---
title: "Lead Fullstack Software Engineer (Javascript - Barcelona)"
company: "WIZELINE"
company_url: "https://www.remjobs.works/companies/wizeline"
url: "https://www.remjobs.works/job/wizeline-lead-fullstack-software-engineer-javascript-barcelona-b16e12ca-730e-4ea8-8ce0-2d01a6484114"
apply_url: "https://www.wizeline.ai/careers/job?gh_jid=8223578"
workplace: onsite
location: "Barcelona, Spain"
employment_type: unspecified
seniority: lead
role: software-engineering
region: europe
skills: ["aws", "graphql", "javascript", "nodejs", "postgres", "react"]
date_posted: 2026-09-22T16:01:27.000Z
first_seen_by_remjobs: 2026-09-22T16:07:20.148Z
---

# Lead Fullstack Software Engineer (Javascript - Barcelona)

**WIZELINE** · Barcelona, Spain

Apply: https://www.wizeline.ai/careers/job?gh_jid=8223578

## 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***

- Take full technical ownership of multiple products, including building new features, implementing technical improvements, and providing support to editorial teams.

- Design, develop, and maintain scalable web applications using JavaScript, React, and Node.js.

- Develop and maintain GraphQL APIs using Node.js, with NestJS experience as a plus.

- Design and optimize cloud-based applications and services using AWS.

- Work with PostgreSQL and other database technologies to build reliable and scalable data solutions.

- Lead and provide technical direction to a team of junior developers.

- Establish and enforce software engineering best practices, including coding standards, code reviews, Git, CI/CD, and automated testing.

- Continuously optimize application architecture, performance, scalability, maintainability, and reliability.

- Build and promote reusable components and solutions that can be leveraged across multiple products and teams.

- Collaborate with stakeholders and technical teams to communicate solutions, demonstrate work, identify risks, and drive projects forward.

- Work effectively in a fast-paced, agile environment while meeting critical project timelines.

- Provide technical guidance and independently drive solutions while seeking feedback when appropriate.

***Must-have Skills***

- 5+ years of experience architecting and building scalable web applications.

- Expert-level JavaScript skills with strong experience developing applications using React.

- Extensive experience building GraphQL APIs with Node.js.

- Strong experience with AWS, including:

S3

- EC2

- RDS

- API Gateway

- CloudFront

- Lambda

- In-depth knowledge of database technologies with hands-on experience using PostgreSQL.

- Real-world experience implementing and maintaining CI/CD pipelines using tools such as GitHub Actions or Jenkins.

- Strong understanding of software architecture, scalability, performance, and maintainability.

- Experience with software engineering best practices, including unit testing, code reviews, Git, documentation, and coding standards.

- Experience providing technical direction and mentoring junior developers.

- Strong communication and collaboration skills, with the ability to work effectively with technical and non-technical stakeholders.

- Ability to work independently, identify risks, and drive solutions in a fast-paced agile environment.

***Nice-to-have:***

- AI Tooling Proficiency: Leverage one or more AI tools to optimize and augment day-to-day work, including coding, drafting, analysis, research, or process automation. Provide recommendations on effective AI use and identify opportunities to streamline workflows.

- Experience with NestJS.

- Experience building reusable components, shared libraries, or platforms following an open-source mentality.

- Experience working in the media and publishing industry.

- Experience building tools or platforms used by editorial, content, or newsroom teams.

- Experience designing highly scalable and high-performance web applications.

- Strong understanding of cloud-native and distributed application architectures.

- Experience optimizing application performance, reliability, and maintainability.

- Experience working with multiple engineering teams and driving technical standards across teams.

**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-lead-fullstack-software-engineer-javascript-barcelona-b16e12ca-730e-4ea8-8ce0-2d01a6484114