API Developer

• *This role will be considered in Melbourne CBD, Brisbane, or Canberra*
• 12 months with 2*12 month extension
• Australian citizenship with Baseline clearance mandatory

About The Role

As an API Developer, in our Enterprise Solution and Technology business area, you'll be working within the delivery team, contributing towards the build work across various whole-of-government initiatives and other projects. You will collaborate across other program leads. A requirement for this role is the ability to be flexible within the working environment, adapting to shifting priorities within the branch, work will vary depending on executive priorities and directions.

Core technical skills (must-have)

• Languages: Proficiency in at least one: Node.js/TypeScript/ReactJS or C# (.NET).
• API standards: OpenAPI 3.x (Swagger), HTTP/1.1 & HTTP/2 semantics, error models, filtering/sorting conventions, ETag/conditional requests.
• AuthN/AuthZ: OAuth 2.1, OIDC, JWT, scopes/claims, token lifecycles, mTLS; understanding of common pitfalls (token leakage, replay, CSRF).
• Data & caching: SQL (PostgreSQL/MySQL) and one NoSQL (MongoDB/DynamoDB); Redis for caching/rate limiting.
• Messaging (at least one): Kafka, Kinesis, Pub/Sub, SQS/RabbitMQ; async patterns and exactly/at-least-once semantics.
• CI/CD: GitHub Actions/GitLab CI/Jenkins; trunk-based or short-lived branches; automated tests and contract tests in the pipeline.
• Containers & orchestration: Docker; Kubernetes fundamentals (Deployments, Services, Ingress, ConfigMap/Secret, HPA).
• IaC: Terraform (modules, workspaces, state mgmt), policy checks.
• Observability: OpenTelemetry traces/metrics/logs; PromQL basics; log correlation and alert tuning to reduce noise.
• API gateways (one or more): Kong, Apigee, AWS API Gateway, Azure APIM (policies, rate plans, mutual TLS, custom auth).
• Performance & resilience: Load testing with k6/JMeter, connection pooling, N+1 detection, bulkheads, circuit breakers (e.g., Resilience4j/Envoy).