ppSmadex is a cutting‑edge ad‑tech company: we process more than 4.5 million ad requests per second, replying under 100ms (for reference, the Google search engine handles ~76,000 QPS). Every day we generate several TBs of data that need to be processed, analyzed and aggregated, so our real‑time components get smarter every day. We need you to help us keep our platform in motion! If you are ready to boost your professional career in the tech world, this is your opportunity. /ph3The team /h3pYou 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. /ph3What are we looking for? /h3pWe'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. /ph3What will you do at Smadex? /h3pYou 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. /ph3Key Responsibilities /h3ulliFeature Ownership: Design, develop, and implement new features for core products using NodeJS and Java. /liliQuality Assurance: Write clean, efficient, testable code and thoroughly test work locally and in a sophisticated staging environment. /liliOperational Excellence: Monitor deployments and help ensure the stability,



reliability and performance of production systems. /liliAgile Collaboration: Collaborate with the team in an agile environment, participating in planning and reporting on progress. /li /ulh3Requirements /h3ulliA Bachelor's degree in Computer Science or a related technical field. /lili4 years of experience in a software engineering role. /liliHands‑on experience with Java or NodeJS. /liliA solid theoretical foundation in data structures, algorithms, and software design principles. /liliA genuine passion for technology and an eagerness to learn and grow professionally. /liliExcellent communication skills in English (written and spoken). /liliProficiency with Linux, Git, Docker, and Docker‑Compose. /liliExperience with testing tools and modern CI/CD frameworks. /li /ulh3What Will Make You Stand Out (Bonus Points) /h3ulliExperience with Key‑Value stores and in‑memory databases (e.g. Redis, Memcached). /liliFamiliarity with cloud environments, particularly AWS. /li /ulh3Our Tech Stack /h3ullibLanguages: /b Java, NodeJS, Bash, Python /lilibDatabases: /b MySQL /lilibCloud DevOps: /b AWS, Jenkins, Docker /lilibTools: /b Git, Jira, Notion /li /ulh3What We Offer /h3ulliIntegrate a highly motivated, young and dynamic team /liliGreat compensation package /liliTop location at the heart of Barcelona with a rooftop terrace, barbecue and a fully stocked fridge /liliGreat work‑life balance: work from home (2 days per week), versátil hours /liliMeal vouchers – Ticket Restaurant monthly allowance /liliMonthly gym allowance: choose between DiR and Wellhub /liliLinkedIn Learning and training opportunities /liliMonthly TGIF events /liliRegular team‑building events /liliFun and friendly work environment with talented marketers and engineers from over 40 countries /liliAnd more! /li /ulpPlease note that we do NOT provide VISA sponsorship. Candidates without a legal permit to work in Spain won't be considered. /p /p #J-18808-Ljbffr

📌 Senior Software Engineer (Backend) (Barcelona)
🏢 Smadex
📍 Barcelona