Mid-Senior Software Engineer

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Smadex is an ad-tech company processing 4.5 million ad requests per second with real-time bidding systems. The role is for a mid-level Software Engineer to join an 8-person core engineering team responsible for maintaining and evolving the Open-RTB auction system. Responsibilities include feature design and implementation using NodeJS and Java, writing testable code, monitoring production systems, and collaborating in an agile environment. Requirements include a Bachelor's degree in Computer Science or related field, 2-4 years of software engineering experience, hands-on experience with Java or NodeJS, strong fundamentals in data structures and algorithms, proficiency with Linux, Git, Docker, Docker-Compose, testing tools, CI/CD frameworks, and excellent English communication skills. Bonus points for experience with key-value stores like Redis or Memcached and familiarity with AWS. The position is full-time, hybrid (2 days work from home), located in Barcelona, Spain. Benefits include a motivated team, competitive compensation, central office with amenities, flexible hours, meal vouchers, gym allowance, training opportunities, and team events. Visa sponsorship is not provided.