Senior JavaScript Software Engineer (Barcelona - Hybrid)

We are:
Wizeline, a global AI-native technology solutions provider, develops cutting-edge, AI-powered digital products and platforms. We partner with clients to leverage data and AI, accelerating market entry and driving business transformation. As a global community of innovators, we foster a culture of growth, collaboration, and impact. With the right people and the right ideas, there’s no limit to what we can achieve

Are you a fit?
Sounds awesome, right? Now, let’s make sure you’re a good fit for the role:

• 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.

Must-have Skills  

• +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.

Nice-to-have:

• AI Tooling Proficiency: Leverage one or more AI tools to optimize and augment day-to-day work, including drafting, analysis, research, or process automation. Provide recommendations on effective AI use and identify opportunities to streamline workflows.
• Experience building systems that process millions of messages per day with high reliability.
• Experience designing and optimizing low-latency distributed systems.
• Knowledge of graceful degradation strategies to ensure service resilience under failure conditions.
• Experience with high-availability, fault-tolerant, and cloud-native architectures.
• Familiarity with performance optimization and scalability best practices.

Experience developing projects using frameworks. What we offer:

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

*Specific benefits are determined by the employment type and location.

Find out more about our culture here .