Growth Engineer

FX Replay is looking for a Growth Engineer to join our Growth organization and own
the technical execution of our web, acquisition, experimentation, and conversion
infrastructure.
This is not a traditional marketing role and not a core product engineering role.
You will operate at the intersection of growth, software engineering, web design,
analytics, infrastructure, experimentation, and AI-native development.
You should be capable of taking a growth opportunity from idea to production
independently: understanding the business objective, designing the experience, building
it, integrating the required systems, instrumenting analytics, deploying it, and measuring
the outcome.
What You'll Own
 Build and evolve FX Replay's marketing and growth web experiences using
Astro, React, TypeScript, HTML, and CSS.
 Create high-quality landing pages, acquisition flows, pricing experiences,
onboarding surfaces, and conversion experiments.
 Translate ideas and business objectives into polished experiences without
requiring constant engineering or design support.
 Integrate APIs, payments, authentication, CRM, CMS, marketing platforms,
analytics systems, and third-party services.
 Own advanced web analytics and tracking architecture, including events,
attribution, funnels, conversion tracking, experimentation, and data quality.
 Design and execute A/B tests and growth experiments from implementation
through measurement.
 Own Core Web Vitals, performance, caching, CDN/edge behavior, rendering
strategies, technical SEO, structured data, and accessibility.
 Understand and operate the supporting infrastructure, including DNS, CDN,
hosting, CI/CD, observability, security, and production reliability.
 Build and maintain reusable components, design systems, tokens, and patterns for
rapid experimentation.
AI-Native Growth
AI should be a fundamental part of how you operate.
We expect deep practical experience with:
 Claude Code as a primary environment for building and operating software.
 Creating and orchestrating AI agents for research, development, analytics,
testing, and optimization.
 Building reusable Skills, commands, instructions, and agent workflows.
 Connecting agents to external systems through MCP servers.
 Designing workflows where multiple agents can independently research, build,
validate, and improve growth initiatives.
 Using AI-native design tools alongside Figma and modern design systems.
 Using agents to investigate analytics, generate experiments, analyze performance,
debug production issues, and accelerate iteration.
Using AI to autocomplete code is not enough. We expect you to understand how to design
systems of agents that materially increase your execution capacity.
What We're Looking For
 5–8+ years of strong technical experience building production web systems.
 Deep expertise in JavaScript, TypeScript, React, modern browser
technologies, HTML, and CSS.
 Strong understanding of APIs, HTTP, networking, caching, CDNs, cloud
infrastructure, and web architecture.
 Proven experience with high-performance and high-traffic web experiences.
 Deep experience with GA4, GTM, PostHog/Amplitude, Segment/CDPs,
attribution, event instrumentation, and experimentation platforms.
 Strong understanding of conversion optimization, experimentation, funnels,
and growth analytics.
 Strong visual and product judgment, including Figma, responsive design,
interaction design, typography, hierarchy, and design systems.
 Strong knowledge of technical SEO, performance, accessibility, observability,
and security.
 Advanced practical experience with Claude Code, AI agents, Skills, MCPs, and
AI-native development workflows.
 Ability to operate independently from growth opportunity → design →
implementation → instrumentation → deployment → analysis → iteration.
Ideal Profile
You are a technically exceptional Growth Engineer who can operate across marketing,
design, software, data, and infrastructure.
You do not need an engineer to implement your experiments, a designer to solve every
interface decision, or an analyst to tell you whether something worked.
You can understand a growth problem, build the complete solution, measure its impact,
and continuously improve it.
Your leverage comes not only from your technical depth, but from your ability to combine
engineering, growth judgment, design quality, analytics, and AI-native execution.

Education: Associate's in Software Engineering

15 days PTO. US Holidays. Long term contract

About our client
our client is transforming trading with cutting-edge backtesting and analysis platforms. Founded by an experienced engineer with 10+ years of full-stack development and enterprise systems experience, we're scaling rapidly (20 → 40+ engineers) and need an exceptional technical leader.