Node.js

remote

We are seeking a Senior Node.js/React.js Engineer join our team and help drive the development of a complex, high-load payment processing platform for our U.S.-based client. The platform handles subscription management, real-time reporting, chargeback resolution, and integrates with popular platforms such as Shopify, WordPress, QuickBooks, and more.

Tech stack:

Node.js (Nest.js), React.js, SQL/NoSQL, AWS, Payment service integrations

Responsibilities:

Lead the design and implementation of backend services using Node.js (Nest.JS)
Develop advanced frontend features and UI components in React.js
Optimize database design and performance (PostgreSQL, NoSQL)
Ensure security best practices across authentication and authorization layers
Integrate with complex third-party APIs and payment systems
Work with AWS services (S3, Lambda, ECS, CloudWatch, etc.)
Implement and maintain CI/CD pipelines
Architect scalable background processing with RabbitMQ or similar tools
Write and maintain unit, integration, and E2E tests (Jest, Mocha, Cypress)
Manage API versioning and drive API design best practices
Set up application observability using Prometheus, ELK, OpenTelemetry
Mentor junior/mid developers and conduct code reviews
Take part in architecture decisions and planning sessions
Collaborate closely with cross-functional teams

Requirements:

5+ years of commercial experience with Node.js
3+ years of experience with React.js
Advanced knowledge of SQL/NoSQL databases and REST API development
Proven experience in building scalable, high-availability systems
In-depth understanding of AWS services and cloud-native architecture
Expertise in automated testing, CI/CD, and DevOps practices
Strong frontend development skills (React.js, state management, UI optimization)
Experience leading feature delivery and mentoring team members
Proficiency in written and spoken English (Upper-Intermediate or higher)
Excellent communication skills, including daily interaction with international clients
Proactive attitude and ownership mindset

Nice to have:

Background in fintech or payment processing platforms
Experience with event-driven architectures and microservices
Familiarity with additional languages (Python, Java, Go)
Exposure to regulatory and compliance topics (PCI DSS, GDPR)

If you're a Senior Node.js/React.js Developer passionate about building impactful products and mentoring others, apply now and join a team where your voice will influence both technical solutions and product direction.