Overview
Call Service Developer (Contract) — Location: Ipswich, United Kingdom. Rate: Negotiable. Duration: 3 months 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.
Job Details
Location: Ipswich, United Kingdom
Country: UK
Employment type: Contract
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