Senior Backend JavaScript Developer

R&D & Technical Senior Backend JavaScript Developer =======================================

US, REMOTE (On-site) #### Description

We’re looking for exceptional and experienced Backend JavaScript Developers to join our Network team. This team builds and operates core backend services that power Bright Data’s networking infrastructure - high-performance, highly reliable systems with deep focus on networking, security, and scale.

In this role, you will take end-to-end ownership of services and features in production, working on challenging problems around network traffic, protocols, performance, and reliability.

Tech Stack

Node.js, JavaScript, MongoDB, Redis, Kubernetes, AWS

#### Responsibilities

• End-to-end feature development, from design and implementation to production rollout and ongoing improvements.
• Build and maintain high-scale backend services with strong emphasis on performance, reliability, and security.
• Participate in system design and architecture planning to ensure scalable and maintainable solutions.
• Work on networking-related challenges such as traffic flows, proxy behavior, request/response handling, and protocol-level edge cases.
• Investigate and troubleshoot complex networking issues using tools such as Wireshark (and similar packet inspection/debugging tools).
• Write high-quality, maintainable code with appropriate test coverage; participate actively in code reviews.
• Collaborate closely with engineers and stakeholders to deliver impactful solutions.
• Continuously learn and apply best practices in backend engineering and networking.

#### Requirements

• 5+ years of hands-on software engineering experience, including 2+ years focused on backend JavaScript / Node.js development.
• Very good understanding of how the Node.js event loop works, including practical knowledge of the platform’s strengths and limitations (I/O vs CPU-bound workloads, async patterns, blocking...