Full-Stack Engineer (React + Go/MERN)

Position: Full-Stack Engineer (React + Go/MERN) Location: Remote/Hybrid (overlap with UTC+2/3) Team: Frontend, QA, Product, Security, DevOps/SRE Domain: Fintech / custody platform (APIs, workflows, auditability)

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