Senior Full-Stack Engineer (React + Go / MERN)

Tria Finance is a fintech startup building a high-load SaaS platform for institutional crypto asset management. Seeking a Senior Full-Stack Engineer with crypto experience to lead feature development end-to-end, from Go/Node.js backend to React interfaces. 100% remote, B2B, paid in EUR/USD/crypto.

Tria Finance is a fintech startup at the intersection of blockchain and traditional finance, creating a high-load SaaS platform for storing and managing institutional clients' crypto assets. Responsibilities: - Develop product features end-to-end: Go + Node.js/Express + React - Design backend services using DDD, Clean Architecture, bounded contexts, aggregates, and domain events - Work with PostgreSQL and MongoDB: schemas, indexing, query optimization, migrations - Develop REST APIs, webhooks, and event-driven workflows - Create complex React interfaces: dashboards, admin panels, forms, status workflows, audit views - Ensure production-ready code: testing, logging, metrics, tracing, and error handling - Use AI tools (Cursor / GitHub Copilot / Claude Code and similar) daily for development, refactoring, and test generation, with mandatory result verification

- 5+ years of commercial development of production systems - Strong backend in Go and experience with Node.js / Express - Confident React + TypeScript - Practical experience with DDD, not just knowledge of terminology - Good understanding of concurrency, API design, reliability, and debugging - Strong experience with PostgreSQL and MongoDB - Experience with GORM, Mongoose, or similar ORM/ODM - Ability to work with raw SQL and aggregation pipelines when necessary - Testing experience: Go testing, Jest/Vitest, integration tests - Practical experience with Web3 / crypto - Mandatory: confident daily use of AI tools for code development with careful result verification and adherence to safe engineering practices

- 100% remote - Cooperation format: B2B - Payment in EUR / USD / cryptocurrency - Ownership of key parts of a high-load fintech system - Work at the intersection of FinTech + Web3 + institutional crypto