Infinity Constellation
Infinity Constellation

Full Stack Founding AI Engineer

July 5, 2025
Full-time
Remote · New York, NY
Entry level
Full-stack Developer
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Founding Engineer

Remote (Global) | Full-Time | Competitive Salary + Meaningful Equity

Website: withradiance.com

Please apply using the provided form, candidates who directly email will not be considered.

Meet Radiance

The Source® of all your creative collateral

Radiance 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 Exists

We’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 Do

  • Architect and scale RAG pipelines, agent-based systems, and LLM-powered workflows
  • Fine-tune large language models for structured data extraction and automation
  • Build developer-friendly APIs and interfaces for web automation
  • Ship product features fast — with real usage and feedback
  • Work closely with the team and customers to build what matters
  • Stay ahead of the curve on LLM tools, embeddings, orchestration, and training
  • Create elegant, resilient systems that just work

What You Bring

  • Strong full-stack engineering experience (Python backend + Vue or equivalent frontend)
  • A systems mindset — architecture, UX, and scalability are one conversation to you
  • Hands-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 why
  • Autonomy — you move quickly and make things real
  • Pragmatism — you build what works, not just what’s elegant

Bonus Points

  • Built LLM-based agents, fine-tuned models, or designed RAG pipelines in production
  • Contributed to open-source projects in AI, ML, or developer infrastructure
  • Experience with AWS, Postgres, and scalable backend systems
  • Trained or fine-tuned foundation models from scratch or with custom data
  • Worked on web automation, scraping, or structured data extraction workflows

Why Join Radiance?

  • Founding seat. Help define the product and shape how we build from the ground up
  • Fast feedback loop. Internal users are power users — what you ship gets used
  • Design-forward culture. Work alongside world-class strategists and brand thinkers
  • Remote-first, async-friendly. High trust, low overhead
  • Momentum. We ship features in days — not quarters
  • Competitive salary + meaningful equity
  • Backed by invisible.co, and founded by repeat entrepreneurs

Our Interview Process

We 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 together

We’ll align on the format that works best for you.

Radiance Is for You If:

  • You think in systems and love building from zero
  • You care about clean UX, smart architecture, and long-term impact
  • You want to work closely with founders and users to shape the product
  • You’re excited by creative tools, AI workflows, and fast iteration
  • You thrive in autonomy, take initiative, and move with purpose

Radiance Is Not for You If:

  • You need detailed specs and tightly scoped tasks
  • You prefer to stay in your lane and avoid user conversations
  • You’re not interested in design systems or GenAI
  • You’re optimizing for predictability over ownership