Software Engineer

We're quickly growing and super excited for you to join us!

About Topsort

Topsort is the leading Retail Media Infrastructure company - we're democratizing the auction-based ad technology that was once exclusive to Amazon, Google, and Alibaba, and making it accessible to retailers, marketplaces, and delivery apps in 40+ countries worldwide. Our APIs power native sponsored listings, dynamic banners, and clean-room attribution at scale — all privacy-first, all real-time.

We're a fast-growing, global-first team of ~100 people across Boston, Santiago, São Paulo, Barcelona, Sydney, and beyond. We move fast, we build in the open, and we hold a high bar — especially on infrastructure.

Why Topsort? Why now?

Topsort is changing the way Retail Media works. By joining our scaling team, you'll feel your impact from day 1. The processes and messaging you build today will be a critical part of our foundation as we accelerate toward 200 Topsorters worldwide, and your innovations will leave a lasting mark on the industry, as a whole. Retail Media is on the verge of a new era, and Topsort is gathering the ecosystem together to shape a brighter future. Joining us now, you'll work directly alongside our co-founders and founding members to bring on Retail Media 3.0. If you're looking to define your career as something greater than yourself, come scale with us.

What it’s like to work at Topsort

Our team is all about straightforward communication, embracing feedback without taking it personally, and fostering a super collaborative environment. It’s a sports team that’s hyper focused on winning, collaborative internally, and competitive externally - never the other way around. 

We thrive on working in the open, lifting each other up, and getting things done with a sense of urgency. We're the kind of team that loves making bold choices, sharing extraordinary opinions, and maintaining a 100 mph pace. No endless meetings here – if it can be done today, we're all about getting it done today.

What is this role like?

We're hiring a Software Engineer for our Infrastructure team — the backbone of everything Topsort runs on. This is not a supporting role. Infrastructure at Topsort is a first-class, mission-critical function. When our infrastructure is healthy, every retailer and marketplace our customers serve gets fast, reliable, and fair auction results. When it's not, we feel it everywhere.

You'll be building and owning the systems that power our real-time auction engine, API platform, and internal developer tooling — at a scale and reliability standard that leaves no room for sloppiness. We need someone who treats production like it matters, because it does.