Senior Software Engineer — Real-Time Ad Serving

zetaglobal · Londonsenior

En corto

▸Ingeniero de software senior que desarrolla lógica de negocio en Lua para servir anuncios en tiempo real a escala.
▸Trabajas en un sistema que procesa 200K+ peticiones por segundo con latencias estrictas y impacto directo en anunciantes y editores.
▸Lo más destacado: el código que escribes se ejecuta en producción y maneja miles de millones de transacciones diarias.

Proficient English (the interview process will be held in English)

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¿Qué piden?

✓5+ años de experiencia en desarrollo backend
✓Entendimiento profundo de fundamentos de informática: estructuras de datos, algoritmos, optimización de rendimiento
✓Experiencia construyendo y operando sistemas distribuidos en producción
✓Capacidad de trabajar con código en producción y mantener calidad con pruebas automatizadas
✓Disposición para aprender Lua (se proporciona tiempo y apoyo)
✓Inglés fluido para entrevistas y trabajo diario

¿No cumplís todo? Es lo normal — tu dossier gratis te dice qué gaps tenés y cómo cubrirlos en la entrevista.

C++LuaOpenRTBMongoDBAWSGoRustJavaReal-time data processingAI-assisted development tools

¿A quién escribirle en zetaglobal?

Tu dossier gratis identifica a las personas que te entrevistarían — con su background, qué valoran y cómo escribirles para destacar antes de aplicar.

WHO WE ARE Zeta Global (NYSE: ZETA) is the AI-Powered Marketing Cloud that leverages advanced artificial intelligence (AI) and trillions of consumer signals to make it easier for marketers to acquire, grow, and retain customers more efficiently. Through the Zeta Marketing Platform (ZMP), our vision is to make sophisticated marketing simple by unifying identity, intelligence, and omnichannel activation into a single platform – powered by one of the industry’s largest proprietary databases and AI. Our enterprise customers across multiple verticals are empowered to personalize experiences with consumers at an individual level across every channel, delivering better results for marketing programs. Zeta was founded in 2007 by David A. Steinberg and John Sculley and is headquartered in New York City with offices around the world. To learn more, go to www.zetaglobal.com . THE ROLE As a Senior Software Engineer on the LiveIntent Real-Time Ad Serving team, you will design, develop, and own the business logic that powers programmatic advertising at scale — ad selection, targeting, frequency capping, budget pacing, and delivery optimization. The real-time platform is built on C++ and Lua: C++ provides the high-performance server framework, while Lua implements the business logic layer. You will work primarily in Lua, developing and evolving the features that directly serve LiveIntent's product — ensuring advertisers get the best outcomes and publishers maximize their revenue. While we're open to candidates with experience in any backend language, a willingness to work with Lua is essential — we provide time and the right environment to get up to speed. You will collaborate closely with Product, working on features that directly impact LiveIntent's customers — from ad targeting and delivery to reporting and optimization. This is a hands-on engineering role where your code runs in production handling billions of daily transactions. This is a hybrid/remote role based out of our Berlin, Germany or Prague, Czech Republic offices. ESSENTIAL RESPONSIBILITIES • Develop and optimize business logic in Lua for ad selection, targeting, frequency capping, and budget pacing • Design, build, and maintain real-time services processing 200K+ requests per second with strict latency requirements • Work closely with Product to deliver features that meet advertiser and publisher needs • Ensure code quality through code reviews, automated testing, and continuous integration • Participate in architecture discussions and influence the technical roadmap • Participate in on-call rotation to support production systems DESIRED CHARACTERISTICS • 5+ years of software engineering experience in backend development • Deep understanding of computer science fundamentals: data structures, algorithms, performance optimization • Experience building and operating distributed systems in production • Exposure to the full software development lifecycle — from design to production and monitoring • Strong commitment to code quality, automated testing, and documentation • Proficient English (the interview process will be held in English) • Experience with Lua or willingness to learn (we provide time and the right environment) • Experience in online advertising / ad tech (RTB, programmatic, DSP/SSP) is a plus • Proficiency in a systems-level language (C++, Go, Rust, or Java) is a plus • Experience with MongoDB and real-time data processing is a plus • Experience with cloud infrastructure (AWS) at scale is a plus • Experience with AI-assisted development tools and agentic workflows is a plus • Experience with OpenRTB protocol and ad exchange integ

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