Senior Cryptography Engineer

Russian hacker, Vladimir Leonidovitch Levin, attempted the biggest bank heist the world had ever seen via dial-up internet in 1994, Zia Hayat, Callsign CEO and founder, was hooked - armchair fraud became a real possibility. From this moment, Zia knew he wanted to play a part in stopping the bad guys and securing the internet for all. Founded In 2012, Callsign's mission has been to make Digital Identity simple and secure for everyone and everything. In that time, we've grown to over 200 employees, opened offices in Singapore and Abu Dhabi, been recognised as a WEF Global Innovator and our technology is being used by many of the world's leading financial institutions to keep millions of consumers safe.

But we aren't stopping here. The identity revolution has only just begun, and we are looking to hire the brightest and inquisitive minds to help us make every web, mobile and physical Interaction seamless and secure. If this sounds like you, lets chat.

Responsibilities:

• As a Senior Cryptography Engineer you will be enhancing and maintaining critical components which encapsulate/perform security processing, including those which manage/handle/use cryptographic keys.
• Proactively identify technical debt, where the platform can be optimized, and introduce operational efficiencies
• Design, document and implement secure, performant, scalable, highly transactional software, that adheres to functional and non-functional requirements, and be able to explain them to both technical and non-technical stakeholders

• Estimate, prioritize and execute tasks in a high-pressure environment
• Support the execution of production deployments and go-lives
• Work as part of an amazing team of like-minded individuals with a can-do attitude to change the world

• The opportunity to work in an Agile fast-paced environment, where requirements can change overnight and getting things done is as simple as making a case and leading the charge

Your Approach:

• You have experience with Continuous Integration
• You can estimate, prioritize and execute tasks either by pair programming or single-handedly in a high-pressure environment
• You have an excellent command of the English language

Requirements

Must Haves:

• Highly experienced C and Linux software engineer
• Significant experience of secure programming techniques and full SDLC
• Ability to produce robust specifications and implementations of critical components
• System level programming experience on Linux
• Strong knowledge of cryptographic algorithms and their usage, trade-offs and limitations
• Proven experience of working with key management standards (X.509, PKI), cryptographic standards (PKCS#*)
• Proven experience of working with crypto libraries to develop security components/solutions using C
• Strong knowledge of the cryptographic elements within application frameworks and standards e.g. JWT, JWKS

Desired:

• BSc or MSc in Computer Science or related degree from a top university
• Test Driven Development is your bread and butter. Without it, there’s just jam
• Familiarity with HSMs
• Familiarity with Windows security authentication and cryptographic frameworks
• Familiarity with low level Mobile security (iOS, Android) and associated hardware features
• Experience in working with Agile teams

Benefits

Competitive