Senior Integrations Engineer - API & AI Platform

Manifest Creative Club; Sydney; On-site; AUD 140,000 - 190,000; Full time

Benefits offered by this job

Joint ownership

Autonomy

Best software/tools

Learning and growth

Job summary

Humanitix is seeking a Senior Software Engineer, Integrations to shape how our platform connects with external systems. You’ll extend our public API, grow MCP integrations, and partner with Google, HubSpot, and distribution platforms to broaden our ecosystem.

Join a mission-driven team that values curiosity, design excellence, and practical documentation, where you’ll own end-to-end integration challenges and help us deliver robust, scalable connections for AI-enabled experiences.

Qualifications

• Be ethically aligned and genuinely inspired by our mission.
• A good sense of humour and warm heart - your colleagues are awesome human beings who bring their personality into the office.
• A great work ethic and the confidence to escalates problems and ask your colleagues for help.
• A good level of experience in our stack (JavaScript/TypeScript, Node, React, AWS, MongoDB).
• Experience designing or consuming APIs at scale, and an interest in emerging standards like MCP and AI-agent tooling.
• Experience integrating with third-party platforms/partners (payments, auth, data sync, webhooks).
• Expert in documentation and testing — integration work lives or dies on clear contracts.
• Understanding of design principles behind a scalable, secure application.
• A curiosity and a thirst for learning.
• A keen eye for design and the desire to add the extra 1% that make good integrations great.

Responsibilities

• Extending and hardening our public API so hosts, developers, and third parties can build on top of Humanitix reliably.
• Building and maintaining MCP integrations, enabling AI assistants and agents to interact with Humanitix data and workflows.
• Growing our footprint with external partners such as Google, HubSpot, and reseller/distribution platforms (e.g. Viator/TripAdvisor via OCTO) — covering listings, sync, payments, and reconciliation.
• Designing integration patterns that are secure, well-documented, and easy for both internal teams and external partners to adopt.
• Owning problems end-to-end: from API design and data sync through to monitoring, error handling, and partner support.

Skills

JavaScript/TypeScript

Node.js

React

AWS

MongoDB

APIs at scale

Documentation

Tools

MCP (Model Context Protocol)

Job description

Humanitix is seeking a Senior Software Engineer, Integrations to shape how our platform connects with external systems. You’ll extend our public API, grow MCP integrations, and partner with Google, HubSpot, and distribution platforms to broaden our ecosystem.

Join a mission-driven team that values curiosity, design excellence, and practical documentation, where you’ll own end-to-end integration challenges and help us deliver robust, scalable connections for AI-enabled experiences.