Senior Backend Developer (Node.js / NestJS / Express / Go) Bucharest

Senior Backend Developer (Node.js / NestJS / Express / Go)
Bucureşti
Bucharest, Romania

Senior Backend Developer (Node. js / Nest
JS / Express / Go)

Location: Remote or Dubai (Hybrid optional)

Type: Full-Time | Industry: E-commerce, E-learning, Fintech, AI

We’re looking for a Senior Backend Developer to join our
- growing engineering team and help scale our e-commerce and e-learning platforms, with opportunities to collaborate on AI-driven tools and fintech systems. This is a
- heavy role focused on Node. js, with a preference for candidates who have experience with Go (Golang) or are eager to learn it. You’ll work across distributed systems, payment processing, authentication flows, and contribute to
- performance services.  

What You’ll Be Doing
Backend Development & Architecture

• Design and maintain highly scalable services using Node. js (Nest
  JS, Express. js).
• Build and extend REST and Graph
  QL APIs with clean, modular, and testable code.
• Contribute to the architecture of new microservices written in Go, especially for critical system components.

E-commerce & Fintech Focus

• Build and integrate secure payment gateway systems, including retry logic and reconciliation flows.
• Implement authentication, authorization, token management, and data encryption across services.
• Ensure system security, scalability, and reliability in handling sensitive financial and customer data.

Event-Driven Systems & Infrastructure

• Leverage Rabbit
  MQ and NATS for
  - based communication and distributed workflows.
• Work with Redis for caching, pub/sub, and queuing use cases.
• Design and optimize Postgre
  SQL (RDS) schemas and queries for performance.

Collaboration & Dev
Ops

• Work closely with Dev
  Ops and Frontend teams on CI/CD pipelines, container orchestration (Docker, Kubernetes, Helm), and infrastructure as code (Terraform).
• Participate in architectural reviews, technical documentation, and peer code reviews.

Growth & Cross-Platform Opportunities

• Collaborate across our AI platforms, automated trading tools, and internal fintech systems.
• Influence product direction, especially in integrating intelligent systems into our
  - learning and
  - commerce stacks.

Must-Have Experience

• 5+ years in backend development, with 3+ years of Node. js (Express. js, Nest
  JS) experience.
• Solid understanding of Type
  Script, ES6+, and asynchronous programming patterns.
• Experience building secure REST and Graph
  QL APIs in production.
• Hands-on knowledge of Postgre
  SQL, Redis, and message queues (Rabbit
  MQ/NATS).
• Strong grasp of payment systems, web security, JWT/OAuth2, data encryption, and authentication flows.
• Familiarity with Docker, Kubernetes, and CI/CD (Git
  Lab or similar).

Nice to Have

• Experience or working knowledge of Go (Golang).
• Exposure to Next. js, React, or
  - stack applications.
• Experience with AI-driven platforms, e-learning systems, or financial technology.
• Knowledge of infrastructure-as-code, serverless architectures, or API observability.

Our Stack

• Languages & Frameworks: Node. js (Nest
  JS, Express. js), Type
  Script, Go (Golang)
• Frontend: React, Next
  JS
• Data & Messaging: Postgre
  SQL (RDS), Redis, Rabbit
  MQ, NATS
• APIs: REST, Graph
  QL
• Dev
  Ops: Docker, Kubernetes, Helm, Git
  Lab, Terraform
• Cloud: AWS/GCP

Why Join Us?

• Build scalable platforms that power
  - world e-commerce and e-learning solutions.
• Work with cutting-edge AI and fintech products in
  - functional teams.
• Gain ownership, solve complex challenges, and help shape architectural decisions.
• Join a highly skilled,
  - driven engineering team working across modern stacks and ecosystems.