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

The Vault; United States; Remote; USD 140,000 - 190,000; Full time

Benefits offered by this job

Fully remote

Competitive salary

Annual performance bonus

Paid time off

Multiple projects to explore

Job summary

The Vault is seeking a Senior Full-Stack Engineer to own features end-to-end across Go/Node.js backends and a React frontend. You will work on a security-first, API-driven platform for digital asset operations in a fully remote role.

Ideal candidates have 7+ years on production systems with Go and/or MERN, strong DDD, and solid database expertise in PostgreSQL and MongoDB, plus daily use of AI coding tools with rigorous verification.

Qualifications

• 7+ years building production systems with Go and/or the MERN stack.
• Strong backend fundamentals: concurrency, APIs, reliability.
• Hands-on with DDD (not just buzzwords): model domains with clean boundaries.
• Strong database skills across PostgreSQL and MongoDB: design, indexing, migrations.
• Experience with ORMs/ODMs (GORM/Mongoose) and raw SQL when needed.
• Frontend proficiency in React (TypeScript preferred).
• Good testing discipline (Go testing, Jest/Vitest).
• REQUIRED: daily use of AI coding tools with disciplined verification.

Responsibilities

• Build end-to-end product features across Go and Node.js/Express backends and React frontend
• AI-assisted development: use Cursor/Copilot/ClaudeCode daily to accelerate delivery while verifying outputs
• Design backend services using DDD patterns with clean layering and pragmatic architecture
• Implement data models and migrations across PostgreSQL and MongoDB using GORM/Mongoose or raw queries
• Build and maintain REST APIs and webhooks/event-driven workflows in Go and Node.js/Express
• Implement frontend flows in React (TypeScript) with dashboards and admin UI
• Ensure observability: structured logging, metrics, tracing, and production-ready error handling
• Contribute to security: RBAC, least-privilege, safe secrets handling, audit trails
• Own quality: unit/integration tests, contract tests, and CI pipelines

Skills

Go

MERN stack

React

Node.js

DDD modeling

PostgreSQL

MongoDB

AI coding tools

REST APIs

Tools

GORM

Mongoose

Docker

Kubernetes

Jest

GitHub Actions

Job description

The Vault by Tría Financeis 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

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

• 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’s the best fit for you.