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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 Estudiantes avanzados/as o graduados/as en Ingeniería en Sistemas, Computación, Electrónica o Informática / Licenciatura en computación. (Excluyente) 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 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 Esta posición es híbrida en Parque Chas (Excluyente)