Lead Fullstack Software Engineer (Javascript - Barcelona)

Posted 8 Days Ago
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Barcelona, Cataluña, ESP
In-Office
Senior level
Information Technology • Consulting
The Role
Lead development of scalable web applications and GraphQL APIs using JavaScript, React, Node.js, AWS, and PostgreSQL. Own product architecture, performance, reliability, CI/CD, testing, and engineering standards while mentoring junior developers. Collaborate with stakeholders, provide technical direction, build reusable solutions, and independently drive projects in an agile environment.
Summary Generated by Built In

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.




Skills Required

  • 5+ years of experience architecting and building scalable web applications
  • Expert-level JavaScript skills and strong React development experience
  • Extensive experience building GraphQL APIs with Node.js
  • Strong AWS experience, including S3, EC2, RDS, API Gateway, CloudFront, and Lambda
  • In-depth database knowledge with hands-on PostgreSQL experience
  • Experience implementing and maintaining CI/CD pipelines using GitHub Actions, Jenkins, or similar tools
  • Strong understanding of software architecture, scalability, performance, and maintainability
  • Experience with unit testing, code reviews, Git, documentation, and coding standards
  • Experience providing technical direction and mentoring junior developers
  • Strong communication and collaboration skills with technical and non-technical stakeholders
  • Ability to work independently, identify risks, and drive solutions in a fast-paced agile environment
  • AI tooling proficiency for coding, drafting, analysis, research, or process automation
  • Experience with NestJS
  • Experience building reusable components, shared libraries, or platforms with an open-source mentality
  • Experience in the media and publishing industry
  • Experience building tools or platforms for 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

Wizeline Compensation & Benefits Highlights

The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Wizeline and has not been reviewed or approved by Wizeline.

  • Healthcare Strength — Core coverage spans medical, dental, vision, life and disability insurance, with private medical commonly included in Mexico. Additional support such as EAP and wellness programs is also referenced.
  • Leave & Time Off Breadth — Paid vacation, holidays, sick leave, volunteer time, and parental leave are called out, alongside flexible or remote work options. Unlimited PTO is mentioned in some contexts.
  • Retirement Support — Savings and retirement elements appear across regions, including a 401(k) in the U.S. and a savings fund and profit sharing in Mexico. These components provide structured long-term financial benefits.

Wizeline Insights

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The Company
HQ: New York, NY
1,444 Employees
Year Founded: 2014

What We Do

Wizeline, a global technology services provider, builds the best digital products and platforms at scale. We focus on measurable outcomes, partnering with our customers to modernize core technologies, mature data-driven capabilities, and improve user experience.

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