# Full Stack Engineer

**Company:** [Launchdarkly](https://hotfix.jobs/companies/launchdarkly)
**Location:** Remote
**Role:** Fullstack Engineering
**Salary:** $146k – $235k/yr
**Experience:** 5+ years
**Skills:** TypeScript, React, Go, Node.js, Mcp Servers, Llm Tool-Use, Agent Frameworks, A/B Testing, Instrumentation, Funnel Analysis
**Posted:** 2026-06-09

> Build agentic onboarding flows and MCP server capabilities that extend LaunchDarkly into developer tools. Drive PLG metrics through full-stack features, experimentation, and funnel analysis.

## Job Description

## 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.

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**Canonical:** https://hotfix.jobs/jobs/5add5225-b085-4e74-8f96-a44720d9d8b7