Senior Full-Stack Engineer

November 6, 2026

Remote

Senior

Lisboa, Portugal

Indeed

Description

Swiss and EU-regulated fintech group delivering institutional-grade digital asset infrastructure and services. The product is API-driven, highly auditable and engineered for reliability, covering custodial and non-custodial models. The company is hiring a Senior Full-Stack Engineer who can own features end-to-end — from clean domain modeling in Go or Node.js to a polished 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 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 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

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: 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
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) with disciplined verification and secure practices
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)
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

Conditions

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
Full-time employment