Senior Software Engineer (Ad Tech Focus)

Checkmate is hiring a Senior Software Engineer to build the core systems behind mate, its AI growth product. The role owns backend services, ad tech infrastructure, tracking and conversion integrations, system reliability, and engineering practices.

Responsibilities:

• Design, build, and ship backend services and APIs that power mate's agents, from spec to production
• Improve and maintain an identity graph
• Own features end to end, partnering with product and design on what to build and how
• Write clean, well-tested, production-grade code and set the standard for the rest of the team
• Build and maintain our pixel, tags, and server-side tracking, and the conversion integrations with Meta, TikTok, Google, and others
• Build integrations with DSPs, ad platforms, and partner APIs
• Build the real-time services that deliver offers across the network, fast and reliably
• Make architecture calls on how our systems scale: service design, storage, queues, and caching
• Own reliability in production: monitoring, alerting, debugging, and incident response
• Improve developer tooling, CI/CD, and pay down tech debt where it slows us down
• Lead design reviews and code reviews, and mentor other engineers
• Help shape engineering practices and hiring as the team grows

Requirements:

• Please note: this role is a US-based role only and we cannot offer visa sponsorship for this role at this time
• You've built ad tech from the inside and know how the pieces connect, from pixel to conversion
• You like owning a system end to end, not just a ticket queue
• You're pragmatic: you ship fast on a small team without cutting corners on quality
• You think about the brand's outcome, not just whether the code ships
• You raise the bar for the engineers around you
• 6+ years building and shipping production software, with meaningful time at an ad tech company (DSP, ad platform, ad exchange, or identity provider)
• Strong backend engineering skills in Python and Typescript, including designing APIs and distributed services
• Hands-on experience building pixels, tags, SDKs, or conversion tracking, client-side and server-side
• Experience building systems that handle high request volume with low latency
• Comfort with cloud infrastructure, containers, and CI/CD
• A track record of owning systems in production, from launch through monitoring and on-call
• Identity resolution / graph networks, ecommerce or Shopify, or early-stage startup experience