Jastine Formentera

JastineFormentera

Full-Stack Software Engineer

About

A full-stack software engineer with 4+ years of experience building scalable web and mobile applications using React, React Native, Expo, TypeScript, Node.js, and Next.js. I deliver production-ready applications, enterprise platforms, REST APIs, authentication flows, CI/CD pipelines, cloud deployments, and backend integrations while using AI-assisted development tools to accelerate planning, implementation, debugging, testing, and delivery.

My Resume

Career Timeline

Professional Experience

Experience

May 2025 - Present

Software Engineer

Fulcrum Solutions

Build web and mobile products for startups and businesses across StepCast, ForSure, and GoGira. Work spans Expo/React Native apps, Next.js web surfaces, NestJS APIs, authentication, type-safe integrations, EAS builds, TestFlight setup, GitHub Actions automation, QA support, and production-ready delivery.

Jul 2024 - Apr 2025

Software Engineer

MDI Novare / Sun Life

Developed and maintained features for Sun Life's enterprise website/portal, primarily focusing on the Generic Web Forms module using React, TypeScript, Node.js, TanStack Query, Vite, Zustand, and Jest. Built and maintained 100+ reusable web forms and components supporting insurance policy, claims, investment, and mutual fund workflows, including servicing and change request flows. Developed BFF services and frontend API integrations to deliver scalable, maintainable, and testable enterprise features.

Apr 2024 - Jun 2024

Part-Time React Native Engineer

Codebility

Developed Applete from Figma designs using Expo, React Navigation, Firebase, Zustand, and Axios. Implemented mobile screens, navigation flows, API integrations, and app state management to support a polished user experience.

Mar 2024 - Jun 2024

React Native Engineer

SMENation Philippines

Migrated the HAT application from Ionic to React Native with Expo, React Query, and WatermelonDB. Rebuilt core mobile workflows, improved local data handling, and supported a smoother transition to the new app architecture.

Jan 2023 - Jan 2024

React Native Developer

Luna Securities Philippines

Developed and maintained the Luna stock trading mobile application for Android and iOS. Worked on production mobile features, platform stability, API integrations, and release support for a financial technology product.

Sep 2021 - Oct 2022

Frontend Developer (React)

TR Digital Services Philippines

Built scalable admin portals using React, TypeScript, Redux, and Sass. Created reusable UI components, implemented dashboard workflows, and collaborated with backend teams to connect interfaces with business data.

Apr 2020 - Aug 2021

Freelance Web & Mobile Developer

Freelance

Developed websites and mobile applications for student thesis projects. Handled requirements, UI implementation, database setup, and end-to-end delivery for small client and academic systems.

Works

Projects

My Project

StepCast
Latest Project

StepCast

StepCast is an AI-assisted guide platform for creating and sharing interactive product manuals. As the lead mobile developer, I built the Expo/React Native consumer app for browsing guides, opening QR/link-based flows, and supporting voice-guided playback. I also handled EAS builds, TestFlight, App Store Connect setup, GitHub Actions automation, and supported Next.js creator/admin workflows.

ForSure
Recent Project

ForSure

ForSure is a healthcare and insurance intelligence platform with web, admin, and mobile apps backed by a secure NestJS API and AWS infrastructure. As the mobile developer, I built and maintained the React Native/Expo app, implemented user-facing features, integrated APIs and authentication flows, handled iOS/Android builds, TestFlights, and supported QA and over-the-air releases.

GoGira
Recent Project

GoGira

GoGira is an education marketplace and management platform built with Next.js, React, TypeScript, Tailwind CSS, React Query, Zustand, React Hook Form, Zod, NestJS, and shared packages. As a full-stack developer, I built and maintained workflows across admin, school, partner, students, and affiliate portals, including backend APIs, authentication, business logic, validation, type-safe contracts, integrations, and reporting/export features

Sun Life Advisor Home Office
Recent Project

Sun Life – Advisor Home Office

Supported feature implementation and collaborated with the UI/UX team to deliver consistent designs across web and mobile. I developed front-end solutions within a microfrontend architecture, ensured cross-platform compatibility, assisted teammates with coding questions, and contributed to deployments.

LUNA Securities
Jan 2023 - Jan 2024

LUNA Securities

LUNA Securities is a stock trading platform for Android and iOS. As a React Native developer, I helped maintain the production mobile app, build user-facing features, integrate APIs, improve platform stability, and support app releases for a financial technology product.

Admin Panel
October 2022

Admin Panel

An admin portal project from my Frontend Developer role at TR Digital Services. I built dashboard workflows, reusable React components, and connected UI screens to business data using TypeScript, Redux Toolkit, Sass, and Next.js.

Onion And Garlic Application
College Project

Onion And Garlic Application

Our college project for a mobile food delivery app concept, developed with React Native CLI for iOS and Firebase for backend services.

Contact

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Contact

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