Lead Fullstack Software Engineer (Javascript - Barcelona)

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 .