Senior JavaScript Software Engineer (Barcelona - Hybrid)
WIZELINE · Barcelona, Catalonia, Spain
IT Services and IT Consulting · 1,001-5,000 employees
About the role
Design, develop, and maintain scalable backend services and cloud-native applications using Node.js and AWS. Collaborate with cross-functional teams to optimize system performance, availability, and serverless architectures.
What they look for
Requirements
Requires over 5 years of experience as a software engineer with strong proficiency in Node.js and AWS services like Lambda and DynamoDB. Candidates should have expertise in designing scalable distributed systems and event-driven architectures.
Benefits
Full description
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:
Key Responsibilities
- 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.
