Senior Fullstack Developer

(Remote | USD | Contractor)

Mandatory skills:

5+ years of experience as a Fullstack Developer

Strong experience with + TypeScript

Experience building Self-Hosted applications (not only CLI-based apps)

Solid experience developing REST APIs (custom auth, validation, structured logging)

Experience with external databases (Postgres / Supabase / Firebase / SQL / NoSQL)

Scalable backend architecture design

React experience (Admin UI / internal dashboards)

Experience using AI coding tools (Claude Code, Cursor or similar)

Fluent English (C1+)

Responsibilities:

Design and deploy fully self-hosted applications

Manage infrastructure (hosting, networking, security, environment configuration)

Build complex integrations with Wix and other marketplaces

Develop advanced business logic (additional fees, product-based rules, validation flows, file up...