In-Demand Senior web Jobs in Mascot, Nsw

Senior Engineer (Core Web)
CoStar Group —Sydney NSW
- Full-time
- Vital signs
- Computer Science
- AWS
Senior Engineer - Full Stack (React/.Net) - AI Workflows
Reapit ANZ —Sydney NSW
- Contract
- Azure
- DevOps
- Master's degree
Quick Apply
Senior Media and Communications Officer
NSW Health —Westmead NSW
- $118,821 - $140,201 a year
- Full-time
- Writing skills
- No degree
- Paediatrics
- Employee assistance program
2d
Senior Front End Developer
PowerData Group Consulting —Eveleigh NSW
- $850 - $900 a day
- 8 hour shift
- Remote
- APIs
Quick Apply
9d
AEM Lead
Infosys Singapore & Australia —Sydney NSW
- Full-time
- Hybrid work
- Azure
- Management
- DevOps
Quick Apply
Senior Software Engineer (Full Stack) – Remote
NotesEdu —Westmead NSW
- Part-time
- Remote
- Computer Science
- AWS
- Work from home
Senior Engineer (Core Web)
Domain Group —Pyrmont NSW
- On call
- Vital signs
- Computer Science
- AWS
Customer Success Trainer
Aristocrat Interactive —North Ryde NSW
- Full-time
- Microsoft Powerpoint
- Microsoft Word
- Microsoft Excel
- Annual leave
Senior Software Engineer - .NET Full Stack
Commonwealth Bank —Sydney NSW
- Full-time
- DevOps
- AWS
- APIs
DotNet Fullstack Developer
Tata Consultancy Services —Sydney NSW
- Azure
- Computer Science
- DevOps
Senior MuleSoft Developer
Shoolin Consultancy —Sydney NSW
- $94,394.98 - $150,000.00 a year
- Full-time
- Azure
- Computer Science
- Salesforce
Quick Apply
8h
Senior Software Engineer
Freelancer.com —Sydney NSW
- $160,000 - $180,000 a year
- Full-time
- Doctoral degree
- Computer Science
- Engineering
Quick Apply
Senior Software Engineer (TypeScript, React, NestJS)
Cover Genius —Sydney NSW
- Full-time
- Hybrid work
- DevOps
- AWS
- Software development
- Work from home
Senior Data Collaboration Officer
Transport For NSW —Macquarie Park NSW
- $124,810 - $139,787 a year
- Full-time
- Hybrid work
- Analytics
3d
Senior Full Stack Software Engineer
Freelancer.com —Sydney NSW
- $160,000 - $200,000 a year
- Full-time
- Doctoral degree
- Master's degree
- SQL
Quick Apply
Senior Data Analyst
Transport For NSW —Macquarie Park NSW
- $141,678 - $158,677 a year
- Full-time
- Data analysis skills
10d
Senior Backend Engineer (Agentic AI & Cloud Platforms)
Tata Consultancy Services —Sydney NSW
- Azure
- Master's degree
- APIs
Senior Web Designer
ADAPT Ventures —Sydney NSW
- Sales
- Marketing
Full-Stack Software Engineer
Freelancer.com —Sydney NSW
- $85,000 - $100,000 a year
- Full-time
- Doctoral degree
- Computer Science
- Writing skills
- Free food
Quick Apply
Global Advisory & Markets, Software Engineer, Associate, Sydney
Goldman Sachs —Sydney NSW
- Full-time
- Databases
- APIs
- Travel reimbursement
- Health insurance

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Senior Engineer (Core Web)

CoStar Group -
Sydney NSW

Apply Now

Job Details

Full-time

Qualifications

CI/CD
Vital signs
Computer Science
Software Engineering
AWS
Docker
Security
Scalability

Full Job Description

Senior Engineer (Core Web)

Job Description

Senior Software Engineer will drive high-quality software development and innovation, serving as a key driver of technical direction across engineering initiatives. This pivotal role involves architecting scalable, highly performant software systems, writing and reviewing code, and ensuring all technical solutions align with the broader engineering strategy. Leveraging deep expertise in React, TypeScript, and Next.js, the engineer will lead the development of complex features, mentor team members, and champion engineering quality standards to solve real customer problems and enhance web applications.

