Open to Frontend / React.js roles

Ariell
Olegario.

Frontend-focused engineer with 5+ years building scalable web applications, leading teams, and shipping high-impact digital products with React.js, Next.js, and TypeScript.

Silang, Cavite, Philippines

Get in touch Download CV
  • 5+ years experience
  • React · Next.js · TypeScript
  • Led teams of 7
feat: shipped KYC platform
ARIELL / ENGINEERING
01
02
03
04
05
06
07
08
09
// From idea to production.
const engineer = await ariell.hire({
  role: 'Software Engineer',
  focus: ['React.js', 'Next.js', 'TypeScript'],
  experience: '5+ years',
  leadership: true,
  curiosity: Infinity
});
// ✓ ready to ship
main All checks passed
CurrentlyBuilding @ Yondu
SCROLL TO EXPLORE
The right tools.
Used well.
  • React.js
  • Next.js
  • TypeScript
  • JavaScript
  • Tailwind CSS
  • Redux
  • Jest
  • Git
  • Figma
  • Vercel
About me

Clean frontends.
No unnecessary complexity.

I'm a results-driven Software Engineer with 5+ years of experience building scalable web applications, leading frontend development, and delivering high-impact digital solutions — from fintech KYC systems and payment flows to e-commerce platforms and brand websites.

I have a proven track record of improving system performance, reducing delivery timelines, and leading cross-functional teams. My core stack is React.js, Next.js, and TypeScript with Tailwind CSS, Redux or Zustand for state, and Jest with React Testing Library for tests — and I love designing reusable frontend architectures that help whole teams ship faster.

Silang, Cavite, Philippines

5+
Years experience
~70%
Faster project setup
7
Developers led
Experience

Not just shipped.
Built to make a difference.

Five-plus years across fintech, e-commerce, and consumer brands — from sole engineer to team lead.

/01

Yondu

Software Engineer — ReactJS

Jan 2023 — Present

4 client engagements across insurance, fintech, and food & beverage brands.

ClientPacific Cross Philippines (KYC Platform)
  • Sole frontend engineer responsible for building a web-based KYC system from scratch
  • Digitized and automated identity verification workflows, reducing manual processing time from hours to minutes
  • Implemented secure data capture, validation, and error handling for sensitive customer information
  • Integrated frontend with backend APIs for real-time document processing and verification tracking
  • Collaborated with compliance and business teams to ensure alignment with regulatory requirements
  • Improved user experience and completion rates through responsive design and optimized workflows
ClientUNI-ADA (under 917Ventures)
  • Developed UI for bank enrollment, payment authorization, and transaction tracking
  • Integrated REST APIs for automated debit processing
  • Implemented secure validation and handling of financial data
ClientShakey's Philippines
  • Developed responsive web applications for ordering systems and loyalty platforms
  • Frontend development of the corporate website, improving performance and UX
  • Integrated REST APIs and third-party services for seamless transactions
  • Collaborated with marketing and backend teams to deliver campaign features
  • Improved site performance and cross-browser compatibility
ClientPeri-Peri Chicken
  • Frontend development of the corporate website, improving UX and responsiveness
  • Built campaign landing pages supporting marketing initiatives and promotions
  • Optimized performance and ensured cross-browser compatibility
/02

OPSOLUTIONS

Software Engineer II — Technical Lead

Jul 2021 — Jan 2023

Technical lead for a client e-commerce platform and the company's internal frontend platform.

ClientJardine Distribution Inc (E-commerce Platform)
  • Led a cross-functional team of 4 frontend and 3 mobile developers delivering a large-scale e-commerce platform
  • Oversaw frontend architecture, ensuring consistency, scalability, and maintainability across web and mobile
  • Mentored developers through code reviews, technical guidance, and best practices
  • Coordinated sprint planning, task delegation, and progress tracking for on-time delivery
  • Implemented coding standards, unit testing, and development workflows to reduce defects
  • Contributed to core features including product listings, checkout flows, and user interactions
InternalInternal Frontend Platform (ReactJS Template & CMS)
  • Led development of an internal ReactJS starter platform with reusable UI components, CMS integration, and preconfigured REST API architecture
  • Reduced project setup and delivery time by ~50–70%, enabling new projects to be completed in ~2 months
  • Standardized frontend architecture and workflows across teams, improving consistency and maintainability
  • Guided adoption of the platform and mentored developers to ensure effective usage across teams
/03

Aruze Gaming

System Programmer

Oct 2019 — Jun 2020

Internal tools for data computation, visualization, and reporting.

