Senior Back End Engineer

6 days ago


Council of the City of Sydney, Australia Sirius People Full time

Senior Back End Developer – Java & AWS

North Sydney | Hybrid | Full-Time, Permanent

An innovative Australian SaaS company is looking for an experienced Senior Back End Developer to help scale a high‑traffic, mission‑critical cloud platform used by operational teams nationwide. You’ll work in a lean product‑focused engineering team building secure, scalable systems with real‑world impact.

Key Responsibilities

- Design, build and deploy new back‑end features end‑to‑end

- Develop high‑performance, scalable Java‑based services

- Build and maintain secure API‑driven systems

- Contribute to cloud infrastructure and DevOps (AWS, Terraform)

- Develop reliable third‑party integrations (payments, finance, hardware, IoT)

- Collaborate with Product, UX and Engineering teams

- Produce clear technical documentation

Technical Environment

- Backend: Java (modern versions), AWS

- Infrastructure: Terraform

- Frontend exposure: React

- Integrations: Payments, accounting systems, hardware & IoT platforms

Required Experience

- 5+ years’ experience as a Back End Developer

- Strong commercial experience with Java

- Hands‑on AWS experience (S3, Lambda preferred)

- Solid SQL and database fundamentals

- Experience with Spring Security and secure system design

- Strong background building RESTful APIs

Desirable

- SaaS product experience

- OAuth2 and modern authentication

- Exposure to B2B compliance or permissions‑based platforms

- Startup or high‑growth environment experience

What’s On Offer

- High‑impact SaaS product with real operational users

- Modern cloud‑based tech stack

- Strong engineering leadership and technical ownership

- Hybrid working in North Sydney

This opportunity would be best suited for a seasoned developer who can make an immediate impact. If you feel as though you would be a great candidate for this opportunity, APPLY NOW Shortlisted candidates will be contacted and requested to conduct an initial Zoom interview. If you are missing a few of the requirements, you are still encouraged to apply.

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