---
title: "Senior JavaScript Software Engineer (Barcelona - Hybrid)"
company: "WIZELINE"
company_url: "https://www.remjobs.works/companies/wizeline"
url: "https://www.remjobs.works/job/wizeline-senior-javascript-software-engineer-barcelona-hybrid-49e90a57-01f4-466e-8300-7bd3ccf90017"
apply_url: "https://www.wizeline.ai/careers/job?gh_jid=4635298"
workplace: onsite
location: "Barcelona, Spain"
employment_type: unspecified
seniority: senior
role: software-engineering
region: europe
skills: ["aws", "javascript", "nodejs"]
date_posted: 2025-03-21T11:45:50.000Z
first_seen_by_remjobs: 2026-09-15T16:34:55.874Z
---

# Senior JavaScript Software Engineer (Barcelona - Hybrid)

**WIZELINE** · Barcelona, Spain

Apply: https://www.wizeline.ai/careers/job?gh_jid=4635298

## About WIZELINE

Wizeline accelerates your roadmap through nearshoring and expert AI advisory services, improving efficiency, speeding execution, and driving sustainable innovation.

## About the role

**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](https://www.instagram.com/wizelineglobal/).

---

Source: WIZELINE's own career page, read by RemJobs. Canonical HTML version: https://www.remjobs.works/job/wizeline-senior-javascript-software-engineer-barcelona-hybrid-49e90a57-01f4-466e-8300-7bd3ccf90017