Full-Stack Engineer (React + Go/MERN)

About us
We build 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 crisp React UI.

What you’ll do
● 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 experience
● 5+ 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