# Full-Stack Engineer - Go + React (Crypto Custody)

**Company:** [The Vault](null/companies/25mHafoCpXxeM1fcGudL8p.md)
**Location:** Remote
**Workplace:** remote
**Employment type:** Full-time

[Apply for this job](null/view/719ad3c8-1e62-453c-b6e4-876f8ca3e715)

## Description

**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. Our product is API-driven, highly auditable, and engineered for reliability. 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.

**Responsibilities:**

-   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
-   Ensure correctness and observability: structured logging, metrics, tracing, and production-ready error handling
-   Contribute to security fundamentals: RBAC, least-privilege access, safe secrets handling, and audit trails
-   Own quality: unit/integration tests, contract tests, and CI pipelines

## Requirements

**Must-have**

-   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
-   Hands-on with DDD (not just buzzwords): can model domains and keep boundaries clean
-   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.) with disciplined verification and secure practices

**Nice to have**

-   Event-driven patterns: outbox, retries, idempotency, background jobs
-   Experience with RBAC/policy engines, audit logs, fintech/compliance workflows
-   Docker/Kubernetes familiarity
-   CI/CD ownership (GitHub Actions/GitLab CI), release workflows
-   Experience with high-security systems (custody, payments, identity)

**Soft skills**

-   Ownership mindset: deliver features end-to-end with high quality
-   Clear communication and ability to work across teams
-   Pragmatic: balances long-term design with shipping
-   Comfortable in ambiguity and fast iteration

## Benefits

-   Competitive salary;
-   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.