The Vault by Tría Finance is a Swiss and EU-regulated fintech group delivering institutional-grade digital asset infrastructure and services. Bringing together a software vendor and a licensed Crypto Asset Service Provider (CASP), The Vault combines deep domain expertise with a strong foundation of transparency, security, and regulatory compliance. We develop and operate a comprehensive suite of crypto-native solutions, powered by proprietary technology, enabling institutions to execute digital asset strategies across both custodial and non-custodial models. We're building a security-first platform for digital asset operations. We're looking for a Senior Full-Stack Engineer who can own features end-to-end — from clean domain modeling in Go or Node.js to a polished, crisp React UI. Build end-to-end product features across Go and Node.js/Express backends and React frontend AI-assisted development: use Cursor/Copilot/ClaudeCode (or similar) daily to accelerate delivery, refactoring, and test generation—while verifying outputs and keeping code clean Design backend services using DDD patterns (bounded contexts, aggregates, domain events), clean layering, and pragmatic architecture Implement data models and migrations across PostgreSQL and MongoDB, using GORM, Mongoose, or raw queries where appropriate Build and maintain REST APIs (and webhooks/event-driven workflows where needed)



in both Go and Node.js/Express Implement frontend flows in React (TypeScript): dashboards, admin workflows, status lifecycles, audit views Own quality: unit/integration tests, contract tests, and CI pipelines 7+ years building production systems with Go and/or the MERN stack (MongoDB, Express, React, Node.js), plus solid React experience ~ Strong backend fundamentals: concurrency, APIs, reliability, debugging ~ Strong database skills across PostgreSQL and MongoDB: schema/collection design, indexing, query tuning, migrations ~ Experience with GORM and/or Mongoose (or similar ORMs/ODMs) plus comfort dropping to raw SQL or aggregation pipelines when needed ~ Frontend proficiency in React (TypeScript preferred), including state management and form-heavy admin UIs ~ Good testing discipline (Go testing, Jest/Vitest, integration tests; frontend testing basics) ~ REQUIRED: confident daily use of AI coding tools (Cursor/Copilot/etc.) Docker/Kubernetes familiarity CI/CD ownership (GitHub Actions/GitLab CI), release workflows Ownership mindset: deliver features end-to-end with high quality Annual performance bonus; Fully remote position — work from anywhere in the world (team operates on CET); Paid time off, including vacation, sick leave, and public holidays; Multiple projects within the company — the opportunity to discuss different projects during the interview and choose the one that's the best fit for you.

📌 Senior TypeScript Full-stack Engineer (Barcelona)
🏢 The Vault
📍 Barcelona