Senior Full-Stack Engineer

THE VAULT; Województwo mazowieckie; Remoto; PLN 396.000 - 659.000; Tempo pieno

Vantaggi offerti da questo lavoro

Fully remote position

Annual performance bonus

Paid time off

Descrizione del lavoro

The Vault by Tría Finance is seeking a Senior Full-Stack Engineer to own features from domain modeling in Go or Node.js to a crisp React UI. You will build features end-to-end across back and frontend, apply AI-assisted development daily, and design robust backend services with DDD patterns.

Responsibilities include data modeling in PostgreSQL and MongoDB, REST APIs and admin UIs, while upholding security, observability, and test-driven development.

Competenze

• 7+ years building production systems with Go and/or the MERN stack.
• Strong React experience and modern frontend development.
• Hands-on with DDD and domain modeling to keep boundaries clean.
• Deep PostgreSQL and MongoDB knowledge: indexing, migrations, design.

Mansioni

• Build end-to-end features across Go/Node.js backends and React frontend.
• Apply AI-assisted development with verification to keep code clean.
• Design backend services using DDD, bounded contexts, and domain events.
• Implement data models/migrations in PostgreSQL and MongoDB.
• Develop REST APIs and webhooks; craft React dashboards and admin UIs.
• Ensure observability with logging, metrics, tracing and robust errors.
• Contribute to security: RBAC, least privilege, audit trails.
• Own quality: unit/integration tests, contract tests, CI pipelines.

Conoscenze

Go

MERN stack

React

API design

DDD

PostgreSQL

MongoDB

Testing

AI coding tools

Strumenti

GORM

Mongoose

Express

Docker

Kubernetes

GitHub Actions

Descrizione del lavoro

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 aSenior Full-Stack Engineerwho 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 that's the best fit for you.