Senior Backend Engineer — Python APIs & AI-Driven Platform

Airbus Ventures; Sydney; Hybrid; AUD 140,000 - 190,000; Full time

Benefits offered by this job

Equity potential

Flexible work

Job summary

Q-CTRL is seeking a Senior Back-end Software Engineer to own and evolve the Python APIs and microservices behind our quantum software platforms. You will design, implement and test REST and GraphQL interfaces, leveraging AI-assisted workflows to accelerate development while ensuring high quality, security and reliability across distributed systems.

You will mentor teammates, review code with care, and help shape how we apply AI tooling in a fast-paced scaleup environment.

Qualifications

• 5+ years of professional software development, including 3+ years in Python.
• Experience building web APIs (REST, GraphQL) with Django or FastAPI.
• Fluent with AI tools in development workflow, with good judgement about when to trust, verify or override them.
• Experience with OIDC/OAuth2 (Keycloak).
• Sound testing habits (BDD, automated tests, CI/CD).
• Clear communication and the ability to communicate with different internal audiences.
• Comfort moving fast with thought and empathy in a scaleup environment.
• A degree in computer science or equivalent practical experience.

Responsibilities

• Designing, building, testing and documenting Python APIs (REST and GraphQL) and the microservices and client packages behind our product features.
• Turning product intent into working software, using stories (AS A, WHEN, THEN) from the Product team as shared, testable specs.
• Using AI coding assistants and agentic workflows daily for implementation, test generation, refactoring and documentation, while owning the quality of what ships.
• Helping shape how the team uses AI: evaluating tools, writing prompts and guardrails, and sharing what works.
• Reviewing pull requests with rigour and kindness, including AI-generated code.
• Improving reliability, performance and security of our distributed systems.
• Mentoring teammates and sharing knowledge openly.

Skills

Python

REST APIs

GraphQL

Django

FastAPI

OIDC/OAuth2

Testing (BDD, CI/CD)

Communication

Scaleup experience

Education

Bachelor's degree in Computer Science

Tools

Keycloak

Ray

RabbitMQ

Job description

Q-CTRL is seeking a Senior Back-end Software Engineer to own and evolve the Python APIs and microservices behind our quantum software platforms. You will design, implement and test REST and GraphQL interfaces, leveraging AI-assisted workflows to accelerate development while ensuring high quality, security and reliability across distributed systems.

You will mentor teammates, review code with care, and help shape how we apply AI tooling in a fast-paced scaleup environment.