Senior Software Development Engineer (Seattle)

About Amperity—Why This, Why NowMost customer data is a lie by omission.Every consumer brand wants to know its customers. Unfortunately, almost none actually do. Data is scattered across a dozen systems, half of it contradicts the other half, and insights teams are forced to act on incomplete guesses. We started Amperity ten years ago because that gap—between what a brand believes about its customers and what is true—is the most expensive problem in the industry, and nobody had solved it.With a lot of hard work and a little bit of luck, we did. Our patented identity resolution takes billions of messy, conflicting records and resolves them into an accurate picture of a real human being—in hours, not months. That’s not a feature; it’s the foundation everything else stands on. It’s why more than 400 brands—like Alaska Airlines, Wyndham Hotels & Resorts, DICK’S Sporting Goods, Virgin Atlantic, and Brooks Running—trust us with the one thing they can’t afford to get wrong, and why IDC named us a Leader in the category in 2026.Now we’re doing something harder. We’re rebuilding Amperity as an AI-first company—not bolting a chatbot onto old software, but putting agents at the center of how customer data actually gets used. We shipped the industry’s first identity resolution agent, then the first enterprise Customer Data Agent that turns a plain-language question into a live segment without waiting on an engineering queue. The bet underneath all of it is simple, and we think it’s correct: The potential of AI will not be realized for a brand until it’s grounded and activated against a true, unified view of the customer. The market at-large is focused on intelligence, and we are focused on being the ones who can make it trustworthy.So here’s the honest pitch. If you want a tour of a category that’s already been figured out, this isn’t it. If you want to help decide what the next version of an entire industry looks like—alongside people who are remarkably exceptional at what they do, solving a problem that requires deep, sustained focus—this is one of the few places that work exists. Our goal is to build a highly impactful, generational business.We measure our success by one standard: whether what we build moves the business. Return on cognition, not return on hype. If that’s how you want to be measured, we would love to speak with you.The RoleThe MAX team drives a critical part of the platform that intersects both product and infrastructure spaces. The products we manage allow users to gain valuable insights into their data and make important decisions from those insights in ways that no other platform can. An immense data warehouse and query stack that we oversee powers these capabilities, and it analyzes some of the largest datasets that our enterprise customers can throw at us. Our horizon includes building predictive analysis tools, real-time decisioning engines, and agentic toolchains. We are biased for action, value, and succeed together in a highly collaborative environment. We are bullish on leveraging AI coding tools, such as Codex and Claude to accelerate our engineering capabilities.Interesting ProblemsOwn batching and real-time streaming systems that handle large amounts of structured customer, product, and event data.Building full-stack experiences and toolsets to help users visualize their data, understand their customers, surface the most impactful insights, and take meaningful action based on those insights.Integrate our services into the operating core of the businesses we serve.Change how marketers use their customer data through unique and intuitive product experiences.Build agentic tools for our customers to use, and an MCP to allow external AI tools to take advantage of the Amperity platform.About You5+ years of experience working with large-scale data-oriented systems. Bonus if you have experience with Trino, Spark, Delta Lake, & Kubernetes.Track record building, scaling, and managing production environments.Excited about using functional languages (like Clojure!).Passionate about building elegant user experiences on top of complex technologies.Open-minded, collaborative, inclusive, and inspired by your customers' success.Curious about using AI coding tools such as Claude and Codex to help accelerate your development.Technologies We UseOpen source large-scale database engines such as Spark & Trino.Microservices architecture using Clojure as the primary programming language.A web stack based on ClojureScript and the React family of tools.Cloud-first architecture using technologies like Terraform and Kubernetes in a multi-cloud platform.Claude for development with various MCPs to increase its effectiveness.LocationSeattle, WA Amperity’s work model operates on four in-office days each week and one designated remote workday on Wednesdays. We value the collaboration, connection, and learning that come from working together in person.CompensationBase Salary: $178,000-$245,000. Individual compensation within this range will depend on several factors, including your skills, experience, education/training, geographic location and the level at which you join. We also consider internal equity, market conditions, and overall business needs.Cash Incentives: Cash incentives are also available.Stock Options: The opportunity for ownership is an exciting part of Amperity’s total compensation package. Every employee at Amperity receives a new-hire equity grant, commensurate with the scope of their position.BenefitsWe offer all the benefits you'd expect from a great place to work: 100% employee healthcare coverage, transportation subsidies, a comfortable work environment with plenty of snacks, and other employee experience perks like events and activities, both in-person and remote. We also offer self-managed PTO and the flexibility to do your best work in the way that works for you. We provide an inclusive environment where you'll be challenged to find and unlock your full potential, surrounded by a team of world-class people driving for excellence. For more details on our benefits, please see our US Benefits & Perks Guide.Amperity is proud to be an equal opportunity employer. We do not discriminate on the basis of race, religion, color, national origin, sex (including pregnancy, childbirth, and reproductive health choices), sexual orientation, gender identity, gender expression, age, status as a protected veteran, status as someone with a disability, political views or activity, or other applicable legally protected characteristics. We also consider qualified applicants with criminal histories, consistent with applicable federal, state, and local law.