As a Blockchain Engineer, you will design and optimize blockchain protocols, ensure security and performance, and contribute to Layer 2 solutions.
About Us 🚀
Immutable is the world’s fastest-growing game platform, built to power the next generation of games. We aim to drive the next evolution of gaming, combining performance, digital ownership and cutting-edge technology to help games grow and succeed. At the intersection of AI-driven analytics, high-performance growth tools, and seamless digital ownership, our technology helps studios attract, engage, and scale player communities across both Web2 and Web3.
Founded in 2018, Immutable is one of Australia’s fastest companies to reach unicorn status, raising more than AUD $400M+ with a valuation of AUD $3.5B. Today, more than 700 games are building on Immutable, and industry leaders like Ubisoft have chosen us as their partner for the future of gaming.
Over 6 million players use Immutable Passport, our unified identity enabling frictionless cross-game experiences, and our Immutable Audience platform has become the fastest-growing SaaS product line in our history. We're scaling rapidly, backed by a global team of creators, engineers, and gamers united by one mission: to build the most valuable growth layer in gaming and redefine how games launch, scale, and succeed. 🚀
About The Role 🤔
As a Protocol 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, ethers.js).
- 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.
*Due to the holiday period, we will not be screening incoming applications before January 5th - we will contact candidates after that date. Thanks for understanding and happy holidays!
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 base salaries and contributions to a long-term fund
📊 Sharing our products' success through Employee Stock Options ESOP
🌟 Our flexible working model blends the best of both worlds: Sydney-based employees enjoy hybrid 3 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
🥘 Lunch is ordered fresh every day in our friendly office in Sydney CBD
🎉 Quarterly End of Cycle Celebration Awards and Dinner
💻 USD $500 WFH allowance to set up your home office
☎️ USD $600 per annum to put toward your internet and phone usage.
🥳 USD $75 per quarter for remote employees to celebrate with local team members
⛑️ We also support our US Employees with Medical and 401K Insurance
🚘 Our Australian Employees can avail of Novated Leasing, save money by paying for your car using pre & post-tax dollars
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 6 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
🎂 Birthday you get a paid day off
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 2026 Circle Back Initiative Employer. This means a human reviews every application and 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 gaming!
Top Skills
Ethereum
Ethers.Js
Go
Json-Rpc
Solidity
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