Embedded Security Engineer at Prysmatic Labs

July 15, 2021


Prysmatic Labs currently builds the underlying code for the Ethereum blockchain, building a more fair, open, and censorship-resistant Internet. On Ethereum, anyone can deploy software that controls digital value and is accessible around the world. Born in 2014, the Ethereum network houses billions of dollars worth of value today, hosting projects such as:

  •  Global, decentralized organizations
  •  Non-reserve backed, stable-value currencies
  •  Fully-open, permissionless, financial applications

We believe Ethereum represents a fundamental shift in how financial and coordination systems operate. Our work is open source and accessible to anyone around the world, and we are seeking individuals that also align with these values.

We are looking for a remote, full-time embedded security engineer to keep pushing the envelope on decentralized technologies. Particularly, having experience in penetration testing and Golang is a huge plus.

What We Build

The Ethereum blockchain today suffers from a key set of problems, using a wasteful proof of work algorithm in which miners around the world spend large amounts of electricity to package transactions into blocks. For over 4 years, researchers have been working on a better, more efficient consensus algorithm known as proof of stake along with a scalability method for the system known as sharding. No blockchain so far has been able to find the right balance of security, scalability, and decentralization, and we are thrilled to work on the cutting-edge every day to accomplish this task.

We’re currently building the foundational code behind the future of the Ethereum project, known as Ethereum 2.0Our flagship project, Prysm, is a full implementation of the next generation Ethereum blockchain written in Golang. Prysm utilizes the top technologies for production servers and interprocess communication, using Google's gRPC library, Docker, Kubernetes, and more.

Ethereum 2.0 is a multi-year project split into phases. The first phase launched December 1, 2020. At the time of writing, the Ethereum 2.0 network secures around $16 billion USD worth of value. Prysm runs a large portion of the network today. At Prysmatic Labs, the lines of code you write will be mission critical towards securing a multi-billion dollar network.

Who We Are

Prysmatic Labs started in early 2018 after a few of us on our team were curious about contributing to blockchain technology and posted on reddit and various forums trying to find other similar individuals to contribute to open source code. We realized scalability was the biggest problem the Ethereum blockchain was facing and wanted to take a stab at it given there was little work on the matter happening at that time. Our teammates have significant experience as software engineers having worked on cloud, networking, and systems design at enterprises such as Google and Riverbed Technologies.

We all began as volunteers writing Go code to implement a minimal sharding specification for Ethereum during our free time, and were noticed by the Ethereum Foundation and a few other groups for the work we were doing. Since the early days as a hobby project until today, we have received significant funding to work on Ethereum full-time. Today, we love to work at Prysmatic because of our motivation to build revolutionary technology while having fun doing so – the same reasons we started this project in the first place.

Our Core Values

“Software engineering is what happens to programming when you add time and other programmers” — Russ Cox

We believe good software engineering is more about excellent communication, careful design decisions, and problem solving rather than knowing the internals of a code library or API. At Prysmatic, we’re not afraid to look at documentation, stack overflow, and any other sources of information that can help us get the job done. Instead, we prioritize designing straightforward software solutions from first principles, creating design documents before writing any code.

Code quality is our most critical ingredient to keeping our platform open. Before we write new features, we focus on high quality testing, documentation, and ensuring code is maintainable. Our team uses a variety of technologies, including Golang, Docker, and Kubernetes to build the best possible suite of tools for blockchain technology. We believe good software engineers can pick up new technologies and learn how to use the best tools for the job rather than being nitpicky about being an expert in a specific framework or package.

We do not work as lone wolves, “rockstar coders”, or “10x devs.” Instead, we focus on deep teamwork to write code that lasts the test of time. We focus being concise rather than being clever. We care not only about the quality of our work but also about how we work together. It is the camaraderie, motivation, and fun we all have that makes working at Prysmatic a special experience. The code we write is mission critical towards securing billions of dollars and a powerful, new financial system. We all take good care and ownership of our code, and we’ll expect you to do the same when joining the team.

Job Description


We are looking for a remote, full-time embedded security engineer to keep pushing the envelope on decentralized technologies. Particularly, having experience in penetration testing and Golang is a huge plus.

We’re searching for a highly-motivated, team-oriented, and inquisitive learner to build great software with us. Upon joining our team, you’ll be fully involved in the design and code review process, have autonomy to take over non-trivial features from end-to-end.

The hard requirements for this position are as follows:

  •  Experience in security and/or penetration testing
  •  Significant experience as a software engineer, having worked on a team, participated in the design and code review process, and having not only shipped products, but successfully landed them
  •  Foundational understanding of Computer Science and a strong grasp on fundamentals, both in theory and in practice

Bonus points for the following:

  •  Experience in Golang
  •  Knowledge of Ethereum or blockchain-related technologies
  •  Deeper knowledge of the internals and limitations of Golang
  •  Knowledge of computer networking and p2p networking

The Role

In one month, you will have:

  •  Learned about the Ethereum blockchain’s internals, its roadmap, and the internals of our flagship project, Prysm, which will serve as the backbone for Ethereum’s next big upgrade
  •  Worked on threat modeling our software within the scope of the Ethereum proof of stake network
  •  Participated with other teammates in being the first line of defense against network failures, outages, and unexpected scenarios using instrumentation and best practices

In three months, you will have:

  •  Performed significant security analysis and improvements to our codebase
  •  Improved the robustness of mission-critical distributed and concurrent systems in our application
  •  Have taken ownership of several features from end to end on our roadmap through maintainable code with good tests, documentation, and clear design principles

In six months to one year, you will have:

  •  A deeper understanding of blockchain technology, cryptography, p2p networking, and systems architecture
  •  Mentored future team-members, junior developers, and external contributors; helping them level up technically
  •  Worked with the team to ship the next upgrades to Ethereum with a security-first mindset


Your personal success is paramount to the team’s success. We believe this opportunity is once-in-a-lifetime, allowing us to work on open source software with passionate engineers working on a cutting-edge solution the world has never seen. Every line of code you write will be mission critical in securing billions of dollars in value and we want to offer you solid benefits to make your experience working with us exciting and personally fulfilling.

The benefits we offer include:

  •  Insurance (Medical, Life, Vision/Dental) options that are built for both individuals and families, including almost full company contributions
  •  Competitive compensation
  • A fully-remote working experience, with paid travel with the team to key, important conferences for Ethereum such as Devcon (previously hosted in Osaka, Prague, and other cities)
  •  Unlimited PTO
  •  Autonomy and ownership of important features that will go live and secure billions of dollars in the Ethereum network
  •  Being part of a journey to develop something the world has not seen before, building a truly scalable, decentralized, and secure blockchain


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