Full Stack Engineer

Responsibilities

• Drive features from problem framing through design partnership, full-stack implementation, instrumentation, rollout, and experimentation with clear line of sight to PLG metrics.
• Build the next version of LaunchDarkly's onboarding, including agentic flows that work inside a developer's IDE and plug into MCP servers and LLM-powered tooling.
• Instrument and analyze the growth funnel: signup, activation, first flag, first experiment, first paid conversion. Run experiments that move each step.
• Ship MCP server capabilities and agent skills that extend LaunchDarkly into the tools customers already use.
• Partner closely with PM, design, and data analyst to turn qualitative signal from self-serve customers into shippable experiments.
• Dogfood LaunchDarkly. Use flags, guarded rollouts, and experimentation on your own work.
• Support applications in production, including on-call.

Requirements

• 5+ years of full-stack engineering experience, with a portfolio of features driven from idea to production.
• Shipped AI-first features in production using MCP servers, agent frameworks, or LLM tool-use.
• Strong with TypeScript and React on the frontend. Able to hold your own in Go or Node on the backend.
• Track record of moving product-led growth metrics. Hands-on experience with instrumentation, funnel analysis, and A/B testing.
• Comfortable defining a hypothesis, wiring up a flag, running the test, reading the result, and changing your mind.
• Good instincts for developer onboarding. Collaborative engineer who works well alongside product and design.
• Genuine interest in where AI belongs in a developer platform.

Nice-to-Haves

• Experience with agent frameworks and LLM-powered tooling in production environments.