Call Service Developer 23179

• Writing code for a variety of applications from large scale applications with hundreds of features to dedicated purpose microservices with a variety of languages frameworks and tools.
• Writing highly reliable and performant code to be used by services with requirements for high availability and throughput.
• Writing code with best practice and conforming to widely accepted design principles.
• Understanding high level requirements presented by network/application designers to implement new features enhance existing features for product/customer demand regulatory compliance service/vendor integration etc.
• Breaking down high level requirements into low level implementation detail ready for development such as defining features signalling sequence documenting detail defining data model.
• Writing test cases for automated test suites to verify that code that youve written/other people have written works well and integrates with other code applications.
• Identifying gaps in test coverage and filling the gap.
• Reviewing other peoples code to ensure that a high quality of code best practices and knowledge is shared in the team.
• Spreading knowledge about your work latest developments in the industry modern technology languages security best practices etc.
• Constantly trying to understand detail such as existing code features data model application requirements customer use cases.
• Identifying potential issues in code and how to resolve these before they cause real issues affecting customers.
• Analysing issues raised by Site Reliability Engineers inspecting logs signalling sequences data configuration identifying how to resolve issues.
• Identifying potential performance bottlenecks and how to remove these.

• In depth knowledge of Java language principles and design patterns including concepts from Java 8 e.g. lambdas streams and modern Java.
• Strong understanding of paradigms: Object Oriented Functional Event Driven Programming
• Understanding of Java frameworks e.g. JAIN SLEE Spring Boot Spring WebFlux etc.
• RDBMS systems e.g. MySQL Postgres and noSQL systems e.g. Redis Cassandra.
• Message brokers e.g. Kafka
• ClientServer protocols: SIP and HTTP
• Transport protocols: UDP TCP TLS
• Java Build frameworks e.g. Maven Ant
• CI/CD frameworks e.g. Gitlab CI/CD Jenkins Azure Devops
• Basic understanding of JVM including GC implementations e.g. CMS ParNew G1 and performance tuning.
• Good understanding of Linux OS environment command line tools user management networking with hands on experience.
• Scripting e.g. Bash Python.
• Virtualisation containerisation cloud frameworks e.g. VirtualBox Docker Azure Kubernetes.
• Git for code management.
• Infrastructure as code frameworks e.g. Ansible Terraform.
• Jira Agile Scrum

Leadership accountabilities

Experience youd be expected to have

The 3 Connected Leaders behaviours most suitable to the job:

• Solution focused Achiever: You deliver and coordinate activities and respond positively to challenges clearly outlining expectations for yourself and others.
• Collaborative Partner: You develop great working relationships with stakeholders and colleagues sharing knowledge and collaborating.
• Team Coach: You contribute to a high performing culture empowering others through coaching and development.

MANDATORY

• Java: 5 years
• RDBMS: 3 years
• HTTP: 2 years
• Maven/Ant/Gradle: 1 years
• Git: 1 years

PREFERRED

• SIP: 3 years
• Linux: 2 years
• Docker: 2 years
• JAIN SLEE/Spring Boot/WebFlux: 2 years
• Bash/Python scripting: 1 years
• Gitlab CI/CD Jenkins Azure Devops: 1 years

Key decisions

The BT way

If the job has key decision rights list these here

(see RAPID guidance).

As required to achieve the Team Leader role.

Java,Spring,Microservices,sip