Cloud Operations Engineer (6 month FTC)



Manchester, UK
Posted on Thursday, October 26, 2023

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

As the front line supporting the Callsign platform your mission is to ensure our platforms are always up and running and providing high performing services to our customers. You draw on your knowledge of Cloud Operations, Application Support and the Callsign products to proactively identify and investigate errors and under-performance. If there’s a problem, the NOC provides root cause analysis, co-ordination and communication between the relevant parties to ensure it’s resolved as quickly as possible.

Areas of Accountability

  • Participate in a 24/7 on-call rota;
  • Work with our engineers to support the execution of production deployments and go-lives (including out-of-hours changes);
  • Provide 2nd and 3rd line Application Support on complex internally developed applications on a highly transactional Java platform;
  • Monitor the health, performance and availability of Callsign services (including key suppliers);
  • Proactively identify issues in the production systems, where the platform can be optimized, and introduce operational efficiencies;
  • Liaise with other teams to improve the quality and speed of root cause analysis;
  • Respond to service alerts within agreed SLAs;
  • Resolve or escalate faults to relevant teams;
  • Work with multiple teams on active bugs and create/update team specific knowledge base and skill sets;
  • Follow Callsign Incident Management process and manage production incidents, ensuring relevant people are engaged and that timely updates are provided;
  • Carry out routine configuration and maintenance tasks in accordance with standard operating procedures;
  • Create and maintain run book documentation and knowledge base.

Technical Competencies

Must haves:

  • 3-5 years in a Application Support roles with transactional, service-oriented Java platforms;
  • Extremely strong technical analytical and troubleshooting skills, and possess an ability to explain technical concepts;
  • Strong working knowledge of Kibana and Grafana or similar monitoring tools;
  • Experience supporting RESTful API;
  • Have experience in an environment using relational DBs such as MySQL, Oracle, PostgreSQL, NOSQL;
  • Experience supporting a 24x7 operational environment;
  • Experience with issue tracking and ticketing systems;
  • Good working knowledge of Linux operating systems and public cloud environments such as AWS, Azure or GCP;
  • Good working knowledge of version control systems such as Git;
  • Comfortable with command line shells (e.g. bash, zsh, etc.) and working knowledge of modern scripting languages such as Python;
  • You have an excellent command of the English language.


  • BSc or MSc in Computer Science or related degree from a reputed university;
  • Experience monitoring enterprise applications at scale, including N-tier or multi-platform applications;
  • Experience with administering and deploying to cloud-based environment;
  • Experience with distributed or micro services architecture, and event-driven architecture;
  • Experience with Infrastructure as Code (IaC) and cloud provisioning tools such as Terraform;
  • Experience with containerisation as well as container orchestration platforms like Kubernetes;
  • Knowledge of Spring Frameworks including Spring Security, Spring Boot, and Spring Data;
  • Having a working knowledge of Docker, Kubernetes, AWS, UNIX-based operating systems, and Microservices;
  • Familiarity with application security, and security practices.

Your approach

  • Strong customer focus;
  • Good verbal and written communication skills;
  • Great problem solving skills;
  • Keen to learn and expand own knowledge;
  • Naturally proactive and able to work independently;
  • Builds strong relationships with peers and colleagues.


Health Insurance – Single through Vitality;

Pension – Scottish Widows;

Life Insurance;

Employee Assistance Program;


Cycle to work scheme, cycle Insurance, cyclist protection

Discounted gym membership

Health cash plans

Discounts available via our benefits provider on: Wills and Estates, and Home Utilities