Junior Software Engineer (NodeJS/Java) — Remote & Flexible

Smadex; Barcelona; Hybrid; 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 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