NodeJS Developer

Inscribirse en esta oferta 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 DoCore 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., + 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 StackCore

• 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 Inscribirse en esta oferta

• 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 ExperienceReverse 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.

HBX Group Home Based - Mallorca - Civitfun Senior Full Stack Developer (Node.js, React) knowmad mood 28001 Madrid, Madrid provincia Backend Developer (Node.js/TypeScript) dentsu Madrid - Avenida del General Peron 40 Backend Developer (Node.js/TypeScript) Omega CRM En remoto Volver a la última búsqueda Trabajos ) Trabajos en ingeniería ) Senior NodeJS Developer ( volver a la última búsqueda Recibir ofertas similares por correo electrónico No gracias, llévame a la oferta de empleo Al crear una alerta, aceptas nuestros Términos y condiciones y Política de privacidad, y el uso de cookies. Inscribirse en esta oferta

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