About the Role

We are looking for a Senior Node.js Developer to join our team and help build a distributed, high-load real-time networking platform that processes, transforms, and routes large volumes of HTTP and WebSocket traffic between clients and external services.

This is a highly technical engineering role focused on network services, protocol-level development, observability, runtime integrations, and modern software architecture.

Our platform is built as a large TypeScript monorepository running simultaneously on both Node.js and Bun, with a unified abstraction layer. We actively embrace AI-assisted development practices and expect engineers to take ownership throughout the entire software lifecycle—from research and design to implementation, testing, deployment, and continuous improvement.

What You'll Do

Core Platform Development

Design, develop, and optimize services within our networking core.
Build highly reliable systems for request processing, routing, load balancing, failover, and streaming data delivery.
Contribute to platform scalability, performance, and operational excellence.

Network Protocol Engineering

Work directly with:

HTTP/1.1
HTTP/2
WebSocket
TLS
CONNECT tunneling
Compression technologies (gzip, brotli, zstd, deflate)

Diagnose and resolve complex networking issues in production environments.

Observability & Reliability

Implement tracing, metrics, and logging using OpenTelemetry.
Build dashboards and alerts generated directly from code.
Analyze system behavior under load and improve operational visibility.

Third-Party Integrations

Maintain and extend runtime integrations with external web applications.
Develop compatibility layers between internal systems and third-party clients.

Software Engineering Excellence

Write portable TypeScript code compatible with both Node.js and Bun runtimes.
Ensure proper tree-shaking, modular design, and absence of cyclic dependencies.
Participate in architecture discussions and technical decision-making.

Full Ownership Delivery

Own projects end-to-end:

Research
Design
Planning
Development
QA
Documentation
Retrospectives

Leverage AI tools as an integral part of the engineering workflow.

Requirements

5+ years of commercial experience with TypeScript and JavaScript.
Strong expertise in Node.js development.
Deep understanding of:

Asynchronous programming
Event loops
Streams
Error handling
High-performance backend systems

Experience designing and maintaining production-grade services.

Networking Knowledge

Practical understanding of:

HTTP/1.1 and HTTP/2
WebSocket
TLS
HTTP headers
Caching
Compression

Ability to troubleshoot real-world networking problems.

Software Architecture

Experience designing modular systems with:

Clean boundaries
Dependency Injection
Type-safe contracts
Maintainable code structures

Strong understanding of scalable application architecture.

Testing & Quality

Experience with:

Unit testing
Integration testing
End-to-end testing

Comfortable using TDD as a practical engineering tool.

Databases

Strong knowledge of SQL databases.
Experience with ORM frameworks and database migrations.
Understanding of indexes, transactions, and performance optimization.

DevOps & Observability

Experience with monitoring, logging, and tracing.
Familiarity with CI/CD pipelines and monorepo workflows.
Understanding of production environments and performance under load.

Highly Valued Experience

Reverse Engineering & Web Client Analysis

We highly value engineers who have experience working with third-party web applications and browser internals, including:

Reading and understanding minified or obfuscated JavaScript bundles.
Reverse engineering application behavior without source code.
Network traffic analysis using HAR files and proxy tools.
Debugging HTTP/2 and WebSocket traffic.
Browser instrumentation and runtime code injection.
Working with Service Workers and modern SPA architectures.
Cross-browser testing using Playwright and BrowserStack.

AI-Assisted Development

We actively build our engineering processes around AI-assisted development practices.

We are looking for engineers who:

Use AI critically and responsibly.
Verify generated code and recommendations.
Follow structured workflows from research to implementation.
Understand security considerations when working with AI tools.
Take ownership of outcomes rather than relying blindly on generated solutions.

Tech Stack

Core

TypeScript (strict mode)
Node.js
Bun

Monorepo & Tooling

pnpm Workspaces
Turborepo
BiomeJS

Networking

HTTP/1.1
HTTP/2
WebSocket
TLS
Circuit Breakers
Load Balancing

Backend

REST APIs
OpenAPI
RFC 9457 Problem Details

Data Layer

SQL
Drizzle ORM
Database Migrations
Hexagonal Architecture

Observability

OpenTelemetry
Prometheus
Grafana
SigNoz
VictoriaMetrics

Infrastructure

Docker
Kubernetes
Helm
GitLab CI

Frontend (Admin Panel)

React 19+
Ant Design
Vite
TanStack Query

Security

AES-256-GCM
HKDF
HMAC Signatures
JWT / RBAC
SSRF Protection
Rate Limiting

Testing

Vitest
Bun Test
Playwright

Benefits

20 vacation days and 5 family days yearly
Flexible start to the workday
Support from a professional corporate coach and psychologist
Regular internal and external activities, workshops, trips, and corporate events
Access to our internal knowledge base, meetups, and team-building activities
Ongoing training in new technologies and continuous professional development support

Senior NodeJS Developer