Company DescriptionWe're looking for a Senior/Principal Back-end Engineer (Go) to join a cross-functional R&D team building cutting-edge security solutions for the AdTech ecosystem.In this role, you will be responsible for building innovative, scalable, and cost-effective solutions within the AdTech ecosystem. Your work will focus on analyzing, detecting, and preventing various forms of fraudulent and irregular activity, helping reduce sophisticated Invalid Traffic (IVT) in programmatic advertising. You'll explore new methods to uncover fraud and identify patterns of abuse, ensuring digital advertising reaches real users.If you're passionate about solving complex issues, thrive in dynamic environments, and are excited to bring your ideas to life — we'd love to have you on the teamCUSTOMEROur client provides comprehensive security solutions that protect individuals, organizations, and communities, with a strong emphasis on the digital space. Their products are tailored to the needs of AdTech companies, focusing on bot protection and anti-malvertising. They support seamless onboarding and integration for partners, including SSPs, DSPs, agencies, and publishers. In addition, the company provides adaptable protection tools for various use cases, along with customizable reporting consoles and API integrations that fit smoothly into clients' existing platforms.PROJECTYou'll join a cross-functional R&D team focused on solving complex challenges faced by platforms and brands in delivering secure and effective advertising. The team values creativity, innovation, and ownership, and will give you the opportunity to bring your ideas to life.Job DescriptionDevelop and deliver software handling 1.5 trillion prediction requests daily for major internet companiesProfile, debug, optimize, and harden Linux-based softwareCollaborate with platform engineers to extend and reuse common platform componentsWork with detection researchers (data scientists, malware reversers, threat analysts) to design and propose new methods to demonstrate ROI for Customers because of using our softwareParticipate in Agile development, write documentation, give talks, and mentor team membersWork with talented engineers to innovate and push technology limitsFoster a culture focused on lean principles, deep work, and collaborationCollaborate with product managers to build and prioritize the product backlogDevelop, test, review, and release software across multiple repositoriesQualificationsProven expertise in Go or strong proficiency in system-level languages such as C++, Rust, or JavaSolid foundation in computer science principles (algorithms, data structures, etc.)Strong understanding of systems where different parts are spread across multiple machines or locations, and the ability to handle the common issues that come with managing these systemsHands-on experience across the full software development lifecycleDetail-oriented with a focus on correctness, performance, and a robust code review (merge request) processAbility to design and deliver stable, maintainable, and scalable architecture following best practicesProactive in identifying issues and aligning development efforts with business needsUpper-Intermediate level of EnglishWOULD BE A PLUSExperience with containers and orchestration platforms (Kubernetes, Docker)Familiarity with PythonBackground in building high-load systemsKnowledge of security and cryptographyExperience in software architecture and system designPrevious experience in the AdTech industryWillingness to work with SDKs and libraries that are responsible for collecting signals from different environments. This largely requires familiarity with JavaScript for the web payloads, Swift for the iOS SDKs and/or Java for the Android SDKsExperience with AWS, Azure, or GCP (Terraform)#J-18808-Ljbffr