Senior Full-Stack Engineer

As a Senior Full-Stack Engineer at The Vault, you will own product features end-to-end, from clean domain modeling in Go or Node.js to a polished React UI. You join a Swiss and EU-regulated fintech group delivering institutional-grade digital asset infrastructure and services, combining a software vendor and a licensed Crypto Asset Service Provider (CASP) with deep domain expertise in transparency, security, and regulatory compliance.

What you'll do

• Build end-to-end product features across Go and Node.js/Express backends and React frontends
• Use AI-assisted development tools such as Cursor, Copilot, or ClaudeCode 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 as appropriate
• Build and maintain REST APIs, webhooks, and event-driven workflows in both Go and Node.js/Express
• Implement frontend flows in React with TypeScript: dashboards, admin workflows, status lifecycles, and audit views
• Ensure correctness and observability through 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 through unit tests, integration tests, contract tests, and CI pipelines

What you bring

• 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, and debugging
• Hands-on experience with DDD: you can model domains and keep boundaries clean
• Strong database skills across PostgreSQL and MongoDB: schema and collection design, indexing, query tuning, and 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 with TypeScript preferred, including state management and form-heavy admin UIs
• Good testing discipline: Go testing, Jest/Vitest, integration tests, and frontend testing basics
• Confident daily use of AI coding tools such as Cursor, Copilot, or similar, with disciplined verification and secure practices

Nice to have

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

What we offer

• Competitive salary
• Annual performance bonus
• Fully remote position: work from anywhere in the world, with the team operating on CET
• Paid time off including vacation, sick leave, and public holidays
• Multiple projects within the company: you can discuss different projects during the interview and choose the one that is the best fit for you

About The Vault

The Vault by Tría Finance is a Swiss and EU-regulated fintech group delivering institutional-grade digital asset infrastructure and services. It combines a software vendor and a licensed Crypto Asset Service Provider (CASP), offering a comprehensive suite of crypto-native solutions powered by proprietary technology for institutions executing digital asset strategies across custodial and non-custodial models.