Software Engineer

Company Description Helium is an AI-driven personalization platform designed for eCommerce brands, focused on tailoring every aspect of a user’s journey on a website. The platform combines product intelligence, visitor insights, and brand data to deliver highly relevant content and product recommendations. By understanding each visitor’s unique context and preferences, Helium helps brands increase engagement and improve conversion rates. Its technology integrates smoothly with existing systems, enabling teams to adopt personalization with minimal disruption while maximizing impact on customer experience. We're looking for a product-minded engineer to help build Helium. You'll work across the stack in TypeScript, React, and Next.js, and you'll ship features powered by LLMs — not as a gimmick, but as a core part of the product. You'll own things end-to-end: from a rough idea to something customers use in production. We're a small team, so your judgment compounds. You might be a great fit if you:

• Are fluent in TypeScript and have shipped real apps with React / Next.js
• Have built with LLMs — prompting, streaming, evals, tool-use, or RAG
• Care about latency, DX, and the details users feel
• Think in terms of products and outcomes, not just tickets Nice to have:
• Experience with Postgres / Supabase, edge runtimes, or background jobs
• A side project you can point to and say "I built this" Tech you'll touch: TypeScript, React, Next.js (App Router), Postgres/Supabase, the Anthropic & OpenAI APIs, Vercel. The hiring process 1. Apply & present your case — share your details and answer a few questions written just for you. 2. Build assignment — pick one of three mini-tools and build it. Take a few days; we care about taste and judgment, not polish. 3. Final conversation — walk us through what you built and meet the team.