Senior JavaScript Software Engineer (Barcelona - Hybrid)

Barcelona, Spain·Posted 3/21/2025

javascriptnodenode.jsaws

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 <ul> <li data-start="29" data-end="105">Design, develop, and maintain scalable backend services using Node.js.</li> <li data-start="106" data-end="164">Build and optimize cloud-native applications on AWS.</li> <li data-start="165" data-end="261">Develop and maintain event-driven and messaging-based architectures using SQS and SNS.</li> <li data-start="262" data-end="323">Design and manage serverless solutions with AWS Lambda.</li> <li data-start="324" data-end="400">Work with DynamoDB to build high-performance, scalable data solutions.</li> <li data-start="401" data-end="493">Collaborate with cross-functional teams to deliver reliable, low-latency backend services.</li> <li data-start="494" data-end="582">Monitor, troubleshoot, and optimize system performance, availability, and scalability.</li> <li data-start="583" data-end="658">Participate in code reviews and contribute to engineering best practices.</li> </ul> Must-have Skills  <ul> <li data-start="73" data-end="129">+5 years of experience working as a Frontend Engineer.</li> <li>Strong experience with Node.js and backend application development.</li> <li data-start="764" data-end="858">Hands-on experience with AWS, including: <ul data-start="813" data-end="858"> <li data-start="813" data-end="818">EC2</li> <li data-start="821" data-end="829">Lambda</li> <li data-start="832" data-end="837">SQS</li> <li data-start="840" data-end="845">SNS</li> <li data-start="848" data-end="858">DynamoDB</li> </ul> </li> <li data-start="859" data-end="926">Experience designing and developing scalable distributed systems.</li> <li data-start="927" data-end="998">Knowledge of asynchronous programming and event-driven architectures.</li> <li data-start="999" data-end="1059">Experience building RESTful APIs and backend integrations.</li> <li data-start="1060" data-end="1106">Strong problem-solving and debugging skills.</li> <li data-start="1107" data-end="1158">Excellent communication and collaboration skills.</li> </ul> Nice-to-have: <ul> <li>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.</li> <li>Experience building systems that process millions of messages per day with high reliability.</li> <li>Experience designing and optimizing low-latency distributed systems.</li> <li>Knowledge of graceful degradation strategies to ensure service resilience under failure conditions.</li> <li>Experience with high-availability, fault-tolerant, and cloud-native architectures.</li> <li>Familiarity with performance optimization and scalability best practices.</li> </ul> Experience developing projects using frameworks.What we offer: <ul> <li>A High-Impact Environment</li> <li>Commitment to Professional Development</li> <li>Flexible and Collaborative Culture</li> <li>Global Opportunities</li> <li>Vibrant Community</li> <li>Total Rewards</li> </ul> *Specific benefits are determined by the employment type and location. Find out more about our culture <a href="https://www.instagram.com/wizelineglobal/">here</a>.

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