Senior Software Engineer - GoLang

Singtel Group; Sydney; On-site; AUD 140,000 - 190,000; Full time

Benefits offered by this job

Employee discounts

Flexible work arrangements

On-site office campus

Parental leave

Diversity networks and inclusion

Wellbeing support

Commute via free Optus bus

Job summary

Optus is seeking a Senior Software Engineer specialized in GoLang to design, build, and support high-performance integration services and enterprise applications underpinning OSS platforms. The role emphasizes ownership, architecture influence, and hands-on coding across the full SDLC.

You will lead technical discussions, mentor peers, and collaborate with architects, product owners, and cross-functional teams to deliver robust solutions that address complex business challenges.

Qualifications

• 7-8 years of commercial GoLang experience, production-grade delivery.
• Strong GoLang API and microservices experience.
• Experience with REST, Kafka, CI/CD, GitLab, and relational DBs.

Responsibilities

• Design, build, deploy, and support enterprise GoLang applications and integration services.
• Develop scalable APIs, microservices, and event-driven solutions.
• Lead design discussions, code reviews, and mentor engineers.

Skills

GoLang development

API design

Microservices

Concurrency

Performance optimisation

Testing

Code quality

Stakeholder engagement

Tools

GoLang

REST APIs

Kafka

CI/CD

GitLab

PostgreSQL

Oracle

Job description

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Optus is an Australian telecommunications company, delivering more than 11 million services to our customers every day across mobile, broadband and digital solutions.

As a Senior Software Engineer - GoLang, you will play a critical role in designing, building, and supporting high-performance integration services and enterprise applications that underpin key OSS platforms across Optus. This role is ideal for a highly skilled GoLang engineer who has hands-on experience delivering production-grade applications end-to-end. You will be a technical leader within the team, driving engineering excellence, mentoring peers, and influencing architectural decisions while remaining deeply involved in coding, solution design, and delivery.

What You’ll Do

Design, develop, deploy, and support enterprise-grade GoLang applications and integration services across the full software development lifecycle.

Build scalable APIs, microservices, and event-driven solutions using GoLang, ensuring high performance, reliability, maintainability, and security.

Lead technical design discussions, code reviews, and engineering decisions while mentoring engineers and championing modern software development best practices.

Collaborate with architects, product owners, and cross-functional engineering teams to deliver robust solutions that solve complex business and operational challenges.

What You Bring

7-8 years of strong commercial experience developing and deploying GoLang applications, with the ability to demonstrate end-to-end ownership of solutions delivered into production environments.

Deep expertise in GoLang development, including APIs, microservices, concurrent processing, design patterns, performance optimisation, testing, and code quality practices.

Experience working with REST APIs, Kafka, event-driven architectures, CI/CD pipelines, GitLab, and relational databases such as PostgreSQL or Oracle.

Excellent problem-solving and stakeholder engagement skills, with the ability to mentor others, influence technical direction, and thrive in a complex enterprise technology environment.

The good stuff….

• Competitive remuneration and employee discounts. Make life easier (and more affordable) with $80 monthly credit and 25% off Optus products and unique shopping discounts with our retail partners.
• Flexible working arrangements with opportunities to work three days in the office, two days remote or home.
• Vibrant and collaborative office campus that includes cafes, convenience store, chill out zones, GP, post office, gym and on-site childcare centre.
• Competitive leave policies, including additional 'Connected’ days to focus on culture, family, health, community, or whatever’s important to you.
• We support growing families with inclusive, carer-neutral paid Parental Leave of up to 16 weeks.
• Build meaningful connections through employee-led networks and diversity initiatives including Culture Connect, Elevate Women, Disability Network and Express Yourself (LGBTQIA+).
• Put your wellbeing first with free access to counselling and support services, 24/7 — in-person, by phone, SMS, or video.
• Free Optus bus from Macquarie University Metro Station (every 6-8 minutes); morning and afternoon.

At Optus, we are strengthened by others and that means valuing diversity and saying ‘yes’ to embracing individual differences. We are committed to ensuring that our application process provides an equal employment opportunity to all job seekers, including individuals from diverse gender, cultural and linguistic backgrounds, individuals with a disability, individuals identifying as being part of the LGBTQIA+ community, individuals who may have served in the armed forces or who identify as Aboriginal and/or Torres Strait Islander. We also want to do our best to make our recruitment process inclusive. If you require any adjustments or accessibility support to participate fairly and equitably in the recruitment process, please email [e-mail] or call 1800 309 170.