London Information Security Full-time

Security Researcher

We are looking for a Senior Security Researcher to join an amazing group of technologists to contribute to Corda, Corda Enterprise and other products in the Corda ecosystem. The role will revolve around securing the Corda platform, by undertaking vulnerability assessments, conducting security research and contributing to all stages of the secure development life-cycle. This will require collaborating with the engineering team to understand the development process, and supporting development using threat modelling, architecture and design.
You will have a history of conducting application vulnerability assessments and will be able to clearly communicate your findings through report writing and close collaboration with the engineering team. Ideally, you will have practical experience of secure development life-cycle and software engineering principles. You can work independently to research a problem domain to gain insight and subsequently deliver the work and solve the problem. You will be comfortable getting into the guts of a complex distributed system and be able to conceptualise its operation at many levels. Most importantly you are excited and motivated by the challenge of solving hard problems in a way that delivers to clients and delights them.
The Senior Security Research Engineer will have “practitioner” level skills in software development security, security architecture and engineering and security assessment and testing. They will also have competence in one or more of communication and network security, identity and access management (IAM) and security operations.


  • Good understanding of standard security vulnerabilities and their standard fixes and mitigations
  • Ability to identify security issues at different stages of the SDLC – from architecture & design through to implementation
  • Experience performing dynamic analysis of software using debugging tools
  • Expertise in Java, Kotlin, or a similar high-level language
  • PKI and Cryptography
  • In-depth knowledge of Java and JVM internals is beneficial
  • Reverse engineering experience
  • Experience solving Capture-the-Flag challenges is a bonus!
  • Develop tools to support vulnerability analysis
  • Excellent written and verbal communication skills, including the ability to convey highly technical information to non-technical audiences.
  • Build relationships with engineering teams to improve product security
  • Using revision control systems


  • Perform vulnerability assessments of the Corda platform with limited guidance from the Head of Security Research.
  • Conduct security research to identify novel threats and mitigations that may impact the Corda platform.
  • You will support the Engineering team by:
  • Educating and mentoring the team on relevant attacks, defence, mitigations and tooling
  • Contribute to secure software development design guidance that addresses both the security and business needs
  • Review source code to support the delivery of software 
  • Undertake threat modelling sessions and use advanced judgement to contribute to software designs.
  • Support research and evaluate the state of the art within the distributed ledger space.


  • First and foremost we want you to love what you do. You will be a security evangelist beginning to have recognition as a subject matter expert within R3 and the external community of Corda participants, both current and future.
  • You’ll have at least three years of experience in a security role, specifically in application security assessment. We’d love to see evidence of other experience too, you might have been a developer or network operations engineer in a previous life.
  • We believe that we work better as a team, and hope you share that belief. You have experience leading small teams and providing mentoring and guidance to junior engineers so they can meet their career aspirations and make meaningful contributions. You’ll be working with a diverse group of people with a variety of skills and backgrounds where your high level of emotional intelligence and influencing techniques can generate enthusiasm for your suggestions and recommendations for improvements.
  • You’ll need excellent communication skills, both verbal and written. You’ll be happy presenting to the company at all-hands meetings or explaining the impact of vulnerabilities you identify to a range of stakeholders. Regular collaboration with management and peers mean you contribute to tactical planning and solving complex challenges.

About us

R3 is a leading provider of enterprise technology and services for the development of multi-party solutions that enable direct, digital collaboration in regulated industries where trust is critical.

Our values

Customers first

Customer success is paramount. We build strong relationships and strive to create the best possible experience. Learn why so many of our customers view R3 as a trusted, long-term partner.


We bring together all parts of our ecosystem and give our customers the tools and environment to work together to change their industries.


We have the agility of a small company but the confidence and ambition of the industry-defining trailblazer we aspire to become. As a thought leader, R3 subject matter experts produce compelling analysis and insight into emerging technology.


We demand excellence and take pride in our products and services. We believe the Corda and Conclave platforms will transform the way the world does business.

Our benefits

We offer comprehensive and competitive benefits packages to ensure the wellbeing of all our employees and their loved ones. For a regional breakdown of our company benefits and perks, click here.

R3 may process the personal data collected or identified in accordance with R3’s Recruitment Privacy Policy. In particular, R3 will use the personal data provided for the purposes of processing your application for the role you have applied for, to assess your suitability for the role as well as to enter into a contract with you if you are successfully brought onto the R3 team.