Frontend signal online

Jeffery ParleSoftware Engineer II

Frontend-leaning engineer building React, TypeScript, Shopify, and API-driven ecommerce tools for teams that need reliable UI, measurable conversion gains, and production-aware delivery.

Contact JefferyLinkedInView Work

3+

years shipping frontend work

183%

category flow lift contribution

8%

add-to-cart lift contribution

Global

multi-brand ecommerce rollout

Selected builds

Business tools with storefront instincts

The strongest portfolio story is not just the stack. It is the work behind pricing autonomy, partner visibility, international storefront migration, and measurable funnel improvements.

INTERNAL TOOL_01

Price App

A React-powered pricing workflow that lets business teams create and adjust product price grids across global storefronts without waiting on engineering handoffs.

ReactAxiosJSON APIsValidationPricing UX
  • Reduced engineering dependency for pricing updates.
  • Focused on clear state, reliable API flows, and maintainable business logic.

OPS SYSTEM_02

Partner Cost Tracking App

A TypeScript and Tailwind application for partner-facing cost visibility, structured data entry, and more predictable collaboration workflows.

ReactTypeScriptTailwind CSSAPI workflows
  • Component-driven frontend architecture.
  • Built around validation, repeatable states, and business-readable UI.

STOREFRONT GRID_03

Global Shopify Migration

Reusable Shopify themes and frontend patterns for international brands, designed for rollout safety, maintainability, and consistent storefront behavior.

ShopifyLiquidJavaScriptReusable themes
  • Supported multi-site migration work across active ecommerce brands.
  • Balanced consistency, performance awareness, and low-disruption releases.

Career log

Frontend delivery under production pressure

Jeffery's background pairs ecommerce UI delivery with operational problem solving: the same instincts that help a team ship visible work without breaking active buying paths.

CURRENT_01

Software Developer

SelectBlinds

Apr 2025 - Present

  • Develops internal React and TypeScript tools for pricing, partner costs, and business workflows.
  • Builds reusable Shopify themes for a global site migration across multiple international brands.
  • Debugs production ecommerce issues with analytics, tag management, experimentation, and Core Web Vitals context.

CONVERSION_02

Junior Frontend Developer

SelectBlinds

Mar 2023 - Apr 2025

  • Contributed to product page improvements tied to an 8% add-to-cart lift.
  • Helped redesign category pages that increased progression to the next purchase step by 183%.
  • Maintained storefront UI across Razor, Liquid, JavaScript, HTML, CSS/SCSS, Bootstrap, and responsive layouts.

OPERATIONS_03

Problem Solver

Amazon

Feb 2022 - Mar 2023

  • Handled operational exceptions in high-volume systems by finding root causes and coordinating fixes.
  • Built production-support habits around urgency, communication, and ownership.

Skill matrix

Readable systems, sharp interfaces

The site foregrounds the skills most relevant to frontend roles: declarative UI, ecommerce integrations, performance, production debugging, and API-backed workflows.

Frontend Interface

ReactTypeScriptNext.jsTailwind CSSResponsive UIComponent systems

Commerce Systems

ShopifyLiquidReusable themesStorefront UXCheckout-aware UIGlobal brands

Performance Ops

Core Web VitalsBundle awarenessBrowser debuggingAccessibility-aware implementationProduction defects

API + Data Layer

REST/JSONAxioszodNode.jsExpressPrismaSQL

Phoenix-based frontend engineer

Available for frontend, ecommerce, platform UI, and developer-tool work where React, TypeScript, and clear delivery judgment matter.

Certification trace

Build AI-Powered Apps - Code With Mosh
Mastering Next.js 13 with TypeScript - Code With Mosh
The Ultimate TypeScript Course - Code With Mosh
React 18 for Beginners - Code With Mosh
The Frontend Developer Career Path - Scrimba
The Web Developer Bootcamp 2023 - Udemy