Senior Software Engineer

*looking for someone to join us in January 2026*

Who We Are
E1, (formerly known as EstimateOne) is a SaaS tender management platform connecting commercial builders with subcontractors and suppliers. Proudly named one of AFR's Best Places to Work in 2025, we're the market leader in Australia and New Zealand, and are now expanding our platform to the UK.

Our scaleup vibe keeps things lively. We've come a long way in 15 years, and seeing what we've achieved in that time, gets us pretty excited for the next 15. We're passionate about setting clear, fair expectations and delivering results, with a genuine commitment to wellness and happiness that you'll truly experience.

We've been recognised twice on the AFR Best Place to Work list, so we care a lot about making sure we're a place people want to work.

About The Role
We're looking for a Senior Engineer to join us, focussing on business systems work (AI chat bot, salesforce, financial systems) and integrations. You'll work closely with our Prism team who owns our subscriptions and billing platform, however you will be the sole engineer working on business systems.

As a Senior Software Engineer in this team, you will:

• Be part of a team that owns its products & services end-to-end - from solution design and development through to deployment and monitoring
• Have experience across the full stack, but be mostly working in the backend and integration space
• Be working in a mix of collaborative pair programming as well as solo development work
• Be willing to contribute your ideas and experience to continually improve our products and team

What tech do we play with?

• We build in: Nodejs, React, , Typescript, PHP, Symfony, REST, GraphQL
• We like the cloud: AWS, Lambda, Fargate, S3, SNS, SQS etc
• And control it with: Terraform and Buildkite
• Store things in: Aurora MySQL, DynamoDB
• Index searches using: Elastic Search, OpenSearch
• We practice: DevOps, CI/CD, DDD, TDD, pairing and mobbing

About You

• You have a proven track record across the full stack with some of the technologies we work with
• You have experience working in an agile environment and contribute to rituals such as the planning of work and the continuous improvement of team processes
• You leverage AI in your day to day work
• You're able to work in an autonomous, self-directed team, and working solo at times
• You are humble, hungry and smart
• You're comfortable in ambiguity and working on a range of systems work
• You're a team player and want the business to succeed
• You align with our E1 values - Forthright & Frank, Authentic Ambition, Enabled Expertise and Cranes Before Code - check out our careers page to learn more

The ability to champion our company values matters to us; we care about our team and you'll be joining a group of people who want each other to be happy and successful. If you're a motivated self-starter and collaborative person, we need you in our team.

To learn more about our values, check out our Nuts & Bolts (beware, it's huge):

Perks
There's more to working at E1 than just creating game changing technology for the construction industry. We know that to reach the lofty goals we set ourselves we need to look after our team, our shareholders and the industry we serve. These are just a few of the things we offer:

• You can choose where you work - from the office, from home, or a mix of both This team has a remote-first approach but aim to come into the office once a fortnight
• If you need part-time arrangements let us know when you apply and we'll see if we can make it work for you
• You'll get a budget each year to put towards your professional development
• You'll get $500 each year to design your own WFH set up
• You'll get 5 days entrepreneurial leave per year, to work on your side projects and make them come to life
• Paid Parental leave (16 week primary carer, 6 weeks secondary carer)
• Volunteer leave
• You'll get access to 3 free & anonymous therapy sessions each year
• We partake in business wide activities twice per quarter (think escape rooms, drawing classes, games afternoons, online trivia)
• We also match non-profit donations 2:1

Salary range:
We're transparent about salary ranges at E1, and that extends externally. Our salary range for this role is $140,000-$155,000 + super (depending on experience).

Head to to find out more.

E1 is an equal opportunity employer committed to providing a work environment which embraces and values diversity and inclusion. If you have any support or access requirements, please let us know when you apply so we can make your application process as smooth as possible.

As a Circle Back Initiative Employer, we also commit to responding to every applicant.