We are looking for a Software Engineer II/III (Backend Focus) to join our client’s Social Engineering team, responsible for designing, building, and scaling high\-load backend systems that process billions of transactions per day. This is a direct\-hire role within a global engineering organization of 900\+ people, collaborating with teams in the US, Israel, and the UK. You will work on end\-to\-end development, modern architectures, microservices, cloud environments, and large\-scale performance challenges. The Social team works primarily with Python and its modern ecosystem, building mission\-critical systems across Innovid’s global ad\-tech platform. **Responsibilities:** * Design and develop critical backend services, infrastructure components, APIs, and core modules. * Build and maintain microservices on AWS, ensuring scalability, resiliency, and high availability. * Develop systems capable of supporting billions of daily transactions in distributed environments. * Ensure production readiness, including performance, observability, stability, and incident ownership. * Lead software design efforts and contribute to architectural decisions. * Participate in end\-to\-end development: design, coding, testing, deployment, and monitoring. * Collaborate closely with Product, Engineering Managers, and cross\-functional R\&D teams. * Influence engineering standards, best practices, and overall technical excellence. * Mentor teammates and contribute to a developer\-centric culture of quality and ownership. **Requirements:** **Education \& Language:** * Advanced student or graduate in Computer Science, Software Engineering, or related fields (mandatory). * Advanced English — fluent communication with global teams (mandatory). **Technical Experience:** * 2\+ years of software development experience for level II, or 4–5\+ years for level III. * Experience building SaaS, cloud\-based products. * Strong experience with microservices and distributed architectures. * Hands\-on experience with Linux/Mac terminal in production environments. * Strong command of Git and modern development workflows. * Experience with at least one modern backend language: Python, Java, Scala, Kotlin, PHP, JavaScript/Node.js, or React. * Excellent analytical skills and ability to solve complex engineering problems. * Strong communication skills in multidisciplinary teams. **Nice to Have:** * Experience with Flask, FastAPI, Celery, SQLAlchemy, or Boto3\. * Experience with AWS, Docker, Kubernetes. * Background in full\-stack development with React. * Open\-source contributions. **Tech Stack:** **Backend:** Python, Flask, FastAPI, Celery **Infra:** AWS, Docker, Kubernetes **ORM / DB:** SQLAlchemy, Boto3, relational databases **Frontend (optional):** React **Methodology:** CI/CD, developer\-centric workflows, continuous deployment **Company Industry:** AdTech / Video / Connected TV (CTV) Innovid enables global brands to create, deliver, measure, and optimize interactive and dynamic video experiences across CTV, mobile apps, web, and social platforms. **Benefits:** * Salary: ARS 3\.500\.000 – 4\.200\.000 brutos (mensual) * Monthly Inflation updates (according to PC) * Lunch Credit * OSDE 410 as medical assurance * English lessons * Gym coverage (SportClub 90% discount) * Internet coverage (\+35k) * 1 extra paid month for primary \& secondary birthing caregivers * Learning \& Development \- Tools and Training * Hybrid \& flexible working model \- nice offices in CABA with endless snacks \& beverages * High visibility roles with a tremendous amount of growth potential * Global team and cross\-company collaboration, unlike anywhere else