Blockchain Engineer

About Us
Immutable is a global technology company, powering the leading platform for building games on Ethereum. We are on a mission to build the future of gaming by redefining how games are played and discovered. Founded in 2018, Immutable is one of the fastest Australian companies to hit unicorn status, having raised more than AUD $300M+ and a valuation of AUD $3.5 billion.

Currently, the Immutable Group consists of the Immutable Platform, the leading platform for building games on Ethereum powering successful games like RavenQuest and Immortal Rising 2, and Immutable Games, a global leader in web3 game development and publishing with leading titles Gods Unchained and Guild of Guardians.

Our ambition is to make digital worlds real; we have incredible global growth plans as the fastest growing gaming chain in 2024 with 250+ games signed, more than in all previous years combined.

About The Role
As a
Blockchain Engineer
at Immutable, you'll work at the cutting edge of Ethereum scaling and rollup technology. You'll take ownership of protocol-level features, designing and shipping core blockchain infrastructure that supports high transaction volumes while keeping costs low and latency minimal. You'll collaborate with world-class engineers to push the boundaries of Layer 2 scalability, interoperability, and performance. Contributing directly to Immutable's mission of powering the next generation of Web3 games.This role is perfect for someone who thrives in an environment where engineers influence architecture, roadmap, and technology choices, and where deep technical learning is actively encouraged.

You'll Be Empowered To

• Design, implement, and optimise blockchain protocol components including chain enhancements and cross-rollup bridges.
• Own architectural decisions and set engineering best practices for blockchain development.
• Ensure security, reliability, and performance of protocol changes under high transaction loads.
• Experiment with emerging blockchain technologies such as ZKPs, cross-rollup messaging, and new Ethereum primitives.
• Collaborate across teams to integrate innovations into the Immutable product roadmap.

We'd Love You To Bring

• Hands-on Ethereum blockchain development experience (smart contracts + protocol-level).
• Proficiency in Solidity and at least one backend language (Golang preferred).
• Strong understanding of distributed systems or large-scale microservices.
• Experience integrating with Ethereum APIs and tooling (JSON-RPC, ).
• Clear communication skills to explain complex blockchain concepts to both technical and non-technical audiences.
• 5+ years of relevant engineering experience.
• Experience with Layer 2 scaling solutions.
• Deep knowledge of Ethereum Virtual Machine (EVM) internals.
• Familiarity with blockchain bridges or cross-chain communication protocols.
• Contributions to open-source blockchain projects.
• Strong cryptography fundamentals.

Why You'll Love It Here

• End-to-end impact: from low-level EVM opcode optimisation to user-facing performance gains.
• Ownership and influence: shape architecture and core technology decisions.
• Cutting-edge work: experiment with emerging blockchain primitives and scaling solutions.
• Continuous learning: deep technical challenges, Ethereum ecosystem thought leadership, and innovation-friendly culture.
• Collaborative environment: engineers work side-by-side with product, design, and leadership to deliver meaningful features.

We are proud of the benefits that we offer for all of our employees globally. Here is a snapshot:
Attracting The Best Global Talent
We commit to paying globally competitive salaries and contributions & we share our products' success through Employee Stock Options. We also support our US Employees with Medical and 401K Insurance

Our flexible working model blends the best of both worlds: Sydney-based employees enjoy three days a week in our vibrant head office, while remote team members can work from home or utilise access to global office hubs via a WeWork All-Access pass

We offer USD $500 WFH allowance to set up your home office and USD $600 per annum to put toward your internet and phone usage.

Levelling up your growth
We offer up to USD $1,350 per annum for any classes, courses or events to support your growth and development

Enjoy access to free online courses via Udemy

Helping you thrive
Enjoy USD $800 per year to put toward your health and wellbeing

Get 24/7 access to unlimited counselling for you and your family when you need it through our EAP Service

Monthly subsidy and discounted rate with ClassPass, including a 1-year free membership to Breethe

Leave When You Need It The Most
New parents receive 12 weeks of paid leave in our gender-neutral offer. The birthing parent also gets an additional six weeks of leave for rest and recovery leading up to and after birth. We also offer Miscarriage Leave and extra leave for IVF treatments

Enjoy 2 additional paid annual leave days at the end of the year and a paid day off for your birthday

Additional Information
Immutable is committed to building and fostering an inclusive, diverse workplace. We believe in incorporating everyone's perspectives and experiences as this has been a significant driver of our success so far.

We are a 2025 Circle Back Initiative Employer – we commit to responding to every applicant.

• A note to recruitment agencies: Our internal team has this role covered, so there is no need to reach out - We don't accept unsolicited agency resumes and are not responsible for any fees related to unsolicited resumes. Thank you

Join us in shaping the future of web3 gaming