Senior Node.js Developer

Nearshore Portugal; Lisboa; Presencial; EUR 55 000 - 75 000; Tempo integral

Resumo da oferta

Nearshore Portugal is seeking a Senior Node.js Developer to design, build, and maintain scalable backend services. You will work on high-traffic APIs, improve performance, and contribute to architectural decisions.

Candidates should explain Node.js internals, race conditions, and be adept at debugging and observability; experience with Docker and distributed systems is a plus.

Qualificações

• Proven experience building production Node.js backends.
• Strong knowledge of scalable API architecture.
• Experience with performance optimization and troubleshooting.
• Solid understanding of asynchronous programming and event-driven systems.
• Experience with SQL and/or NoSQL database design and optimization.
• Experience with Docker and containerized deployments.
• Knowledge of monitoring, logging, and observability practices.
• Understanding of distributed systems concepts.
• Ability to explain Node.js internals (Event Loop, Worker Threads, Child Processes).
• Experience handling race conditions, duplicate requests, and idempotency.

Responsabilidades

• Design, develop, and maintain scalable backend services using Node.js.
• Build and optimize APIs capable of handling high traffic.
• Investigate and resolve production performance issues.
• Contribute to architectural decisions and technical planning.
• Ensure backend systems are reliable, observable, and maintainable.
• Collaborate with teams to improve system performance and scalability.
• Mentor junior developers and support technical growth within the team.
• Implement preventive measures after production incidents.

Conhecimentos

Node.js backend

API architecture

Performance optimization

Asynchronous programming

SQL/NoSQL design

Docker

Observability

Distributed systems

Node.js internals

Debugging

Ferramentas

Docker

Descrição da oferta de emprego

Senior Node.js Developer

Description

We are looking for a Senior Node.js Developer with strong hands-on experience building, scaling, and maintaining production backend systems.

This role requires more than theoretical knowledge: we are looking for someone who can demonstrate senior-level expertise in Node.js, API architecture, performance troubleshooting, distributed systems, and technical decision-making.

Requirements

• Proven experience with Node.js backend development in production environments
• Strong knowledge of scalable API architecture
• Experience with performance optimization and troubleshooting
• Solid understanding of asynchronous programming and event-driven systems
• Experience with SQL and/or NoSQL database design and optimization
• Experience with Docker and containerized deployments
• Knowledge of monitoring, logging, and observability practices
• Understanding of distributed systems concepts
• Ability to explain Node.js internals, including the Event Loop, Worker Threads, and Child Processes
• Experience handling race conditions, duplicate requests, and idempotency
• Strong debugging and root cause analysis skills

Responsibilities

• Design, develop, and maintain scalable backend services using Node.js
• Build and optimize APIs capable of handling high traffic volumes
• Investigate and resolve production performance issues
• Contribute to architectural decisions and technical planning
• Ensure backend systems are reliable, observable, and maintainable
• Collaborate with teams to improve system performance and scalability
• Mentor junior developers and support technical growth within the team
• Implement preventive measures after production incidents

Nice to have

• Experience designing systems handling millions of API requests per day
• Experience with microservice architectures and monolithic-to-microservice trade-offs
• Strong background in production incident management
• Previous experience in technical leadership or mentoring roles
• Experience working with high-availability or distributed systems

Working conditions

• Senior-level backend development role
• Focus on production-grade Node.js systems
• Opportunity to contribute to architecture and technical decisions
• Work with scalable APIs, distributed systems, monitoring, and performance optimization
• Collaboration with a technical team that values ownership, structured problem-solving, and high-quality engineering