Senior Systems-Minded TypeScript Engineer, O(1) Labs
Blockchain technology company
Open for applications
Blockchain technology company
21-100 employees
Open for applications
21-100 employees
Company mission
To build a private and secure way to access Web 3.0.
Role
Who you are
- Seasoned TypeScript engineer who thinks in types first and enjoys simple yet powerful TypeScript and JavaScript APIs
- Systems-oriented - comfortable jumping between browser quirks, Node internals, and Rust lifetimes to find bugs and improvements
- WASM-savvy – have shipped Rust-to-WASM modules (or similar) and understand how to keep the glue code lean and reliable
- Concurrency fluent – know when to spin up a Web Worker, how to share memory, and how to dodge race conditions
- Mentor at heart – you enjoy simplifying complex ideas and watching others level up
Desirable
- Hands-on Rust or functional-programming experience
- Experience with diving into perf tools and improving performance
- Prior work on SDKs, compilers, interpreters, or other developer tooling
- Public footprint - open-source projects, technical blogs, conference talks
What the job involves
- You’ll sit at the heart of our SDK team, owning the low-level layers where JavaScript, WASM, and OCaml shake hands
- Your mission is to make zkApps feel like normal TypeScript while hiding the gnarly parts of FFI, workers, and cryptographic proof systems
- Build & maintain o1js - extend the TypeScript API, refine Rust and WASM bindings, and keep both Node and browser targets up to date
- Design resilient boundaries – shape data layouts, memory ownership, and call conventions across JS <-> WASM <-> Rust
- Level-up concurrency - architect reliable concurrent (Web) Worker and Rayon pipelines improve user experience, performance and reliability
- Streamline developer experience - craft build pipelines, tooling, and observability hooks so contributors spot bottlenecks before users do
- Ship performance wins – profile, benchmark, and optimise our product
- Mentor & unblock – review PRs with kindness, write clear design docs, and turn tricky concepts into learning moments for the team and community
Our take
Blockchain technology is an essential part of Web 3.0 infrastructure, but it is currently limited by problems of scalability. The constantly growing size of any blockchain's ledger requires expensive node infrastructure, which poses technical problems as well as undercutting Web 3.0's promise of decentralisation.
0(1) Labs, in response to this, incubated the Mina Protocol, which is a lightweight blockchain that can scale to any size, while remaining small enough for cell phones to act as nodes. This has since grown into a thriving ecosystem of Zero-Knowledge (ZK) developers (drawn in both by the promise of the technology, and by grants provided through token sales) while 0(1) Labs continues to work on several other ZK projects.
Despite crypto and blockchain spaces experiencing some troubles of late, O(1)'s infrastructure has been shown to work, which means it can continue to drive acceptance of ZK products into the mainstream. With strong funding at its back, it can be expected that O(1) Labs will continue investing in engineering and product development as it pursues its goal of bringing Web 3.0 to the general public.
Kirsty
Company Specialist at Welcome to the Jungle
Company
Funding (last 2 of 3 rounds)
Oct 2020
$10.9m
EARLY VC
Apr 2019
$15m
SERIES A
Total funding: $28.9m
Company benefits
- Employee governance
- Remote Work
- Bi-Annual Company Offsites
- Learning, Development, and Work-Life Balance
Company HQ
Rincon Hill, San Francisco, CA
Leadership
Brandon Kase
(CEO)Brandon joined O(1) Labs in 2018 as a Protocol Engineer. Prior to this, they were an iOS Core Experience Engineer at Pinterest and a Software Engineer at Highlight.
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