Smadex is a cutting-edge ad-tech company processing more than 4.5 million ad requests per second with response times under 100ms. We are responsible for the web ecosystem that ensures data integrity and campaign solidity. Without our platform, the real-time engines wouldn't have the high-quality data they need to perform. This is a full-time position (40 hours per week) with a hybrid working model based in Barcelona.
Agentic AI Integration: Help us implement AI agents and automation using LangChain and AWS Bedrock to keep our product at the cutting edge of the industry.
Solid Backend Foundations: While we use Angular, our heart is in the backend. You’ll be building scalable services with Node.js.
Cloud & Security: You will learn to manage and protect infrastructure using AWS WAF and CloudFront, ensuring our users' data is always safe.
End-to-end Ownership: You’ll be involved in the full lifecycle, from architectural discussions to deployment.
Bachelor’s degree in Computer Science, Engineering, or a related field, or equivalent experience (or last year studying).
You're available to work full-time (40 hours per week).
Experience in professional software development (ideally with Node.js or Angular).
The "Whole Picture" Mindset: You understand how a modern web application works end-to-end.



You know what happens between a user click and a database query.
If you lean Frontend: Deep knowledge of Angular/TypeScript and a solid grasp of how to interact with RESTful APIs efficiently.
If you lean Backend: Strong Node.js skills and a focus on scalability, security, and data integrity.
Regardless of your "side," you write clean, testable code and care about performance and security (AWS S3/WAF/CloudFront).
English: Good reading and writing skills (technical documentation is in English).
Basic Linux skills and comfort working with a terminal.
Experience with Angular or Node.js. Experience with AWS (EC2, S3, WAF, Cloudfront, Elasticache, Route53, RDS, Bedrock…)

We do NOT provide VISA sponsorship. Candidates without a legal permit to work in Spain will not be considered.
Angular, NodeJS
Databases: MySQL, Memcached
Cloud & DevOps: AWS, Jenkins, Docker, Kubernetes
Tools: Git, Jira, Notion
Monitoring: Grafana, Kibana, AWS tools
Great work-life balance: work from home (2 days per week) and versátil hours
Professional development with a LinkedIn Learning subscription and other training opportunities
Private Health Insurance
com, and for a sneak peek of the cool stuff we built check this video out!
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📌 Software Engineer Tech (Barcelona)
🏢 Smadex
📍 Barcelona