Senior Software Engineer - AI (Sydney, Australia) na Singtel: Mobile, Fibre Broadband and TV services provider

Optus is an Australian telecommunications company, delivering more than 11 million services to our customers every day across mobile, broadband and digital solutions.

Join our newly formed AI Engineering tribe and play a pivotal role in shaping the future of AI-powered integration platforms. As a Senior Software Engineer, you’ll lead the evolution of our integration architecture—designing secure, scalable APIs that connect core services with cutting-edge AI capabilities. You’ll influence architectural direction, technology choices (including Gen AI, vector databases, and frameworks like SpringAI, LangChain, CrewAI), and API standards that underpin our customer experiences. This is a unique opportunity to make a direct impact on how we build and scale AI-enabled services across our ecosystem.

What you’ll do

• Design and implement scalable, secure APIs that integrate with AI services and LLMs (OpenAI, Anthropic, etc.)
• Lead development using Spring Boot 3.x, WebFlux, and Apigee, driving best practices in performance and security
• Collaborate with AI engineers to build endpoints for model inferencing, vector search, and agentic workflows
• Apply secure API patterns (OAuth2, JWT) to protect sensitive data and support AI model operations
• Drive observability and reliability across services, ensuring smooth and resilient user experiences
• Translate business goals into technical designs in partnership with Product Owners and stakeholders
• Lead architecture reviews and foster knowledge sharing around AI integration and tools like GitHub Copilot
• Align with Platform Engineering and MLOps to enable automated deployment of AI-enabled services

Core Skills

• Deep expertise in Java and the Spring Framework ecosystem
• Advanced knowledge of Spring Boot 3.x, Spring Security, and WebFlux
• Regular use of AI coding assistants like GitHub Copilot
• Strong experience with Apigee and reactive programming patterns
• Proven ability to design and secure APIs using OAuth2, JWT, and API key management
• Proficiency with AWS, Azure, or GCP cloud services
• Hands-on experience integrating LLM APIs (OpenAI, Anthropic) and orchestrating prompts or agentic workflows
• Familiarity with RAG, vector search, or embedding-based retrieval

Bonus Skills

• Experience with real-time data processing and streaming architectures
• Hosting model endpoints using platforms like AWS Bedrock
• Familiarity with LangChain, CrewAI, or similar LLM orchestration frameworks
• Graph API implementation
• Experience with Kafka or similar message brokers

The good stuff…

• Competitive remuneration and employee discounts. Make life easier (and more affordable) with $80 monthly credit and 25% off Optus products and unique shopping discounts with our retail partners.
• Flexible working arrangements with opportunities to work three days in the office, two days remote or home.
• Vibrant and collaborative office campus that includes cafes, convenience store, chill out zones, GP, post office, gym and on-site childcare centre.
• Competitive leave policies, including additional 'Connected’ days to focus on culture, family, health, community, or whatever’s important to you.

• We support growing families with inclusive, carer-neutral paid Parental Leave of up to 16 weeks.

• Direct your own development and build future-ready skills with Optus U’s industry-focused micro-credentials, developed with La Trobe and Macquarie Universities.

• Build meaningful connections through employee-led networks and diversity initiatives including Culture Connect, Elevate Women, Disability Network and Express Yourself (LGBTQIA+).
• Put your wellbeing first with free access to counselling and support services, 24/7 — in-person, by phone, SMS, or video.
• Free Optus bus from Macquarie University Metro Station (every 6-8 minutes); morning and afternoon.

At Optus, we are strengthened by others and that means valuing diversity and saying ‘yes’ to embracing individual differences. We are committed to ensuring that our application process provides an equal employment opportunity to all job seekers, including individuals from diverse gender, cultural and linguistic backgrounds, individuals with a disability, individuals identifying as being part of the LGBTQIA+ community, individuals who may have served in the armed forces or who identify as Aboriginal and/or Torres Strait Islander. We also want to do our best to make our recruitment process inclusive. If you require any adjustments or accessibility support to participate fairly and equitably in the recruitment process, please email [email protected] or call 1800 309 170. We're here to help. When you contact us, please advise your preferred method of contact and we will be in touch within 48 hours. 

For more information on Diversity, Inclusion & Belonging at Optus, please visit https://www.optus.com.au/about/inclusion-diversity

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