InternalInternal Tools
  • Developed internal applications to help cross-functional teams manage deliverables, data computation, and visualization
  • Designed and implemented data processing and visualization features to support decision-making and reporting
  • Built tools that streamlined workflows and improved efficiency across multiple departments
  • Gathered requirements from stakeholders and contributed to debugging, testing, and system reliability
// my standard

Great software.
Built for people. Designed to last.

Selected work

Real products.
Measurable impact.

Case studies from client and internal work. Client details are limited by NDA — happy to walk through them in an interview.

01
Capture
→
02
Validate
→
03
Process
→
04
Track
/01NDA · details limited
★ Featured · Client work · Insurance

KYC Platform — Pacific Cross

A web-based identity verification system, built from scratch as the sole frontend engineer.

Problem
Identity verification was a manual process that took hours per customer.
Built
The full KYC frontend: secure data capture, validation and error handling, and real-time document processing and verification tracking via backend APIs.
Result
Processing time cut from hours to minutes, with better completion rates through optimized, responsive workflows.
React.jsREST APIsSecure FormsCompliance
01
Template
→
02
Components
→
03
CMS
→
04
Ship
/02NDA · details limited
Internal product · OPSOLUTIONS

ReactJS Starter Platform & CMS

A production-ready foundation that every new frontend project could start from.

Problem
Each new project rebuilt the same setup, components, and API layer from scratch.
Built
An internal ReactJS template with reusable UI components, CMS integration, and preconfigured REST API architecture — then mentored teams on adopting it.
Result
Project setup and delivery time reduced by ~50–70%; new projects completed in ~2 months.
React.jsCMSComponent LibraryArchitecture
01
Browse
→
02
Cart
→
03
Checkout
→
04
Order
/03NDA · details limited
Client work · E-commerce

Jardine E-commerce Platform

A large-scale e-commerce platform delivered across web and mobile.

Problem
A large e-commerce build needed consistent architecture and on-time delivery across web and mobile teams.
Built
Led 4 frontend and 3 mobile developers: owned frontend architecture, coding standards, unit testing, and sprint planning, while building core features.
Result
Product listings, checkout flows, and user interactions delivered on schedule, with improved reliability and fewer defects.
React.jsTeam LeadUnit TestingCode Reviews
01
Invite
→
02
Details
→
03
Directions
→
04
RSVP
/04Live
Personal project · Live

Race-Themed Birthday RSVP

A racing-themed invitation and RSVP web app for a first-birthday celebration.

Problem
Guests needed one place to get the event details, find the venue, and RSVP — easily, from their phones.
Built
A themed single-page app with event details, Google Maps directions, tap-to-call, and an RSVP form for attendance, guest count, and messages.
Result
Live on Vercel and shared with guests as a single link for details, directions, and RSVPs.
Next.jsTailwind CSSFormsVercel
01
Design
→
02
Animate
→
03
Optimize
→
04
Deploy
/05Live
Personal project · Live

Interactive Wedding Event App

A responsive, visually engaging event site for my own wedding.

Problem
I wanted a personal event site that felt special and loaded fast on any guest's phone.
Built
A mobile-first UI with modern animations, reusable components, and a scalable frontend structure.
Result
Live on Vercel with fast global delivery.
ReactAnimationsMobile-firstVercel
Skills

The right tools.
Not just the latest ones.

/01

Frontend

React.jsNext.jsTypeScriptJavaScript (ES6+)Tailwind CSSHTML & CSSResponsive DesignAnimations
/02

State & Data

ReduxZustandREST APIsThird-party ServicesCMS Integration
/03

Testing & Quality

JestReact Testing LibraryUnit TestingCode ReviewsPerformance OptimizationCross-browser CompatibilitySecure Data Handling
/04

Tools & Delivery

GitFigmaVercelReusable Component LibrariesFrontend Architecture
/05

Leadership

Technical LeadershipMentoringSprint PlanningCross-functional Collaboration
Education

Foundations.
Always learning.

/01

Bachelor of Science in Information Technology

Lyceum of the Philippines University – Cavite

2015 — 2019
Contact

Let's build something.
Your idea. My next great project.

Open to new opportunities, collaborations, and interesting conversations. Drop me a line, or grab my CV for the full details.

aaolegario@gmail.com
LinkedIn Facebook