Senior Backend Engineer

About the role

We are looking for a Senior Backend Engineer to architect and build the core systems of a next-generation advertising platform that embeds products directly into visual experiences. You will design high-throughput, low-latency services for campaign delivery, targeting, attribution, and partner integrations using Python, Django, Kubernetes, and AWS. This is an early-stage initiative where senior engineers define the technical direction and system architecture from the ground up.

What you will do

• Architect, build, and evolve core systems for the Ads platform;
• Design APIs and services supporting campaign management, targeting, delivery, attribution, and reporting;
• Build and optimize high-throughput, low-latency systems processing large volumes of events and data;
• Own critical systems end-to-end, including design, implementation, deployment, monitoring, and ongoing improvements;
• Drive architectural decisions and establish patterns that support scalability, reliability, and developer productivity;
• Collaborate closely with product, data, and partner teams to translate business requirements into robust technical solutions;
• Provide technical leadership through design reviews, system discussions, and mentoring other engineers;
• Contribute to engineering best practices, documentation, and long-term platform vision;
• Participate in hiring and help grow a strong, high-performing team.

Must haves

• 5 years of software development experience building scalable systems using backend programming languages/frameworks (e.g. Java, .NET, Python, Node.js, etc);
• Deep understanding of computer science fundamentals, including algorithms, data structures, networking, and databases;
• Proven experience designing and scaling distributed systems with a focus on performance, observability, and fault tolerance;
• Strong architectural instincts and the ability to make high-leverage technical decisions that impact multiple teams and systems;
• Demonstrated ability to influence and mentor senior engineers, guide teams through ambiguity, and elevate engineering practices across the board;
• Exceptional ownership mindset;
• Availability to work till 1pm EST (till 8 pm Kyiv time);
• Excellent communication and cross-functional collaboration skills;
• Comfortable operating in a fast-paced, high-autonomy, product-driven environment;
• Experience with e-commerce and catalog management is preferred;
• Familiarity with Python, Django, Kubernetes, PostgreSQL, and AWS is strongly preferred, but deep expertise in analogous systems and a willingness to learn are welcome;
• Upper-intermediate English level.

Nice to haves

• Strong experience with complex ETL flows and high-throughput systems is highly preferred;
• Experience with AdTech (This may include experience with DSPs, SSPs, ad exchanges, affiliate programs, Prebid.js, Prebid Server, Google Ad Manager, Amazon UAM/TAM, OpenRTB, identity and addressability solutions, as well as ad operations workflows.)