Senior Engineer (Growth)

Jinba.io; San Francisco (CA); On-site; USD 120,000 - 150,000; Full time

Benefits offered by this job

Small team with big ownership

Early-stage startup environment

Potential for significant impact

Job summary

A dynamic startup in San Francisco is seeking a Senior Engineer (Growth) to lead the optimization of customer signups and engagement. You will work with full-stack technologies, including TypeScript and React, to build and enhance onboarding flows and marketing strategies. The ideal candidate has a track record in product growth and data fluency, along with a proactive approach. Join a small yet impactful team focused on building innovative solutions that drive enterprise workflow automation.

Qualifications

• Full-stack skills in JavaScript frameworks and databases.
• Fluency in data analysis and dashboard creation.
• Experience with product growth strategies.

Responsibilities

• Build and optimize marketing site, signup flows, and onboarding.
• Design and run A/B tests in the funnel.
• Integrate CRM and lead nurturing systems.

Skills

TypeScript

React

SQL

Python

BigQuery

Mixpanel

Tools

CRM tools (Loops, HubSpot, Segment)

Job description

Senior Engineer (Growth) — Jinba (YC W26)

Location: San Francisco
Reports to: Head of Growth

About Jinba

Jinba is the enterprise workflow automation platform that lets teams describe workflows in natural language and deploy them as APIs or MCP servers. We have 40,000+ daily enterprise users at Japanese Fortune Global 500 companies — and we're just getting started.

We're part of Y Combinator W26.

The Role

We're hiring a Growth Engineer to own the systems that turn signups into customers. You'll work across the full stack — building landing pages, instrumenting funnels, running in-app experiments — whatever it takes to move the metrics.

This is an engineering role with a growth mindset, not a marketing role with some coding involved. You'll ship real features, run real experiments, and have direct impact on revenue.

What You'll Do

• Build and optimize our marketing site, signup flows, and onboarding
• Design and run A/B tests across the funnel
• Integrate and automate our CRM and lead nurturing systems
• Ship growth features in the product (referrals, usage triggers, activation loops)
• Work directly with the Head of Growth to prioritize high-leverage experiments

What We're Looking For

• Full-stack skills: TypeScript, React, SQL, Python
• Data fluency: BigQuery, Mixpanel (or similar). You can write queries, build dashboards, and pull your own insights
• Product growth experience: You've thought about activation, retention, and conversion — not just features
• Bias to action: You ship fast, measure everything, and iterate
• Comfort with ambiguity: We're early. You'll participate in crafting high leverage hypotheses to test.

Nice to Have

• Ex-technical founder (you've built something from zero)
• Experience at a PLG or developer tools company
• Familiarity with CRM/marketing automation (Loops, HubSpot, Segment, etc.)

Why Jinba

• YC W26 — breakout startup
• Real enterprise traction before Demo Day
• Small team, big ownership
• San Francisco-based, working on hard problems