Callsign Jobs

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

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
• 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

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

Automatic Option:

• Health Insurance – single
• Life Insurance
• Employee Assistance Program
• 3 months full pay maternity & 2 weeks full pay paternity (if the statutory minimum is met)
• 25 days of annual leave + Callsign Bank Holiday (not included in holiday allowance)
• Free Financial Advice

Optional:

• Cycle to work scheme
• Wills and Estates – our benefits provider has partnered with a third party that offers a discount
• Home Utilities our benefits provider has partnered with a third party that offers a discount
• Cycle Insurance
• Health cash plans
• Cyclist protection
• Discounted gym membership