Call Service Developer

Call Service Developer - Level 2

Location: Ipswich, UK
Duration: 3 moths rolling Inside IR35

About the Role:

We are seeking a skilled Call Service Developer to design, develop, and maintain telecom service applications leveraging Java and JAIN SLEE frameworks. The ideal candidate will possess a deep understanding of telecom protocols (preferably SIP) and have hands-on experience working with modern development, deployment, and version control tools.

This role is ideal for a developer passionate about building scalable, resilient, and high-performance telecom applications running in distributed environments.

Key Responsibilities:

• Design, develop, and maintain call service applications using Java and JAIN SLEE frameworks.

• Implement and integrate telecom protocols (eg, SIP) for Real Time communication services.

• Collaborate with cross-functional teams (DevOps, QA, Architecture) to ensure seamless integration and deployment.

• Optimize application performance and troubleshoot issues in Linux-based runtime environments.

• Utilize Docker and Consul for containerization, service discovery, and microservices orchestration.

• Work with MySQL and other data stores; make informed decisions on when to use RDBMS vs NoSQL databases.

• Maintain high code quality standards using Git for version control and follow CI/CD best practices.

• Participate in code reviews, architecture discussions, and contribute to continuous improvement initiatives.

Required Skills & Qualifications:

• Strong expertise in Java, with hands-on experience in developing scalable applications.

• Proven experience with JAIN SLEE framework and telecom application development.

• Good understanding of telecom protocols, especially SIP.

• Proficiency in Linux as a development and runtime environment.

• Experience with Docker and Consul for containerized deployments.

• Solid understanding of MySQL or similar relational databases, and general knowledge of data storage principles.

• Hands-on experience with Git for source code management.

• Strong problem-solving, debugging, and analytical skills.

• Excellent communication and teamwork abilities.