Senior VOICE Backend Software Engineer (Node.js and Java) | Remote | Bulgaria
About the position Sutherland Bulgaria is searching for a skilled Senior VOICE Backend Software Engineer (Node.js and Java). This is a FULLY remote position and can be based anywhere in Bulgaria. If you have extensive experience developing backend services and APIs using Node.js and have strong Java & Linux proficiency we want to connect with you today! Major advantage if you have experience developing software specifically for contact centers (platform familiarity w/Genesys/Cisco or similar!)
Responsibilities
- Provide deep technical expertise in backend development, code reviews, and architectural discussions, ensuring best practices are followed.
- Design, develop, test, and deploy backend software solutions using Node.js and Java, adhering to high-quality standards.
- Architect and optimize relational database schemas, write efficient queries, and ensure data integrity and performance.
- Develop and maintain components for real-time communication, including SIP signaling and RTP streaming.
- Explore and implement solutions for audio/video media processing and integration within the contact center environment.
- Contribute to the development of contact center-specific features and integrations, understanding the nuances of the domain.
- Identify and address performance bottlenecks, ensuring the platform can scale to meet growing demands.
- Diagnose and resolve complex production issues, providing timely and effective solutions.
- Work closely with product managers, architects, QA engineers, and other stakeholders to deliver high-quality software.
Requirements
- Extensive experience developing backend services and APIs using Node.js & Java.
- Strong proficiency in Java development for backend applications.
- Deep understanding of the Linux operating system and its ecosystem for development and deployment.
- Strong foundational knowledge of relational database principles, including data modeling, normalization, ACID properties, and transaction management.
- Proficient in writing complex and optimized SQL queries.
Nice-to-haves
- Experience with PostgreSQL physical design and optimization for high-throughput and low-latency applications.
- Experience with PostgreSQL programming, including stored procedures, functions, and triggers.
- Hands-on experience with Session Initiation Protocol (SIP) for signaling in voice and video calls.
- Experience with Real-time Transport Protocol (RTP) for audio and video data streaming.
- Familiarity with other applications and technologies related to audio/video media processing and streaming.
- Experience in developing software specifically for contact center environments.
- Familiarity with major contact center platforms such as “Genesys, Cisco”, or similar.
- Experience with cloud platforms (AWS, Azure, GCP) and containerization (Docker, Kubernetes).
- Experience designing and building microservices.
- Familiarity with monitoring and logging tools (e.g., ELK stack (preferable), Prometheus, Grafana).
Benefits
- Long-term job security with a permanent contract
- Additional health and life insurance coverage
- Generous annual leave
- Food vouchers and paid breaks
- Competitive salary and clear career progression
- World-class on-the-job training