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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Sr. Full-Stack Founding Engineer - **Company:** Covenant Consulting - **Location:** Kansas City, MO, United States (Remote available) - **Experience:** Expert - **Salary:** $150,000.0 - $200,000.0 - **Contract:** Permanent contract - **Skills:** Java (Programming Language), .NET Framework, Application Programming Interfaces (APIs), Artificial Intelligence, Computing Platforms, Software as a Service, Django Web Framework, Design of User Interfaces, Python (Programming Language), PostgreSQL, Query Optimization, Next.js, Service Layer, TypeScript, Web Services, ReactJS, Flask (Web Framework), Large Language Models, Backend, Fastapi, Data Layers, Enterprise Integration, Build Tools, Data Management, Front End Software Development, Pagination, Marketplace, GPT, Data Pipelines - **Published:** July 10, 2026 - **Apply:** https://www.careerjet.com/job/us91cc07b46873fc1ce9265d1db4495779/eaa ## About the Role * 4+ years building production SaaS - you have owned auth, multi-tenancy, billing, and deployment as a system, not as someone else's problem. * Full-stack TypeScript - comfortable across the frontend and backend; our stack is Next.js with a modern Postgres-backed backend-as-a-service layer (Supabase/Deno). * Front-end craft - as a founding engineer you own UI design decisions and build clean, functional user-facing features in React / Next.js and TypeScript. * Python web service experience - FastAPI, Flask, Django, or similar; we run Python services for data pipelines and AI workloads. * LLM integration experience - you have shipped a real product feature using an AI model (Claude, GPT, or similar) in a production workflow. * Third-party integration experience - you have wired up enterprise APIs, handled rate limits, and recovered gracefully when upstream services misbehave. * Strong Postgres - row-level security, views, and query optimization; not just ORM-level familiarity. * Data management & analysis - comfortable working with data across systems, validating it, and analyzing it to make sure it's accurate and usable, not just stored. * Early / founding engineer background - you have built in a small-team environment before and know how to make a decision, ship it, and fix it if it's wrong. * Open-stack orientation - modern web/cloud tooling; this is not a Java or .NET shop * Cultural fit - ownership, directness, and the ability to move fast without heavy process. NICE TO HAVE: * Direct experience with Claude / Anthropic models. * Experience with Supabase and Deno Edge Functions specifically. * E-commerce or marketplace platform experience (catalog, cart, checkout, payments, order lifecycle). * Construction tech, field-operations software, or other complex multi-stakeholder platform experience. ## Description Our client is a sixth-generation, family-owned heavy/civil contractor based in Kansas City, in business since 1880. They have built 845+ bridges and placed 3,500+ lane miles of pavement across the Midwest and is currently behind some of the region's largest infrastructure projects. Underneath that 145-year track record, our client is investing in modern technology - including a new AI-powered software platform meant to bring everyone on a complex project (contractors, craftsmen and field supervisors, estimators, architects, mechanical and electrical engineers, quality control, and project management) together on one system. As a Sr. Full-Stack Founding Engineer, you will help build this platform from an early stage, working directly with the CTO. This is a high-ownership, full-stack role - you own features across the entire stack, make real architecture decisions, ship them, and keep improving on the results. This is not a maintenance role on someone else's system; it is a builder's seat inside a company that builds physical infrastructure and is now investing seriously in software and AI. RESPONSIBILITIES: Build & Own the Stack * Design, build, and ship full-stack features across frontend, backend, and data layers. * Own systems end-to-end - auth, multi-tenancy, billing, and deployment - as connected concerns, not isolated tickets. * Make pragmatic architecture decisions early, ship them, and refine as the product and requirements evolve. AI & Data * Build and maintain Python services that power data pipelines and AI workloads. * Integrate LLMs (Claude / Anthropic and others) into real product workflows - not demos. * Apply sound data modeling and query design in Postgres to keep the platform fast and reliable as it scales. Integration & Reliability * Wire up third-party and enterprise APIs, handling authentication, rate limits, and pagination. * Build systems that recover gracefully when upstream services misbehave. Team & Culture * Collaborate directly with the CTO and early team to set technical direction. * Contribute to a fast-moving, low-process culture that values ownership, directness, and judgment. ## Related Videos - [Under the Hood of Building on Lovable](https://www.wearedevelopers.com/videos/100032-under-the-hood-of-building-on-lovable) - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [Intro to FastAPI](https://www.wearedevelopers.com/videos/462-intro-to-fastapi) - [ Evaluating AI models for code comprehension](https://www.wearedevelopers.com/videos/1462-evaluating-ai-models-for-code-comprehension) - [Meet Your New BFF: Backend to Frontend without the Duct Tape](https://www.wearedevelopers.com/videos/682-meet-your-new-bff-backend-to-frontend-without-the-duct-tape) - [Nest.js - TypeScript in the backend can also be clean](https://www.wearedevelopers.com/videos/1033-nest-js-typescript-in-the-backend-can-also-be-clean) ## Related Articles - [Dev Digest 120 - Apple and peers](https://www.wearedevelopers.com/magazine/455-dev-digest-120-apple-and-peers) - [Navigating the AI Shift](https://www.wearedevelopers.com/magazine/629-navigating-the-ai-shift) - [Dev Digest 121 - AI goes offline](https://www.wearedevelopers.com/magazine/456-dev-digest-121-ai-goes-offline) - [The Best X (Twitter) Accounts for Developers](https://www.wearedevelopers.com/magazine/294-the-best-x-twitter-accounts-for-developers) - [Never delegate the understanding](https://www.wearedevelopers.com/magazine/749-never-delegate-the-understanding) - [Dev Digest 132 - Binging WADFlix?](https://www.wearedevelopers.com/magazine/473-dev-digest-132-binging-wadflix)