Senior Software Developer

About Topsort

At Topsort, we believe in the mission of democratizing the secret technologies of the walled gardens and creating a privacy-first cookie-free world of clean advertising with modern tech, friendly products, and AI. We believe in making advertising intuitive, intelligent, and genuinely cool, without any of the creepy ads or cookie-obsession (well, maybe just the chocolate ones). In a rapidly changing industry, we're on a mission to democratize monetization access for all and ensure that advertising doesn't leave any brand or seller feeling confused or overwhelmed

Today, Topsort has 5 major hubs worldwide, and employees in 13+ countries, including Menlo Park, Boston, Santiago Chile, Sao Paulo Brazil, Barcelona Spain, and Sydney Australia. We are a truly global company that was born in the pandemic that’s had rapid growth since out of a genius product, a customer-first mentality, and a hardworking team of talented individuals. Since our founding in 2021, we’ve gained customers in retail, marketplaces, and delivery apps in 40+ countries and quickly approaching the #1 position in the industry.

Do you enjoy a fast-paced environment? Do you like seeing your work create real-time impact, being part of a rocket ship from the very beginning? Let’s do the unimaginable - let’s make ads clean and cool again, with AI and modern technology. 

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?

As a Senior Software Developer at Topsort you will build back-end services, APIs, and front-end experiences to support our mission: democratizing auction-based infrastructure for all marketplaces. Our first product is sponsored listings as a service. We automate and simplify auctions so that any advertiser, especially small ones, can compete successfully. It’s not easy. We use our game and auction theory expertise; implement real-time, scalable, always-available systems; and build an intuitive, easy-to-use UI for managing campaigns.

• Design, develop, and maintain scalable, high-performance applications while ensuring code quality and best practices.
• Provide mentorship, conduct code reviews, and drive best engineering practices to improve team efficiency.
• Identify and resolve bottlenecks, optimize system performance, and ensure reliability in distributed architectures.
• Work with cross-functional teams, translate business needs into technical solutions, and drive innovation through new technologies and best practices.

What (we think) you need to be successful - we’re open to not checking all the boxes and be proven wrong by outlier candidates as well!

• Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field.
• 5+ years of experience in backend engineering, designing, developing, and maintaining scalable services.
• Strong experience with microservices architecture and distributed systems, ensuring efficiency and reliability.
• Proven track record of implementing engineering best practices, improving development efficiency and maintaining high code quality.
• Proficiency in Python and TypeScript, with a solid understanding of best practices, patterns, and performance optimization.
• Expertise in high-performance, low-latency systems, designing solutions that scale efficiently.
• Deep knowledge of distributed systems, decoupling patterns, and modern software architecture to build robust and maintainable services.
• Strong problem-solving and collaboration skills, working closely with product and engineering teams to develop new features and optimize existing ones.
• Nice to have: Experience at top-tier technology companies such as Google, Meta, Amazon, or other high-scale engineering environments.

What We Value
At Topsort, we seek professionals who embody the following qualities to drive our mission forward:

• Deep dive into details: Professionals who are not content with superficial answers and dive deeply into the details to uncover root causes and optimal solutions.
• Team first: A low need for individual recognition, always prioritizing collective results over personal credit.
• You thrive with ambiguity: Exceptional ability to tackle open-ended problems in unstructured environments, turning chaos into structured innovation.
• Adaptability: Willingness to learn, mentor, lead, and follow as the situation demands, fostering growth at all levels.
• Urgency: A disproportionate sense of urgency in execution, while keeping scalability and the creation of replicable processes in mind to ensure long-term success.
• Curiosity: Genuinely curious individuals who can quickly learn difficult concepts and apply them effectively.