Principal Voice (Backend) Software Developer at Sutherland


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Sutherland is Hiring

Job Info:
  • Company Sutherland
  • Position Principal Voice (Backend) Software Developer
  • Location Sofia, Bulgaria
  • Source SmartRecruiters
  • Published April 22, 2026
  • Category Development
  • Type Full-Time


Job Description

  • Technical Expertise & Guidance: Provide deep technical expertise in backend development, code reviews, and architectural discussions, ensuring best practices are followed.
  • System Development & Implementation: Design, develop, test, and deploy backend software solutions using Node.js and Java, adhering to high-quality standards.
  • Database Design & Optimization: Architect and optimize relational database schemas, write efficient queries, and ensure data integrity and performance.
  • Real-time Communication Technologies: Develop and maintain components for real-time communication, including SIP signaling and RTP streaming.
  • Media Processing & Integration: Explore and implement solutions for audio/video media processing and integration within the contact center environment.
  • Contact Center Domain Expertise: Contribute to the development of contact center-specific features and integrations, understanding the nuances of the domain.
  • Performance & Scalability: Identify and address performance bottlenecks, ensuring the platform can scale to meet growing demands.
  • Troubleshooting & Support: Diagnose and resolve complex production issues, providing timely and effective solutions.
  • Cross-functional Collaboration: Work closely with product managers, architects, QA engineers, and other stakeholders to deliver high-quality software.
  • Development Languages:
    • Node.js: Extensive experience in developing backend services and APIs using Node.js.
    • Java: Strong proficiency in Java development for backend applications.
  • “Platform:”
    • Linux: Deep understanding of the Linux operating system and its ecosystem for development and deployment.
  • Database Proficiency:
    • Relational Database Principles: Must possess a strong foundational knowledge of relational database principles, including data modeling, normalization, ACID properties, and transaction management.
    • SQL: Proficient in writing complex and optimized SQL queries.

 

Highly Desirable Skills and Experience:

  • PostgreSQL:
    • Physical Design: Proven experience in designing and optimizing PostgreSQL physical schemas for high-throughput and low-latency applications.
    • Programming: Experience with PostgreSQL programming, including stored procedures, functions, and triggers.
  • Real-time Communication Protocols:
    • SIP Signaling: Hands-on experience with Session Initiation Protocol (SIP) for signaling in voice and video calls.
    • RTP Streaming: Experience with Real-time Transport Protocol (RTP) for audio and video data streaming.
    • Media Technologies:
      • Familiarity with other applications and technologies related to audio/video media processing and streaming.
  • Contact Center Domain Expertise:
    • Experience in developing software specifically for contact center environments.
    • Familiarity with major contact center platforms such as “Genesys, Cisco”, or similar.
    • Cloud Technologies: Experience with cloud platforms (AWS, Azure, GCP) and containerization (Docker, Kubernetes).
  • Microservices Architecture: Experience designing and building microservices.
  • Monitoring & Logging: Familiarity with monitoring and logging tools (e.g., ELK stack (preferable), Prometheus, Grafana).
  • 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

All your information will be kept confidential according to EEO guidelines.

 


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