What you’ll do

Build high-quality, scalable, and reliable solutions, applying modern engineering best practices and contributing to continuous improvement across the technology landscape.

Demonstrate strong expertise in web performance optimisation, including Core Web Vitals (LCP, INP, CLS, and TTFB), with a focus on delivering exceptional customer experiences.

Contribute to the health, stability, and evolution of platforms by addressing technical debt, improving system performance, and influencing engineering standards through collaboration with broader technical communities.

Mentor and support junior engineers, while partnering closely with Product Managers and Designers to deliver customer-centric outcomes aligned with business goals.

Take ownership of operational excellence, including participating in on-call rotations, responding to incidents, and proactively improving system reliability, security, and maintainability.

Ideally you’ll have

Degree in Computer Science, Software Engineering, or a related discipline.

Strong expertise in modern frontend technologies, including React, JavaScript, TypeScript, and Next.js.

Experience building scalable, high-traffic web applications using modern architectural patterns such as Micro Frontends, SPA, and SSR.

Experience working with GraphQL, cloud-native technologies (AWS), containerisation (Docker), and modern CI/CD practices.

Proficiency in designing and delivering high-quality software solutions within Agile development environments.

Collaborative mindset with proven experience working across Product, Design, and Engineering teams to deliver customer-focused outcomes.

Demonstrated ability to mentor junior engineers, contribute to engineering best practices, and drive continuous improvement within development teams.

Security: Familiarity with modern Application Security Practices (OWASP) preferred

Deep understanding of web performance optimisation, including Core Web Vitals (INP, LCP, CLS, and TTFB).

What’s in it for you

Working at CoStar Group means you'll enjoy a culture of collaboration and innovation that attracts the best and brightest across a broad range of disciplines. We offer you generous compensation and performance-based incentives. As well as having an outstanding working environment, other perks include extra days of annual leave, leadership development programs, LinkedIn Learning, Perkbox discounts and much more!

At CoStar, we recognise the positive value of diversity and promote equality. We aim at all times to recruit the person who is most suited to the job and welcome applications from people of all backgrounds including but not limited to; people of all genders, of all ages, sexual orientations, ethnicities, nationalities, religions and beliefs.

About Domain (part of the CoStar Group)

Domain is a leading property technology and services marketplace that is home to one of the largest portfolios of property brands in Australia, including the Domain, Allhomes and Commercial Real Estate (CRE) platforms. In 2025, Domain became part of CoStar Group - a global leader in commercial real estate information, analytics, online marketplaces and 3D digital twin technology. We are dedicated to digitising the world’s real estate, empowering all people to discover properties, insights, and connections that improve their businesses and lives.

Equity, Diversity & Inclusion

Domain is enthusiastically and unapologetically committed to fostering an equitable, inclusive work culture which reflects our customers and communities. We are proactively looking for candidates from all lived experiences, including people with disability, and people of all ages, ethnicities, cultures (including Aboriginal and Torres Strait Islander Peoples), faiths, sexual orientations, and gender identities (including trans and non-binary people).

We are committed to providing an equitable recruitment process for people with disability. If you require adjustments during the process we’re here to support. If you wish to receive this job advertisement in an accessible format, or have a confidential chat about workplace adjustments, please contact our Equity, Diversity and Inclusion team at [email protected] or leave a message on 1300 858 356 and we will get back to you.

What’s Next?

We’ll give your application the thoughtful attention it deserves and get back to you as soon as possible. If there’s a match, one of our recruitment consultants will reach out—so keep your phone handy! We’re genuinely excited about the chance to work together and make a meaningful impact.

CoStar Group is an Equal Employment Opportunity Employer; we maintain a drug-free workplace and perform pre-employment substance abuse testing

Apply Now

Refine Your Search

senior web jobs in mascot, nsw

Senior Engineer (Core Web)

Senior Engineer - Full Stack (React/.Net) - AI Workflows

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Senior Front End Developer

AEM Lead

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Global Advisory & Markets, Software Engineer, Associate, Sydney

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