Company Name: Infinity Constellation

Job Details: Hiring,Remotely,in,USA,Remote,Mid,level

Job Url: https://builtin.com/job/full-stack-founding-ai-engineer/7309813

Job Description: Founding EngineerRemote (Global) | Full-Time | Competitive Salary + Meaningful EquityWebsite: withradiance.comPlease apply using the provided form, candidates who directly email will not be considered.Meet RadianceThe Source® of all your creative collateralRadiance is a digital design agency powered by The SOURCE® — a Creative OS that learns and evolves with your brand. As you work, it works: streamlining operations, accelerating creative, and scaling your entire brand system.We combine human-crafted design with intelligent systems to help modern brands grow with clarity, creativity, and impact.Every project is crafted for long-term value — not just assets, but infrastructure. Radiance delivers bold creative backed by strategic insight, made to perform across media, commerce, and customer experience.At the center of it all is The SOURCE® — a proprietary platform that powers everything we do. It brings together design, AI, and automation into a single, adaptive system that grows with you.Why This Role ExistsWe’re looking for a sharp, systems-minded full-stack engineer who builds with urgency, curiosity, and care. You’ll partner directly with the founders to translate ideas, client feedback, and strategic needs into real, production-grade tools.This isn’t just a role for implementing specs — it’s for someone who thrives in ambiguity, sees the edge of a fuzzy idea, talks to users, and ships features that stick.As an early hire, you'll also help shape our foundational engineering principles and how we build as a team.What You’ll DoArchitect and scale RAG pipelines, agent-based systems, and LLM-powered workflowsFine-tune large language models for structured data extraction and automationBuild developer-friendly APIs and interfaces for web automationShip product features fast — with real usage and feedbackWork closely with the team and customers to build what mattersStay ahead of the curve on LLM tools, embeddings, orchestration, and trainingCreate elegant, resilient systems that just workWhat You BringStrong full-stack engineering experience (Python backend + Vue or equivalent frontend)A systems mindset — architecture, UX, and scalability are one conversation to youHands-on familiarity with production level AI tooling: prompt design, agents, vector DBs, etc.Clear, proactive communication — you explain not just what you’re doing, but whyAutonomy — you move quickly and make things realPragmatism — you build what works, not just what’s elegantBonus PointsBuilt LLM-based agents, fine-tuned models, or designed RAG pipelines in productionContributed to open-source projects in AI, ML, or developer infrastructureExperience with AWS, Postgres, and scalable backend systemsTrained or fine-tuned foundation models from scratch or with custom dataWorked on web automation, scraping, or structured data extraction workflowsWhy Join Radiance?Founding seat. Help define the product and shape how we build from the ground upFast feedback loop. Internal users are power users — what you ship gets usedDesign-forward culture. Work alongside world-class strategists and brand thinkersRemote-first, async-friendly. High trust, low overheadMomentum. We ship features in days — not quartersCompetitive salary + meaningful equityBacked by invisible.co, and founded by repeat entrepreneursOur Interview ProcessWe keep things human, clear, and practical. The process includes a few conversations to get to know each other and either:A short project (done on your own time, then discussed in a review call)Or a collaborative working session, where we build something togetherWe’ll align on the format that works best for you.Radiance Is for You If:You think in systems and love building from zeroYou care about clean UX, smart architecture, and long-term impactYou want to work closely with founders and users to shape the productYou’re excited by creative tools, AI workflows, and fast iterationYou thrive in autonomy, take initiative, and move with purposeRadiance Is Not for You If:You need detailed specs and tightly scoped tasksYou prefer to stay in your lane and avoid user conversationsYou’re not interested in design systems or GenAIYou’re optimizing for predictability over ownership