Principal Voice, Backend Software Developer

Sutherland

Principal Voice (Backend) Software Developer at Sutherland, focusing on backend solutions using Node.js and Java. Collaborating on real-time communication components and contact center integration.

Posted 4/23/2026full-timeRemote • 🇧🇬 BulgariaLeadWebsite

Tech Stack

Tools & technologies

AWSAzureCloudDockerGoogle Cloud PlatformGrafanaJavaJavaScriptKubernetesLinuxMicroservicesNode.jsPostgresPrometheusSQL

About the role

Key responsibilities & impact

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

What you’ll need

Extensive experience in developing backend services and APIs using Node.js
Strong proficiency in Java development for backend applications
Deep understanding of the Linux operating system and its ecosystem for development and deployment
Must possess a strong foundational knowledge of relational database principles, including data modeling, normalization, ACID properties, and transaction management
Proficient in writing complex and optimized SQL queries
Proven experience in designing and optimizing PostgreSQL physical schemas for high-throughput and low-latency applications
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

Comp & perks

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

ATS Keywords

✓ Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

Node.jsJavaSQLPostgreSQLSIPRTPmicroservicesLinuxdata modelingACID properties

Soft Skills

technical expertisecode reviewsarchitectural discussionsproblem-solvingcollaborationcommunicationperformance optimizationtimely solutionsstakeholder engagementquality assurance