tables.

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