Senior JavaScript Software Engineer

Wizeline

Senior JavaScript Software Engineer at Wizeline developing scalable backend solutions using Node.js and AWS. Collaborating with cross-functional teams to ensure performance and reliability in cloud-native applications.

Posted 7/14/2026full-timeBarcelona • 🇪🇸 SpainSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in designing and developing scalable backend services using Node.js and AWS technologies, including serverless architectures and event-driven systems. Strong problem-solving abilities and effective collaboration skills are essential for delivering high-performance applications.

Highest-signal resume keywords

Node.js Backend DevelopmentAWS Cloud ServicesEvent-Driven ArchitectureDynamoDB Data SolutionsRESTful API Development

ATS Keywords

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Hard Skills

Node.jsAWS LambdaAWS EC2AWS SQSAWS SNSDynamoDBAsynchronous ProgrammingDistributed Systems DesignBackend Application DevelopmentRESTful API

Soft Skills

Problem-SolvingDebuggingCommunicationCollaboration

Tech Stack

Tools & technologies

AWSCloudDistributed SystemsDynamoDBEC2JavaScriptNode.js

About the role

Key responsibilities & impact

Design, develop, and maintain scalable backend services using Node.js.
Build and optimize cloud-native applications on AWS.
Develop and maintain event-driven and messaging-based architectures using SQS and SNS.
Design and manage serverless solutions with AWS Lambda.
Work with DynamoDB to build high-performance, scalable data solutions.
Collaborate with cross-functional teams to deliver reliable, low-latency backend services.
Monitor, troubleshoot, and optimize system performance, availability, and scalability.
Participate in code reviews and contribute to engineering best practices.

Requirements

What you’ll need

+5 years of experience working as a Frontend Engineer.
Strong experience with Node.js and backend application development.
Hands-on experience with AWS, including: EC2, Lambda, SQS, SNS, DynamoDB.
Experience designing and developing scalable distributed systems.
Knowledge of asynchronous programming and event-driven architectures.
Experience building RESTful APIs and backend integrations.
Strong problem-solving and debugging skills.
Excellent communication and collaboration skills.

Benefits

Comp & perks

A High-Impact Environment
Commitment to Professional Development
Flexible and Collaborative Culture
Global Opportunities
Vibrant Community
Total Rewards