Senior Back-End Software Engineer

This role is with one of Dex's trusted partner companies. We work closely with their teams to truly understand their culture, goals, and what they're looking for, so we can match you with the right opportunity and give you context about the role before you commit to a process. If you're interested sign up to Dex to apply. Dex is an AI recruiter agent that helps you run your job search. Tell Dex your stack, seniority, and what you want to build. We will manage your applications and surface other opportunities that are a fit. The role This company is building an AI operating system for industries burdened by fragmented, unstructured data, enabling non-technical teams to make data-driven decisions. They tackle a massive, underserved market, transforming legacy systems into structured, queryable data with the power of LLMs. This is a chance to build foundational technology with significant impact, backed by leading investors. As the first US tech hire, you'll work directly with AI researcher founders, owning the backend system end-to-end. This is a foundational, high-ownership seat, not a role with hand-holding or a narrow, pre-defined scope. You'll set the standards for architecture, data quality, and deployment, shaping the technical direction from day one. The work Design and own data pipelines from ingestion through cleaning and transformation.Build orchestration workflows (Airflow-style DAGs) to ensure reliable data movement.Integrate messy customer systems—on-prem databases, CSV dumps, SFTP, legacy ERPs—into structured, queryable data.Develop the APIs and backend services that serve critical insights.Define patterns for CI/CD, testing, deploy automation, and shape the overall architecture. What You Bring 5-6+ years building and shipping backend services (exceptional mid-level engineers with 2-3 years will be considered).Strong Python across APIs and services; comfortable designing workflows, scheduling jobs, and operating orchestration tools.Owned end-to-end data pipelines, on Airflow-style DAGs or custom, with reliable and observable data movement.A driven builder who thrives on startup intensity, with a track record of shipping projects.Backend is your strength; comfort talking to customers is a bonus, not a requirement. Why apply through Dex This is a rare, high-impact founding engineer opportunity that won't be found on public job boards. Dex helps you cut through the noise of a competitive market, skipping cold applications and getting you properly briefed on roles like this one. Sign up once, and we'll match you to this and other exceptional opportunities. If you're interested, sign up to Dex to apply - https://jobs.meetdex.ai/jobs/9b329b61-2272-48d0-9d3f-2940b0a43973 As part of the recruitment process at Dex, we process your personal data in accordance with our Privacy Notice for Job Applicants. This notice explains how and why your data is collected and used, and how you can contact us if you have any concerns.