Senior Cryptography Engineer Key Management

Copper is a digital asset technology company dedicated to helping institutional investors safely acquire, trade, and store crypto assets.

Built and led by Dmitry Tokarev, a software and financial engineering specialist, the firm provides a comprehensive suite of custody, trading and settlement solutions that reduce counterparty risk and bring greater capital and operational efficiency to digital asset markets. At the heart of Copper's offering is Multi-Party Computation (MPC) technology – the gold standard in secure custody. Copper’s multi-award winning custody system is unique in that it can be connected to centralised exchanges, DeFi applications and even staking pools without the assets leaving the custody.Built on top of this state-of-the-art custody, ClearLoop™ is the first solution in the market that overcomes a growing industry challenge; counterparty risk with exchanges.

This solution underpins a full prime services offering, connecting global exchanges and enabling customers to trade and settle directly from the safety of their MPC-secured wallets. By reducing settlement time for transfers to a few milliseconds (without blockchain network dependency) and offering enhanced security measures, ClearLoop™ is rapidly reshaping the way asset managers trade and manage capital.In addition to industry-leading security certifications, Copper has one of the strongest insurance coverages in the industry from an A+ rated insurer, positioning the firm as the partner of choice for institutions seeking to safeguard their assets.Department environment Key Management: The Key Management team at Copper is tasked with developing the core components of Copper’s custodial solution. This entails the constructions of tools and services essential for secure storage and transfer of digital assets. A focal point of the team’s responsibilities includes developing and integrating MPC (Multiparty Computation)-based cryptographic signature algorithms. Additionally, the team is charged with the development of APIs that facilitate the interaction of cryptographic primitives with both client-facing applications and certain internal services within Copper.

Key Responsibilities of the role

You will participate in the design and implementation of various subsystems of Copper's new MPC-based key management infrastructure. You will integrate low-level cryptography primitives, written by in-house cryptography engineers into Copper’s internal MPC framework. Depending on your background, you may participate in implementation of relevant primitives as well. You will work on an SDK that’ll be used by client facing applications, securely running on a variety of hardware. You will produce production-level, well-tested and rigorously vetted code and you will maintain the same standards for your team members.

Your experience, skills and knowledge  Essential 

5+ years’ experience building software with an OOP language. Fluency in Go programming language, with demonstrated production-level engineering experience in developing and testing software in concurrent settings. Familiarity with algorithms, system design and distributed systems. Some Public Key cryptography background and/or mathematical aptitude in Abstract/Linear Algebra.

Desirable

Master’s or PhD in Mathematics or Computer Science in a subfield identical or adjacent to Cryptography or Distributed Systems. Experience with a greenfield Go project involving client-side applications. Experience in building P2P networks. Experience in developing low-level cryptography primitives. Prior experience with HSMs/TEEs including managed solutions like AWS Nitro Enclaves. Prior knowledge/experience with MPC or crypto custody.

Tech Stack For this position, you will predominantly work with Go. You will also need to interact with some interservice communication tools as well as some infrastructure tools. Relevant tech stack for this position:

Software development languages: Go Storage: PostgreSQL, MongoDB Interservice communication: RabbitMQ, Redis, gRPC, Protocol Buffers Infrastructure: AWS, Docker, GOCD, Prometheus, Kibana, Grafana

The benefits offered

Holidays: 27 days per annum paid holiday, in addition to bank holidays  Years of Service Days: Employees are awarded one additional day of paid time off per year of service (up to three years) Vitality Health:

Medical Insurance: Copper provides all employees with individual cover. Medical history is disregarded, and a 24/7 virtual GP is available (£100 excess per person per year)  Dental Insurance: Comprehensive dental cover for preventative, restorative and emergency treatment  Audiology Cover: Employees can claim back up 80% of costs, up to £300, for any hearing tests or hearing aids  Optical Cover: £500 optical cover (through Vision Express) or 80% reimbursement up to £300 for any other optician  Menopause Support: Unlimited support for those experiencing symptoms of the menopause, such as video consultations with a dedicated menopause practitioner  Vitality services also include an additional £100 for minor diagnostic tests and private prescriptions, including home diagnostics  Headspace - Copper's policy provides all employees with a free Headspace subscription. Headspace provides great resources to manage stress, improve sleep, meditate and enhance mindfulness  Discounts and free benefits - the Vitality programme has been designed for preventative care to encourage members to improve their overall health and will reward those for doing so. Employees can access additional benefits such as 50% off running shoes, discounted health screenings, 50% off at Nuffield Health or Virgin Active gyms and much more

Home Working Energy Support Scheme: to combat energy prices increasing globally, Copper will provide you, in addition to your salary, with a monthly top-up of £60 or £75 (subject to your energy supplier) Pension up to 10% matched contribution to our company pension scheme via Smart Pensions Cycle to Work Life Insurance cover: Four times your base salary EAP: access unlimited mental health consultations and contact a 24/7 confidential helpline for emotional support Unmind Sponsored Learning and Development opportunities Regular company events and social activities 

In return for everything you can bring to Copper, we can offer you an exciting, challenging role in a fast-growing and dynamic business, with career opportunities and welcoming working environment. If you think you have everything we're looking for and more, then we'd love you to apply for the opportunity.  Copper is an equal opportunity employer. We embrace diversity and equal opportunities in a serious way. We are committed to building a team that represents a variety of backgrounds, perspectives and skills. The more inclusive we are, the better our work will be. So bring us your experience, perspectives and skills. It is in our differences that we will continue to grow and ensure Copper is transforming how institutional investors engage with digital assets. Copper is an equal opportunity employer. We embrace diversity and equal opportunities in a serious way. We are committed to building a team that represents a variety of backgrounds, perspectives, and skills. The more inclusive we are, the better our work will be. So, bring us your experience, perspectives, and skills. It is in our differences that we will continue to grow and ensure Copper is transforming how institutional investors engage with digital assets. Copper is a Disability Confident Employer, please let us know if you have a disability. If you require us to provide any assistance during the recruitment process, then we would ask you to highlight this to us and we will be happy to accommodate.