We are looking for a Senior Software Engineer to design, build, and operate contemporary software applications and the cloud infrastructure that supports them.

This is a hands-on senior engineering role with end-to-end ownership across application development, architecture, cloud infrastructure, and production operations.

You will work on complex and sometimes ambiguous problems, partnering with engineering, product, and data teams to shape solutions and take them from technical design through implementation, deployment, and ongoing operation.

We are looking for an engineer with strong software engineering fundamentals, sound architectural judgment, and the ability to work effectively across the full technology stack.

KeyResponsibilities

- Design,buildandevolveproduction-gradeapplicationsusingTypeScript,ReactandNode.js,withastrongfocusonquality,performanceandmaintainability
- Developscalablebackendservices,APIsandintegrationswithMongoDBandotherinternalorexternalplatforms
- Takeend-to-endownershipoftechnicalsolutionsfromrequirementsanddesignthroughimplementation,deployment,monitoringandongoingimprovement
- Translatebusinessandproductrequirementsintopragmatictechnicalsolutions,makingwell-reasoneddecisionsacrossarchitecture,APIs,dataandinfrastructure
- Diagnoseandresolveissuesacrossapplication,infrastructureanddeploymentlayers,andimplementimprovementsthatreducerecurringoperationalrisk

WhatYou'llBring

- 10+yearsofsoftwareengineeringexperience,withaproventrackrecordofoperatingatSeniorEngineerlevelanddrivingtechnicaldeliveryacrosscomplexinitiatives.




- Proven experience designing and operating applications on AWS, with deep expertise in Infrastructure as Code using Terraform to deliver secure, scalable, and maintainable cloud environments
- StrongexperiencewithPostgreSQLandotherrelationaldatabases,includingschemadesign,queryoptimisation,andperformancetuning.
- ExperiencewithMongoDBandotherNoSQL/documentdatabases,withasolidunderstandingofdatamodellingandscalabilityconsiderations.
- Deepunderstandingofsoftwarearchitecture,APIdesign,distributedsystems,anddatamodellingprinciples.
- ExperiencebuildingandoperatingmodernengineeringplatformsusingCI/CD,automatedtesting,monitoring,observability,andproductionsupportbestpractices.
- Excellentcommunicationskills,withtheabilitytoinfluencestakeholdersandclearlyexplaintechnicalconcepts,decisions,andtrade-offsacrossalllevelsoftheorganisation.

ExperienceThatWouldBeValuable

- Event-drivenorasynchronousapplicationarchitectures
- OAuth,OpenIDConnectorMicrosoftEntraID
- Media,advertising,marketingoragencytechnologyexperience

AdditionalInformation

Omnicom Media Group network is an equal opportunity employer and is committed to building a diverse and inclusive workplace. We encourage Aboriginal, Torres Strait Islander and people of all backgrounds to apply. We do not discriminate on the basis of race, religion, national origin, gender identity or expression, sexual orientation, age, or marital, veteran, or disability status. All your information will be kept confidential according to EEO guideline.

📌 Senior Software Engineer (Sydney)
🏢 Omnicom Media Group
📍 Sydney