Senior Full-Stack Architect: Backend Lead & AI Integrations

Hammerjack Pty Ltd; Philippines; On-site; PHP 1,200,000 - 2,000,000; Full time

Job summary

Hammerjack Pty Ltd in the Philippines seeks a Senior Full-Stack Developer (Backend Leaning Lead Builder) to own backend architecture, system design, and data modeling while contributing across the stack to rebuild and scale a modern B2B/B2B2C platform for sports mental performance.

The role emphasizes building robust RESTful APIs, RBAC, AI integrations with Claude/OAI, and end-to-end ownership from backend to frontend integration, ensuring performance and security as the product scales.

Qualifications

• 4+ years of senior software engineering experience.
• Strong backend and system design mindset.
• Full-stack capabilities across React, TS, Node.js.
• Experience with AI API integrations (OpenAI, Anthropic).
• Proven experience shipping production-grade apps.
• Excellent English communication.

Responsibilities

• Architect backend systems and platform structure.
• Design database schemas, relationships, and migrations.
• Build, maintain, and optimize RESTful APIs.
• Implement authentication and RBAC systems.
• Handle integrations, background jobs, and webhooks.
• Manage file/media storage (images, audio, video).
• Integrate AI APIs into workflows.
• Ensure system scalability, performance, and security.
• Support frontend and mobile integration.

Skills

Senior software engineer

Backend design mindset

Full-stack development

React & React Native

TypeScript

Node.js

RESTful APIs

PostgreSQL design

AI integrations

Claude Code

English communication

Tools

OpenAI API

Anthropic Claude

Job description

Hammerjack Pty Ltd in the Philippines seeks a Senior Full-Stack Developer (Backend Leaning Lead Builder) to own backend architecture, system design, and data modeling while contributing across the stack to rebuild and scale a modern B2B/B2B2C platform for sports mental performance.

The role emphasizes building robust RESTful APIs, RBAC, AI integrations with Claude/OAI, and end-to-end ownership from backend to frontend integration, ensuring performance and security as the product scales.