Junior Software Engineer

Smadex; Barcelona; On-site; EUR 45,000 - 75,000; Full time

Benefits offered by this job

Great compensation package

Central Barcelona location with roof-­

Work from home 2 days per week

Meal vouchers – Ticket Restaurant

Monthly gym allowance

LinkedIn Learning and training

Regular team-building events

Job summary

Smadex is seeking a knowledgeable Software Engineer to tackle complex technical challenges within our real-time bidding platform in Barcelona. You will deliver high-quality features, participate in code reviews, and shape architecture in a fast-paced, learning-oriented environment.

The role emphasizes collaboration, a "you build it, you run it" mindset, and continuous improvement. You will join a core engineering team responsible for the Open-RTB auction system, with 8 engineers and

Qualifications

• Bachelor's degree in Computer Science or related field.
• 2-4 years of software engineering experience.
• Hands-on experience with Java or NodeJS.
• Strong foundations in data structures, algorithms, and software design principles.
• Excellent English communication, written and spoken.
• Proficiency with Linux, Git, Docker, and Docker-Compose.
• Experience with testing tools and modern CI/CD frameworks.

Responsibilities

• Design, develop, and implement features for core products using NodeJS and Java.
• Write clean, efficient, testable code and thoroughly test work locally and in a sophisticated staging environment.
• Monitor deployments and help ensure the stability, reliability and performance of production systems.
• Collaborate with the team in an agile environment, participating in planning and reporting on progress.

Skills

Java

NodeJS

Linux

Git

Docker

CI/CD

English fluency

Education

Bachelor's degree in Computer Science

Tools

Jira

Docker-Compose

MySQL

AWS

Jenkins

Notion

Job description

Smadex is a performance advertising engine for mobile apps, enabling the world's leading marketers to grow across Mobile and Connected TV (CTV). Powered by AI models trained on real campaign outcomes, Smadex delivers profitable growth at scale. Headquartered in Barcelona, with teams across the Americas, EMEA, and APAC, Smadex is a business unit of Entravision (NYSE: EVC).

The team

You will join our core engineering team, a collaborative group of 8 experienced engineers responsible for maintaining and evolving the real-time bidding (Open-RTB) auction system that powers our entire business. We foster a fast-paced, supportive environment where knowledge sharing is key. We value autonomy and will provide the platform for you to grow your career while solving complex engineering challenges.

What are we looking for?

We're looking for a knowledgeable Software Engineer who is excited by complex technical challenges. Your success will be measured by your ability to deliver high-quality features, collaborate with the team, while sharing and applying your knowledge effectively.

What will you do at Smadex?

You will dive into a dynamic environment, tackling short-cycle tasks across the core platform following a "you build it, you run it" philosophy. You will be expected to participate in code reviews, contribute to technical and architectural decisions, and collaborate in a fast-paced environment where every opinion counts.

Key Responsibilities

• Feature Ownership: Design, develop, and implement new features for core products using NodeJS and Java.
• Quality Assurance: Write clean, efficient, testable code and thoroughly test work locally and in a sophisticated staging environment.
• Operational Excellence: Monitor deployments and help ensure the stability, reliability and performance of production systems.
• Agile Collaboration: Collaborate with the team in an agile environment, participating in planning and reporting on progress.

Requirements:

• A Bachelor's degree in Computer Science or a related technical field.
• 2-4 years of experience in a software engineering role.
• Hands-on experience with Java or NodeJS.
• A solid theoretical foundation in data structures, algorithms, and software design principles.
• A genuine passion for technology and an eagerness to learn and grow professionally.
• Excellent communication skills in English (written and spoken).
• Proficiency with Linux, Git, Docker, and Docker-Compose.
• Experience with testing tools and modern CI/CD frameworks.

What Will Make You Stand Out (Bonus Points):

• Experience with Key-Value stores and in-memory databases (e.g. Redis, Memcached).
• Familiarity with cloud environments, particularly AWS.

Our Tech Stack

• Languages: NodeJS, Java, Bash, Python
• Databases: MySQL
• Cloud & DevOps: AWS, Jenkins, Docker
• Tools: Git, Jira, Notion

What We Offer

• Integrate a highly motivated, young and dynamic team
• Great compensation package
• Top location at the heart of Barcelona with a rooftop terrace, Barbecue, and a fully stocked fridge
• Great work-life balance: work from home (2 days per week), flexible hours
• Meal vouchers - Ticket Restaurant monthly allowance
• Monthly gym allowance: Choose between DiR and Wellhub
• LinkedIn Learning and training opportunities
• Monthly TGIF events
• Regular team-building events
• Fun and friendly work environment with talented marketers and engineers from over 40 countries
• 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!

Please note that we do NOT provide VISA sponsorship. Candidates without a legal permit to work in Spain won't be considered.