• Build, maintain, and optimize the physical network and compute layer of on‑premises environments. • Ensure reliability, performance, and scalability of networks, firewalls, server hardware, racks, power, cabling, and related physical systems. • Deploy, install, rack, cable, and power physical servers, storage systems, and supporting hardware. • Perform hardware diagnostics, break/fix tasks, component replacement, and lifecycle upgrades. • Manage firmware, BIOS, and device‑level updates. • Maintain accurate inventory of physical compute assets, spares, and components. • Design, deploy, and manage enterprise network infrastructure using Cisco technologies. • Architect and implement AWS networking solutions.

• Collaborate with other engineers to architect core systems for Inngest, including message streams, real-time connectivity to external clients, consistent hashing caches, etc. • Collaborate with systems engineers to help develop our execution engine, state store, etc. (in Go) • Develop internal tooling (in Go) to manage our systems • Provision and monitor systems on public clouds, bare metal, and, in the future, our own hardware. • Ensure our systems are up to date and secure

About Delphina Today’s Data Scientists are in pain - spending their time manually wrangling data, building models through slow trial and error, taking on painstaking rewrites for deployment, and dealing with countless other frustrating bottlenecks. And the tools they are using for much of this work – e.g. Jupyter notebooks and Pandas – are over a decade old. We founded Delphina to change this: our mission is to help the world get better at using data to understand the present and predict the future. Delphina is an AI Agent for Data Science: leveraging a combination of generative AI, large scale optimization, and specialized infrastructure to automate the time-consuming but necessary tasks to build powerful ML models quickly; Delphina will identify relevant data, clean it, train models, and even productionize pipelines. Our team has previously led large data science and machine learning teams (covering both applications and infrastructure), built startups, and created successful tools for enterprise ML. We're backed by top AI investors, including Fei-Fei Li, Radical VC, and Costanoa VC. What you’ll do We're looking for an experienced ML Infrastructure Engineer to join as a Member of our Technical Staff of Delphina. As one of our key early hires, you will partner closely with our early team on the direction of our product and drive critical technical decisions. You will have broad impact over the technology, product, and our company's culture. You will be responsible for: Developing platforms that enable scientists, researchers, developers to run ML jobs easily and quickly at scale using the latest technologies Developing solutions that will orchestrate and support massive quantities of data through stages like ingestion, indexing/mining, transformation, machine learning, online deployment Defining a consistent continuous integration/deployment model that will encourage cross-functional development teams to self-service application unit testing, deployment and operations Influencing and lead cross-functional initiatives that will align the team towards commonly used technologies and methodologies What we’re looking for Proficiency in multiple programming languages relevant for such systems (e.g. Python, Rust, C++, Go, Java) Knowledge about what it takes to deploy and operate high availability production systems in the cloud Experience designing service-oriented architectures and leveraging various data store technologies Energy and ambition to build a product that is surprisingly good in surprising ways Intrinsic desire to always be improving our product and yourself. Growth mindset to both stay ahead of the curve and pick up whatever knowledge you're missing to get the job done Nice to haves Experience working directly on machine learning models – either by partnering with scientists and engineers who are building models, or by building models yourself Experience leading cross functional teams through ambiguous problems Benefits Equity in the company Medical, dental, and vision insurance 401k Unlimited PTO Top of the line Apple equipment Free lunch in the office

About Polymarket Polymarket is the world’s largest prediction market platform. We enable individuals to express views on real-world events by trading on outcomes across politics, economics, sports, culture, and current affairs. Built as a peer-to-peer marketplace with no centralized “house,” Polymarket aggregates diverse opinions into transparent, market-based probabilities that reflect collective expectations about the future. We're growing fast – both in terms of volume ($21B traded in 2025) and adoption as an alternative news source. Our ambition is to become a ubiquitous beacon of truth in global media and we need your help adding fuel to the fire. About the Role Polymarket is looking for a world-class infrastructure engineer to join our team and help scale the systems that power our products. You’ll be responsible for designing, building, and maintaining the backbone of our engineering platform—from developer workflows and CI/CD pipelines to core infrastructure that supports high-performance APIs and data services. You’ll have the autonomy to make big technical decisions, drive system architecture, and implement solutions that balance speed, reliability, and long-term maintainability. What You’ll Do We're looking for an experienced individual contributor who enjoys optimizing mission-critical infrastructure. Build & automate development workflows. You’ll design and maintain infrastructure that standardizes how we develop, version, test, and deploy software across environments. Architect scalable systems. You’ll make thoughtful architectural decisions and tradeoffs, balancing risk, performance, cost, and maintainability. Power high-performance services. You’ll contribute to infrastructure supporting real-time APIs and low-latency data feeds. Develop testing infrastructure. You’ll build robust tooling for automated testing at all levels—from unit to integration to API. Ensure availability & reliability. You’ll own critical infrastructure that minimizes downtime and reduces risk of failure. Move fast without breaking things. You’ll deliver high-quality solutions quickly, with a strong sense of ownership and attention to detail. Operate autonomously. You’ll take initiative and make independent decisions—no micromanagement here. Collaborate across teams. You’ll work closely with engineers throughout the company to support deployment, performance, and operational needs. What We’re Looking For 6+ years of hands-on experience in software engineering, with a strong track record of delivering production-grade systems. Deep familiarity with cloud infrastructure and DevOps tooling, including AWS, Kubernetes (K8s), Terraform, Kafka, load balancing, ElasticCache, messaging queues, Flux, Docker, GitHub Workflows, Cloudflare, FluxCD, PostgreSQL, MongoDB, Redis, S3, Lambda, and AWS networking (VPCs, VPC Peering). Excellent communication skills and a strong desire to learn, grow, and collaborate effectively across teams. Solid technical acumen and a results-driven mindset, capable of solving complex engineering challenges with practical solutions. Proven history of improving engineering workflows, through the creation and implementation of new tools and processes that boost efficiency and consistency. Leadership experience in planning and executing large-scale projects, with lasting impact on core systems or engineering teams. Ability to ship quickly and iterate fast, without compromising quality. Exceptional judgment in prioritizing tasks, balancing urgency with strategic importance. Growth-oriented mindset, with a steep learning curve and an eagerness to evolve with the role. Genuine passion for engineering—you take pride in your craft and strive for excellence in everything you build. Specialized expertise in at least one of the following areas: Networking: demonstrated ability to diagnose and resolve complex network-related issues. Security: Relevant certifications, such as CISSP, CISM, or AWS certifications, or equivalent experience in designing secure systems. (PLUS) Proven experience building deployment systems in: K8S RDS / PSQL IAM policies/roles ElasticCache Cloud Networking (VPC peering, subnets, etc) Benefits Competitive salary & equity Unlimited PTO, Health, Vision, & Dental coverage 401k match Hardware setup — new MacBook Pro, big display, & accessories.