Mid to Sr. Frontend Developer

Penbrothers

17d

About The Position

Penbrothers is an HR and remote talent management partner that connects Filipino talent with global opportunities. Its client provides an operations platform for security, alarm, and fire service companies. The platform works with SedonaOffice and offers dispatch and scheduling, a technician mobile app, inventory, fleet management, a customer portal, and AI-assisted technician recommendations. As a Frontend Developer, you will join the development team to ship features, build and strengthen integrations, and maintain a production system with thousands of daily sync runs. You will work in a small team serving live customers, with work reaching users within days.

Requirements

3 to 5 years of experience building production web applications.
Proficiency with TypeScript and React.
Experience with PostgreSQL, including schema design, SQL, and row-level security concepts.
Hands-on experience integrating REST APIs, including authentication (OAuth, API keys, JWT), webhooks, pagination, rate limits, retries, and idempotency.
At least one shipped feature built on a large language model API; Anthropic Claude is preferred.
Experience with Git, pull requests, and working in a codebase started by someone else.

Nice To Haves

Experience with Supabase (Postgres, Auth, Edge Functions, Storage) and Vercel.
UI/UX design skills, including Figma, Tailwind, component libraries, accessibility, and mobile-first layouts.
Mobile experience with Capacitor, React Native, or native Android/iOS.
Experience with Twilio, RingCentral, ADP, Verizon Connect, Google Maps, or payment processors.
Background in field service, construction, or security industry software.
Experience using AI coding tools such as Claude Code responsibly in a production codebase.

Responsibilities

Build features across the stack using React, TypeScript, Postgres, and serverless functions.
Build and maintain integrations with third-party accounting and ERP, payroll, GPS and telematics, telephony, SMS, payments, and mapping APIs.
Extend AI-assisted features using the Anthropic Claude API, including prompt design, tool use, and testing outputs for accuracy.
Improve the user interface for dispatchers, office staff, and field technicians on desktop and mobile.
Investigate synchronization issues and vendor API defects, document findings, and write clear notes for non-technical readers.
Write and follow database migrations, row-level security policies, and tests that protect customer data.