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.
Callsign is rapidly expanding its technology platform and is looking for excellent engineers to join their data engineering team, responsible for building state-of-the-art authentication solutions and real-time identity prediction systems based on Machine Learning and Reactive Programming.
Design, prototype, develop, test and operate application services of the JVM data platform
Collaborate on and estimate functional and technical stories, help with product backlog grooming and prioritisation
Work with other members of cross-functional teams on delivering on product features from inception to production
Skills And Requirements
No one person will have experience in all the technologies below, but the more the better.
Commercial experience using either Java, Kotlin or Scala for building distributed systems (event/message driven architectures, stream processing, RESTful APIs, gRPC)
Experience using asynchronous and reactive programming frameworks (e.g. Reactive Streams, JavaRx, or Spring Reactor, etc.)
Experience with persistence and caching technologies (Cassandra, AWS DynamoDB, RDBMS, Redis, Memcached, or Hazelcast, etc.)
Experience with messaging technologies (Apache Kafka, AWS Kinesis, SNS, or SQS, etc.)
Experience developing applications for containerised environments (Kubernetes, Docker etc.)
Experience with cloud compute platforms (AWS, GCP, or Azure, etc.)
Understanding and experience designing for scalability, resiliency and performance as well as observability (logging, metrics, tracing)
5+ years experience in Java, Kotlin or Scala microservices
Experience with security-conscious software
Experience with Spring Boot
Experience with configuring CI/CD pipeline
Experience in Python
Experience or desire to develop solutions leveraging Machine Learning
Please note: successful candidates are subject to a background check for this role.
Health Insurance – single
Employee Assistance Program
3 months full pay maternity & 2 weeks full pay paternity (if the statutory minimum is meet)
25 days of annual leave + Callsign Bank Holiday (not included in holiday allowance)
Free financial advice
Cycle to work scheme
Wills and Estates – our benefits provider has partnered with a third party who offers a discount
Home Utilities our benefits provider has partnered with a third party who offers a discount
Health cash plans
Discounted gym membership
- Company Name
- Job Location
- United Kingdom