4K.COM Jobs in Los Angeles, United States

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Senior FullStack Software Engineer Blockchain


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Who is 4K?

4K enables anyone to bring physical assets on-chain by transforming real-world items into physically-backed NFTs. We’re building a decentralized coordination layer for the physical world — a new Web3 primitive — transforming the way physical assets can interact with the blockchain and enabling humanity to transact in trustless, permissionless, and never-before-seen ways.

Imagine a global network with thousands of nodes, each responsible for ensuring that a physical asset stored on the blockchain is legitimate, accessible, and protected. We’re building this foundational protocol along with a suite of applications that can run on top of it — starting with a marketplace for physically-backed NFTs.

Why what we’re building matters:

  • We’re creating digital property rights for physical assets
  • Dramatically more efficient marketplace transactions — lower fees, no managing physical inventories
  • Secure and insured storage — keep your assets on-chain, not collecting dust in your house
  • Collateralize and take loans against your physical assets using Decentralized Finance applications
  • Bring your Physical Assets into the Metaverse, online games, and state-of-the-art Web3 applications
  • Form DAOs to Acquire Physical Assets

We have backgrounds as NASA JPL engineers, DEFCON CTF winners, and Wharton & Harvard graduates. We raised $3M from several of the world's top blockchain VCs (Electric Capital, Consensus Capital, Crosscut VC, and more) and angel investors.

"Everything around you that you call life was made up by people that were no smarter than you. And you can change it, you can influence it... Once you learn that, you’ll never be the same again.” ― Steve Jobs

Who are you?

Are you fascinated by blockchain technology? Are you willing to own the product end-to-end? Do you see the potential for NFTs? Are you interested in helping to show others the light? If these questions resonate with you and you are an experienced full-stack software engineer, we would love to hear from you.

Your Missions

  • Be an essential voice in shaping the vision and roadmap of the company.
  • Own the development of 4K’s web apps end-to-end. Your decisions will have immediate and lasting impacts on how users interact with and perceive our platform.
  • Build out our product by being product driven and iterating quickly.
  • Work in collaboration with the engineering, design, and infrastructure teams to scale 4K.
  • Shape the engineering culture of the company.
  • Build out frameworks and define processes that will set precedents for our engineers going forward.

Skills & Qualifications

  • Expert level experience with React.
  • Expert level experience with backend JavaScript development in Node.js / Express.js.
  • Expert level experience with Web3.0 and Ethereum toolsets such as Metamask, and other related.
  • Experience with offchain orderbook / onchain settlement >
  • Understanding of Ethereum and blockchain technology.
  • Good understanding of the NFT marketplace ecosystem.
  • Work effectively with a high degree of autonomy.
  • Experience building dApps on L2s is a plus.

What You Will Like At 4K

  • You will join a world-class team that is pioneering a market where no startup has yet managed to establish itself.
  • As we are still early stage and our environment is fast-paced, your impact will be direct and you will have a great contribution on the company’s success.
  • We encourage open communication and have a good working environment for people to flesh out their creativity. At 4K, you can continue to learn and grow in a collaborative and iterative way of working.

Benefits of working at 4K

  • Fully remote and work from home culture.
  • Robust variety of project types.
  • Work with exciting brands.
  • Build applications at the forefront of blockchain technology.
  • Visa sponsorship available


  • Salary and equity benefits for this role are highly competitive and commensurate with experience. 4K is an equal opportunity employer.
  • 4K is committed to a diverse and inclusive workplace.
  • For individuals with disabilities who would like to request an accommodation during the interview process, please advise your company contact.

4K.COM focuses on Marketplaces, Cryptocurrency, and Blockchains. Their company has offices in Los Angeles, New York City, and San Francisco. They have a small team that's between 11-50 employees.

You can view their website at http://4k.com or find them on LinkedIn.