Product Engineer — Tooling

Untolabs; San Francisco (CA); On-site; USD 120,000 - 180,000; Full time

Job summary

An innovative firm is seeking a Product Engineer for Developer Tooling to revolutionize the developer experience for blockchain applications. In this role, you will create essential tools like SDKs and CLIs that empower thousands of developers. Your expertise in JavaScript, TypeScript, and mobile languages will be pivotal in shaping the future of crypto applications. Join a team of experts and contribute to cutting-edge projects that will impact millions of transactions per second. This is a unique opportunity to work in a fast-paced environment where your contributions will truly matter.

Benefits

Unlimited Vacation

Comprehensive Health Coverage

Flexible Work Environment

Hardware Stipend

Annual Conference Budget

Qualifications

• 4+ years of engineering experience delivering production software.
• Strong skills in JavaScript and TypeScript with React expertise.
• Familiarity with blockchain concepts and JSON-RPC.

Responsibilities

• Design and build client SDKs for web and mobile applications.
• Develop reference wallets and authentication flows for security.
• Collaborate with engineers to expose new features through APIs.

Skills

JavaScript

TypeScript

React

React Native

Mobile Development (Swift, Kotlin, Flutter)

Blockchain Concepts

Command Line Tools

Clear Communication

Job description

About Unto Labs
Unto Labs is a team of low-level engineers pushing distributed systems to the physical limits of modern hardware. We are building the next generation of Layer 1 blockchain technology, from core consensus primitives to performance-tuned networking stacks that run on commodity servers.

About the Role
Unto Labs is hiring a Product Engineer, Developer Tooling to create the wallets, SDKs, RPCs, and CLIs that thousands of developers will rely on every day. You will own the full developer experience for our new Layer 1, shaping how teams build crypto applications in React, mobile, and beyond. If you love turning deep technical challenges into elegant products that delight engineers, this role is for you.

Responsibilities

• Design and build client SDKs for web, React, React Native, iOS, and Android that wrap our blockchain APIs and smart-contract primitives

• Develop and maintain reference wallets and authentication flows showcasing best practices for security and UX

• Own developer tooling including RPC endpoints, CLI utilities, and code-gen pipelines that streamline contract deployment and testing

• Collaborate deeply with core protocol engineers to expose new consensus and cryptography features through stable, ergonomic APIs

• Gather feedback from ecosystem teams, hackathons, and open-source contributors; iterate quickly on docs, examples, and DX improvements

• Instrument and analyze usage metrics to guide roadmap priorities and measure the impact of new tooling releases

• Champion quality with strong automated testing, CI, and release processes that keep SDKs dependable at scale

Qualifications

Must-Haves

• 4+ years engineering experience delivering production software used by external developers

• Strong JavaScript / TypeScript skills with deep knowledge of React and React Native

• Proficiency in at least one mobile language or framework (Swift, Kotlin, Flutter, etc.)

• Familiarity with blockchain concepts, wallets, key management, and JSON-RPC

• Experience shipping and versioning public SDKs or libraries with excellent documentation

• Comfortable working close to the command line, building CLIs, and crafting intuitive DX flows

• Clear written and verbal communication; ability to explain complex topics to varied audiences

• Bias for action and ownership in fast-moving startup environments

Nice-to-Haves

• Rust, Go, or C systems programming exposure

• Prior work on hardware wallets, MPC, or advanced cryptography

• Contributions to open-source developer tools or frameworks

• Background in performance optimization or distributed systems

Why Join Us

• Shape the stack that will power millions of on-chain transactions per second

• Impact at scale by enabling thousands of engineers to build novel crypto apps faster

• Collaborate with experts from high-frequency trading, systems research, and blockchain R&D

• Access cutting-edge resources including benchmark labs, high-end hardware, and learning budgets

Compensation & Benefits

• Competitive salary with significant equity upside

• Flexible work environment and unlimited vacation

• Comprehensive health, dental, and vision coverage

• Hardware and development tool stipend

• Annual conference and professional development budget