Front-End Systems Engineer for A/B Testing & Scalable UX

Jobtailor; Austin (TX); On-site; USD 140,000 - 190,000; Full time

Job summary

Jobtailor in Austin seeks a product-minded front-end or full-stack engineer to deliver customer-facing UI experiences and run A/B experiments to accelerate user acquisition, engagement, and retention. You will architect scalable front-end solutions and build features end-to-end across front-end, back-end, IaC, and testing.

Collaborate with product, design, and analytics teams to define outcomes, instrument telemetry, and drive dashboards for business KPIs, while refining performance, security,

Qualifications

• Experienced, product-minded front-end or full-stack engineer.
• Proficiency in TypeScript/JavaScript for UI components and SDKs.
• Strong knowledge of HTML, CSS, and modern JS ecosystems.
• Experience with high-scale serverless systems (Cloudflare Workers, AWS Lambda, Azure Functions).
• Experience designing interfaces for business KPIs such as onboarding and adoption.
• Experience running A/B experiments and using feature flags.

Responsibilities

• Deliver customer-facing UI experiences and A/B experiments.
• Architect scalable front-end solutions end-to-end.
• Partner with product, design and analytics to define outcomes.
• Track behavior attribution and influence product roadmaps.
• Enhance performance, security, and developer productivity.
• Ensure trust and safety compliance across experiences.

Skills

TypeScript/JavaScript

A/B Testing

System Design

RESTful APIs

Cloudflare Workers

AWS Lambda

Azure Functions

HTML

CSS

Go/Python/Rust (bonus)

Tools

Google Analytics

Adobe Analytics

Feature Flags

Telemetry

Job description

Jobtailor in Austin seeks a product-minded front-end or full-stack engineer to deliver customer-facing UI experiences and run A/B experiments to accelerate user acquisition, engagement, and retention. You will architect scalable front-end solutions and build features end-to-end across front-end, back-end, IaC, and testing.

Collaborate with product, design, and analytics teams to define outcomes, instrument telemetry, and drive dashboards for business KPIs, while refining performance, security,