Senior Software Engineer (Ad Tech Focus)

Mate.

Los Angeles, New York (CA, NY)

Hybrid

USD 150,000 - 230,000

Full time

2 days ago

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Benefits offered by this job

Equity in a fast-growing company

Medical/dental/vision coverage

4 weeks PTO + health days

401k plan

Remote-first culture

Company retreats 2x a year

Job summary

Mate. is seeking a senior backend engineer to design, build, and ship the core systems behind mate: the pixel, tracking, and ad delivery services brands plug into daily.

If you've built production systems inside a DSP or ad tech and know how pixels and conversions work, this is a leadership role on a small team that ships fast, with ownership from design to production. This US-based role requires hands-on architecture decisions, reliability in production, and mentoring newer engineers as the

Qualifications

You've built ad tech from the inside and know how the pieces connect.
Own a system end to end, not just a ticket queue.
Pragmatic: ship fast on a small team without cutting corners on quality.
Think about the brand's outcome, not just WHETHER the code ships.
Raise the bar for the engineers around you.

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

Skills

Backend engineering

Python

Typescript

APIs design

Distributed systems

Cloud infrastructure

CI/CD

Production ownership

Pixels/Tags/SDKs

Tools

Docker

Kubernetes

REST APIs

Job description

About Checkmate and Mate.

Checkmate is a multichannel offers network loved by 100M shoppers and hundreds of leading brands.

mate. is your AI growth teammate, the data network that agentically turns customer intelligence into revenue.

Checkmate is the distribution network, with 100M+ shoppers and 12B+ live intent signals. mate is the AI layer built on top of it: it resolves anonymous visitors, spots the revenue a brand is missing, and builds and executes the campaigns to capture it.

The combination is rare: a consumer product shoppers love and an AI growth engine brands depend on.

We work with leading brands like Everlane, Brooklinen, and Malbon, and we're backed by Google Ventures, Mantis VC, Fuel Capital, and others.

We're a remote-first team with hubs in LA and NYC, and a preference for hiring in or near major cities.

Role Overview

You'll design, build, and ship the core systems behind mate: the pixel, tracking, and ad delivery services that brands plug into and rely on every day. If you've built production systems inside a DSP, an ad platform, or an ad tech company and know how pixels and conversions actually work under the hood, this is a senior seat where you'll own real architecture decisions on a small team that ships fast.

Please note: this role is a US-based role only and we cannot offer visa sponsorship for this role at this time.

What You'll Do

Build and ship core product

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

Ad tech infrastructure

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

Architecture and reliability

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

Engineering leadership

Lead design reviews and code reviews, and mentor other engineers
Help shape engineering practices and hiring as the team grows

Who You Are

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: 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.

What You Bring

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

Bonus: Identity resolution / graph networks, ecommerce or Shopify, or early‑stage startup experience.

Why This Role Matters

Mate only works if the systems underneath them are fast, reliable, and plugged into the ad platforms brands already buy on. This engineer builds that foundation. Get it right and brands see clearer results, buy more effectively, and spend more with us. It's one of the highest‑leverage engineering seats at the company

Compensation & Benefits