Smadex is a cutting-edge ad-tech company processing more than

4.5 million ad requests per second with response times under 100ms. While our real-time bidding systems handle the traffic,

our team builds the core platform that powers them

.

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. We are now evolving this ecosystem by integrating

Agentic AI to automate processes and maintain our competitive edge.

This is a full-time position (40 hours per week) with a hybrid working model based in Barcelona.

The Challenges You Will Tackle

- 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.

What We Are Looking For
- 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.

- Technical Literacy
- 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).

- Problem-solving DNA: You don't just wait for instructions; you investigate, ask "why," and propose solutions.

- Curiosity for AI You’ve experimented with (or are eager to master) LLMs and AI orchestration tools.

- Familiarity with Git flows and basic clean code principles.

- English Good reading and writing skills (technical documentation is in English).

- Bonus points

- Basic Linux skills and comfort working with a terminal.

- Experience with Angular or Node.js. Don't worry, you'll learn everything else you need!

- Experience with AWS (EC2, S3, WAF, Cloudfront, Elasticache, Route53, RDS, Bedrock…)

Don't check every box? Apply anyway. We are looking for potential, curiosity, and a growth mindset. If you don’t have experience with every tool in our stack but you are a quick learner and a great problem-solver, we want to hear from you. Your ability to adapt and grow is more important to us than your current toolkit.

Please note: We do NOT provide VISA sponsorship. Candidates without a legal permit to work in Spain will not be considered.

Our Tech Stack

- Main languages: Angular, NodeJS
- Databases: MySQL, Memcached
- Cloud & DevOps: AWS, Jenkins, Docker, Kubernetes
- Tools: Git, Jira, Notion
- Monitoring: Grafana, Kibana, AWS tools

What We Offer
- Join a highly motivated and talented team in a fun and friendly work environment
- Great compensation package
- Top location at the heart of Barcelona with a rooftop terrace, Barbeque, and a fully stocked fridge
- 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
- Meal vouchers - Ticket Restaurant monthly allowance
- Private Health Insurance
- Monthly gym allowance to use in up to 30 DIR gyms around the city
- Monthly TGIF events and regular team-building activities
- Ping-pong table and arcade machine
- And more!

If you want to know more about us visit our website Smadex.com

, and for a sneak peek of the cool stuff we build check this video out!

📌 Software Engineer (Platform Experience) (Barcelona)
🏢 Smadex
📍 Barcelona