Product Marketing / GTM Engineer

Lightsprint (YC P26); San Francisco (CA); On-site; USD 120,000 - 180,000; Full time

Job summary

Lightsprint in San Francisco is seeking a Growth Lead to own end-to-end growth, ship in code, and treat Lightsprint.ai as a product. You’ll design, build, measure, and iterate across landing pages, onboarding, and activation for a PLG SaaS.

You’ll work directly with the founders, run experiments, and build analytics and attribution to drive signups to paid. Strong React/TypeScript and AI tooling are a plus, with the ability to turn data into actionable growth moves.

Qualifications

• 3+ years driving growth at a PLG or developer-facing SaaS (early-stage)
• Proficient in React/TypeScript and modern CSS; able to ship production web work
• Experience with analytics, attribution tooling, and running clean experiments
• Full-stack marketing judgment: write headlines, design pages, build and read results

Responsibilities

• Own the funnel: measure and improve signups, onboarding, activation, and paid conversion.
• Ship growth experiments in code: landing pages, demos, referral loops, programmatic SEO, comparison pages.
• Build the marketing site as a product: lightsprint.ai performance and conversion infrastructure.
• Run lifecycle and PLG motions: onboarding emails, activation nudges, upgrade prompts.
• Make data the default: set up analytics and attribution to ground decisions in numbers.

Skills

Growth hacking

React/TypeScript

Analytics & attribution

Experiment design

PLG / SaaS growth

Tools

Cursor

Claude Code

Job description

• You'll own growth end to end - and you'll ship it yourself, in code, using the same AI-agent workflow our customers use. Landing pages, growth loops, lifecycle emails, attribution, SEO infrastructure: if it drives signups or activation, it's yours to design, build, measure, and iterate.

• The role
• You'll own growth end to end - and you'll ship it yourself, in code, using the same AI-agent workflow our customers use. Landing pages, growth loops, lifecycle emails, attribution, SEO infrastructure: if it drives signups or activation, it's yours to design, build, measure, and iterate.

We have paying customers, a validated enterprise price point, and a self-serve motion that’s just getting started. Your job is to turn that into a compounding growth engine. You’ll work directly with the founders and have unusual leverage: Lightsprint itself is your build tool.

What You’ll Do

• Own the funnel. Instrument it, understand it, and systematically improve every step from first touch to activated team - signups, onboarding, conversion to paid.
• Ship growth experiments in code. Landing pages, interactive demos, referral loops, programmatic SEO, comparison pages - built fast, measured honestly, killed or scaled without ego.
• Build the marketing site as a product. Own lightsprint.ai: performance, conversion, experimentation infrastructure, and the craft that makes it feel like the product it sells.
• Run lifecycle and PLG motions. Onboarding emails, activation nudges, upgrade prompts, and the in-product moments that turn a curious PM into a paying team.
• Make data the default. Set up analytics and attribution so every decision - paid, content, product-led - is grounded in what actually moves the numbers.

Requirements

• You’ve driven growth at a PLG or developer-facing SaaS company - ideally early-stage, where you owned outcomes, not just channels. 3+ years of relevant experience.
• You can build. Comfortable shipping production-quality web work (React/TypeScript, modern CSS) and fluent with AI build tools like Cursor and Claude Code.
• Strong analytical instincts. You design clean experiments, know your way around analytics and attribution tooling, and can find the story in the data yourself.
• Full-stack marketing judgment. You can write the headline, design the page, build it, and read the results and you know which of those matters most this week.

Nice-to-have

• Experience with programmatic SEO or content-led growth at scale.
• Experience marketing to both technical and non-technical audiences.
• Familiarity with the AI coding / agent tooling landscape and its buyers.
• Paid acquisition experience (LinkedIn, X, Google) with real budgets.
• Past founder or 0-to-1 experience.