Senior Software Engineer, Backend (AdTech)

Mashgin•Palo Alto, CA

13d

About The Position

Mashgin powers the world's best checkout experience for over 40 million users. Customers just place their items on our kiosks and our AI rings up their entire order in less than a second. With Mashgin, lines are now optional. Mashgin's technology powers over 1 billion transactions at your favorite locations, including over half of all US professional sports teams, 4,000 convenience stores, major airports, universities, and more. We’re not just building cutting-edge AI—we’re creating real-world impact and unforgettable experiences. Backed by a well-funded Series B, we’re also one of the rare AI startups that’s already profitable. Our secret? A culture of extreme ownership, autonomy, and customer obsession. At Mashgin, we are building something extraordinary by challenging conventional wisdom. We’ve thrown out the old rules to focus on what truly matters: creating a kickass product that makes people say, 'Wow'. We don’t care about short-term wins; we build systems that stand the test of time. If you thrive in a culture of excellence without compromise and want to see your work have an immediate, remarkable impact, you’re in the right place. Position Summary We are seeking a Senior Backend Software Engineer with deep expertise in AdTech and advertising platform systems. You’ll work on the codebase that enables us to develop advanced deep learning solutions that power Mashgin's checkout experience for millions of transactions per month across the world. This role will have end-to-end ownership of projects, so you’ll be involved throughout the entire product lifecycle, from idea generation, design, and prototyping to execution, and shipping while contributing to many different parts of the codebase in multiple languages. We maintain a flat, high-impact engineering culture where every engineer who joins our team carries the title of Member of Technical Staff.

Requirements

5+ years of relevant coding experience
B.S. or higher in Computer Science (or equivalent work experience)
Excellent knowledge of one or more of these languages: Python, Node.js, C++, Go, C#, Java
Comfortable learning new languages, libraries, and frameworks when the solution calls for it
Experience building production-ready code that’s used regularly by lots of people

Nice To Haves

Experience building AdTech components (e.g., ad servers, RTB bidders, OpenRTB protocols, SSP/DSP integrations, tracking engines, or predictive click-through-rate services).
Experience in a fast-paced work environment, shipping quality code quickly and iterating
Comfortable with deploying and managing cloud infrastructure
Good knowledge of algorithms and data structures
Strong proficiency with SQL and other database technologies

Responsibilities

Owning major feature development and working directly with the founders on product development from end to end
Working with a small interdisciplinary team in hardware, software and design to build new versions of products from scratch
Working on building new features and dreaming up new architecture to solve challenging problems
Building backend infrastructure to perform scalable training in the cloud
Rethinking and recreating existing codebases for scale
Continuously improving and maintaining code that’s already in production