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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Lead Fullstack Software Engineer (Javascript - Barcelona) - **Company:** Wizeline - **Location:** Barcelona, Spain - **Contract:** Permanent contract - **Skills:** JavaScript (Programming Language), Artificial Intelligence, Amazon Web Services, Amazon Cloudfront, Amazon Elastic Compute Cloud, Amazon S3, Applications Architecture, Application Performance Management, Automation of Tests, Unit Testing, Software as a Service, Cloud Engineering, Code Review, Databases, Continuous Integration, Github, PostgreSQL, Node.Js, Open Source Technology, Software Architecture, Software Construction, Web Application Frameworks, Web Performance Optimization, ReactJS, Software Application Programming, Git, Graphql, Api Gateway, NestJS, Software Coding, Data Pipelines, Jenkins - **Published:** September 22, 2026 - **Apply:** https://www.indeed.com/viewjob?jk=befcc4c8d8c200db ## About the Role * 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. ## Description * 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. ## Related Videos - [But, you're not Facebook](https://www.wearedevelopers.com/videos/378-but-you-re-not-facebook) - [Innovating Developer Tools with AI: Insights from GitHub Next](https://www.wearedevelopers.com/videos/1268-innovating-developer-tools-with-ai-insights-from-github-next) - [Nest.js - TypeScript in the backend can also be clean](https://www.wearedevelopers.com/videos/1033-nest-js-typescript-in-the-backend-can-also-be-clean) - [How a Small Team Shrank a Microsoft Monorepo by 94%](https://www.wearedevelopers.com/videos/1236-how-a-small-team-shrank-a-microsoft-monorepo-by-94) - [Bringing AI Model Testing and Prompt Management to Your Codebase with GitHub Models](https://www.wearedevelopers.com/videos/1536-bringing-ai-model-testing-and-prompt-management-to-your-codebase-with-github-models) - [Streaming AI Responses in Real-Time with SSE in Next.js & NestJS](https://www.wearedevelopers.com/videos/1630-streaming-ai-responses-in-real-time-with-sse-in-next-js-nestjs) ## Related Articles - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Dev Digest 131 - AI'm not sure about OSS](https://www.wearedevelopers.com/magazine/472-dev-digest-131-ai-m-not-sure-about-oss) - [Find a Developer Job: 12 Best Job Sites For Developers](https://www.wearedevelopers.com/magazine/165-find-a-developer-job-12-best-job-sites-for-developers) - [Dev Digest 132 - Binging WADFlix?](https://www.wearedevelopers.com/magazine/473-dev-digest-132-binging-wadflix)