Required Experienced Full Stack EngineerAs a Fullstack Engineer on the Demand R&D team in our Tel Aviv office, youll play a vital role in building our flagship recommendation products, from the backend services that decide which recommendations to serve to the ad formats and widgets that render them on publisher pages for billions of users.Youll build features end-to-end across the stack, develop innovative ad formats and high-scale backend services, and use big data and performance metrics to make engineering decisions that impact users, publishers, advertisers, and business performance.How youll make an impact:Build features end-to-end: design and develop backend services alongside the client-side code that consumes them, and own them through testing, deployment, monitoring and maintenanceWork on our recommendations ad formats serving and user experience - the backbone of the companys products, standing at the intersection of end-users, publishers and advertisersDevelop and maintain a variety of new & innovative ad formats that reach billions of users and are used by thousands of advertisers (carousel, app install, video ads and many more)Develop high-scale backend services that serve billions of requests a day, with real emphasis on performance, resilience and observabilityMake professional decisions based on big data and performance metrics of billions of users, while putting emphasis on business & page performance KPIsBuild AI agents, skills and workflows that multiply the teams capabilities - automated code reviews, data analysis, production anomaly investigation, feature validation and debuggingCollaborate with the Product, Data and UX teams throughout the company to iterate on the design and implementation of our productOur tech stackAI: Claude Code, Codex, CursorBackend: Java, Spring, Kafka, MySQL, Cassandra, BigQuery, Kubernetes, Docker, GrafanaFrontend: JavaScript, TypeScript, React, HTML, CSS, Jest, Playwright.Requirements: To thrive in this role, youll need:3 years of hands-on programming experience in fullstack developmentHands-on AI - you use AI coding tools (Claude Code, Codex, Cursor) as part of your daily development workflowSolid server-side development experience - Java or equivalent object-oriented language is a strong advantageGood understanding of vanilla JavaScript, CSS and HTML; React / TypeScript knowledge is an advantageExperience working with databasesTeam player, able to work in a fast-paced, dynamic environment and an independent learnerBSc in Computer Science or equivalentBonus points if you have:Good understanding of web fundamentals: HTTP methods & headers, CDN & DNS, how HTTP servers workExperience building high-scale or distributed backend systems (message queues, caching, concurrency)Experience with cross-browser and multi-device support - both responsiveness and feature supportExperience building AI agents, custom skills or automated workflows on top of AI coding toolsFamiliarity with advanced low-level JavaScript/web concepts such as Event Loop, Performance API, XHR/JSONP, browser paint cycleFamiliarity with any of the following: Web Components, Lighthouse, Maven, Docker, Kubernetes, BigQuery, MySQL, GrafanaFamiliarity with methodologies such as Agile, CI/CD, DevOps, TDD, SCRUMThis position is open to all candidates.
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